The Florida Department of Agriculture and Consumer Services has mapped out a . Shell about 0.38-0.41 times as wide as high and about 20-27 mm long. Shell transparent or translucent. Penis with 5-15 papillae along right margin arranged in 1-2 rows (Fig. 200, 206). Shell larger, 2.2-4.8 mm long. On sibling species and genetic diversity in Florida Goniobasis (Gastropoda, Prosobranchia, Pleuroceridae). Vernacular names are given only for species. 1918. 1945. Snails on corn. 96). Fossaria cubensis Suture simple, not crenulated. Ghost Rams-horn Penis with two or more longitudinal crests within U-shaped superior tubercle (Fig. Aperture never with a septum. Shell without conical spines, although spiral threads may be present. Vertical sculpture reduced to irregularly spaced and uneven growth striations or low undulating ribs. (Say, 1829). . Rock Fossaria Sides of spire concave in outline (Fig. Suture deeply impressed, forming a channel. 124). Other families occur elsewhere in North America and in other continents. Goodrich, C. 1942. Fred G. Thompson (1934-2016) Shell usually opaque in adults, with a dark red callus inside the lip (Fig. Narrowly umbilicate. 19-21). Females ovoviviparous or oviparous. Malacological Review, Suppl. (Fmr.) (Conrad, 1834). Shell usually with raised spiral threads around periphery, frequently the uppermost thread has conical or triangular spines (Figs. Sculpture consisting of distinct spiral striations and threads superimposed on growth striations (Fig. Peristome ovate to subcircular. 132). They are brown in color and have a striped pattern. Occasional Papers on Mollusks, 2: 261-87. 118). Fossaria modicella 197-209). Floridobia ponderosa Whorls rounded, not carinate above; occasionally angular below. The radula can be studied by dissecting out the buccal mass and macerating it in clorox or sodium hydroxide. Taylor, D. W. 2003. Whorls 3.0-4.0. Four species currently are recognized, but the genus has received very little study over most of its range. The number of whorls persent on the shell can help you easily identify the snail species. 40). Basch (1963) revised the classification and recognized only twelve species. Arboreal forms, such as Liguus of Florida and Cuba, tend to be brightly coloured; terrestrial forms usually are drab. Penis with some superior tubercles fused into a U-shaped crest; parapical crest raised on a fleshy pedicel; accessory crest and inferior crest usually present (Fig. Males with penis at anterior right corner of mantle cavity. Shell with or without bands; slender; Suture deeply impressed; upper whorls with a strongly carinate periphery (Fig. Frequently the shells of ampulariids and viviparids are very similar. Most freshwater hydrobiids in the eastern United States are annual species. Apex fairly prominent as a rounded knob in the right posterior quadrant (Figs. 70, 71). The following shells are commonly found on Florida's beaches. (Lea, 1962). After the shells are thoroughly rinsed, they can be air-dried in cardboard trays. Aperture relatively shorter, about half or less the length of the shell. Giant Snails Invading Florida, "Major Threat" to Crops. Florida Press, Gainesville: i-xv, 1-68; pls. It wasn't until 2021 the population was. Nuclear whorl 0.41 mm in diameter transverse to initial suture. Mantle richly marked with reddish-brown blotches and spots. Sculpture above periphery of whorls consisting of nodes arranged in vertical and spiral rows. Columellar margin of aperture very thick but not reflected over umbilical area (Fig.103). Length of shell 2.0-2.5 mm (Fig. Shell unicolor, never banded. In others they are deposited in the water in gelatinous clusters. Length of shell 3.0-4.0 mm (Fig. In Pasco County Florida, a quarantine order was issued for people after the re-discovery of the giant African land snail, an invasive species that can harm to humans, structures, and wildlife. Shell large, 3.7-4.5 mm long; adults with 4.6-5.3 whorls; lower corner of aperture slightly extended forward as a weak, tongue-like projection (Fig. 2018). The following key is modified from Basch (1963). Columellar margin of aperture wide, rounded in front like a spindle. Thiarids are ecologically significant because they tend to replace native snails where they are introduced and because of their abundance. Most snails will have a conical shaped shell. Shell larger, thicker, and opaque; spire 0.9-1.3 times length of aperture; with more than 4.2 whorls; penis flagellum with glandular crests. Planorbis alabamensis and dilatatus in the Floridian Pliocene. Body whorl relatively rapidly expanding in diameter (Fig. The VIVIPARINAE is widely distributed throughout Europe, Asia and eastern North America. The author has attempted to simplify the key to include the minimum anatomical data needed for accurate identification. Embryonic shell smooth, without spiral chords (Fig. Pomatiopsis lapidaria Aphaostracon monas Crystal Siltsnail Adequate preservation begins when the specimens are collected. Length of shell up to 5 mm. In Florida, the African land snail existed largely in Miami-Dade County, although hundreds of the pests were found in Broward County, specifically western Davie, in 2014. . . The coloration of the aperture and the embryonic shell is not consistent within single population samples, and the contour of the outer lip is highly variable within single drainage systems and with the age of the specimens examined. Shell subcircular, smooth, often encrusted with dark material. Sculpture consisting of fine incremental threads, and spiral striations that may become obsolete at maturity. Giant African Land Snail Identification Sheet - Florida Commissioner of . Operculum paucispiral, with about three rapidly expanding whorls (Fig. 75, 76). 3). 92). Body whorl compressed (Fig. (Say, 1825). 100). 146). Body whorl angular. M-879 CONE SNAIL, Conus floridanus A small and less poisonous species, no one has ever died or been stung by one of these slow-movers, but like all cones, they have a venomous proboscis. Haitia cubensis Body whorl relatively narrow, not conspicuously enlarging near aperture (Fig. 2015; Agudo-Padron 2018). Sculpture variable. Thompson, F. G. 1983. Shell conical to ovate-conical. The snail can wreak havoc on agriculture and carry a parasite that causes meningitis in humans.. In the event that only shell specimens are available, picture-matching may be necessary to eliminate some choices in the couplets. 16, 17). Hood Ancylid Malacologia, 23: 81-82. Little is known about these animals, and diverse opinions exist as to how many species are recognizable. Adult shell small, less than 3 mm high; umbilicus narrow but not occluded by the columellar lip; columellar margin of the aperture weakly concave (Fig. This genus contains three species. A giant African land snail, photographed at a lab in 2014. Stately Elimia More data based on many population samples from throughout this range will be necessary before the validity of the three forms can be determined. 180-182). Proc. Shell medium-sized, 2.8 3.5 mm long; spire 0.9 1.1 times length of aperture; shell with 4.2-4.7 whorls (Fig. Vas deferens the only duct present in penis (Fig. Somatogyrus is distributed from the Mississippi River drainage system east to Atlantic coastal streams, and south to the Gulf coastal drainage systems. Shell translucent. Parietal margin of operculum slightly convex in outline (Fig. Identification of Marine Snails reefdup Identification, Snails July 3, 2020 Cerith, Collonista, Collumbellid, Conch, Limpet, Nassarius, Nerite, Ninja, Pyramidellid, Snail, Stomatella, Turbo, Vermetid 3 Comments Marine snails come in all shapes, sizes, colors, and function, so proper identification is crucial! Apex distinctly convex in outline. Shell small, about 3.0-3.5 mm long; adult with 4.4-4.8 whorl; lower corner of aperture tending to be angulate with fluted channel (Fig. (Thompson, 1968). 164, 167). Seashell Identification Identify your Florida Gulf Coast seashells! Gulf Coast Pebblesnail) Somatogyrus walkerianus (Aldrich, 1905). Attains a length of about 30-36 mm (Figs. Suture relatively shallow. Apex in the posterior right third, domelike and evenly rounded. (Say, 1829). Dusky Ancylid Floridobia petrifons (Lea, 1838). JACKSONVILLE, Fla. - An invasive giant African snail that has already had to be eradicated twice in the last 50 years in Florida is back and one county is on high alert. (Thompson, 1968). 153). Aphaostracon rhadinus Outer lip straight in lateral profiles. MESZAROS: It's not clear how these snails entered Florida again. (Lamark, 1822). Female ovoviviparous with about 50 embryos in uterus; embryos clearly evident through clean shells. The beaches in Florida are perfect for shelling and beach combing. Penis with 17-50 papillae along right margin arranged in 3-5 rows (Fig. Length of shell 2.0-2.4 mm (Fig. 162). (Thompson, 1968). Walkerana, 1: 81-365. Lioplax pilsbryi choctawhatchensis 1963. Radial striations present or absent Laevapex Walker, 1903. 45). One species occurs naturally in Florida, and three others have been introduced. The other three forms, C. limum (Anthony, 1860), C. floridense Call,1866 and C. parthenum Vail, 1979, are exclusively apomictic parthenogens and have been separated on the basis of aperture coloration, embryonic shell coloration, and contour of the outer lip (Vail 1979a). 111). 202, 208). (Weatherby, 1879). 7-9). Occasional Papers of the Museum of Zoology, University of Michigan, (456): 1-6. (Fig. Shell larger, reaching a maximum diameter of 18 mm. Blue Spring Hydrobe Rotund Mysterysnail Widely umbilicate. Dipping them in a dilute solution of oxalic acid and gently scrubbing them with a fine brush can clean such specimens. Size small I I to medium, 8-12 mm in length. The following key includes all of the species that occur in Florida and some that occur in Alabama, Georgia, and South Carolina. Alexander Siltsnail Bantam Hydrobe Live field samples should be divided into two groups, one to be preserved for shells, the other to be preserved for anatomical specimens. Suture more deeply impressed than in 77a. Adults about 6-8 mm wide (Figs. It is hoped that this manual will stimulate other biologists to contribute to our knowledge of freshwater mollusks. Operculum neomelanian, with a small, rapidly expanding nucleus located near the basal margin (Fig. Shell variable in shape, elongate to globose; usually not more than 5 mm in length; apex of spire seldom eroded (except in Somatogyrus); 4-6 whorls; shell smooth (except in Pyrgophorus and Tryonia); central tooth of radula with basal cusps (Figs. Aperture strongly oblique. Last whorl not shouldered (Figs.155, 156). In previous editions of the manual species of Floridobia were placed in the genus Cincinnatia. Aperture narrowly in contact or free from preceding whorl. Paper fig A Florida Gulf Coast specialty shell! 140). Shell unicolor brown, never mottled with reddish spots. 105, 106). The number of subfanilies recognized in the Hydrobiida is unsettled. Low-dome Physa Shell conical with strongly arched whorls and a deeply impressed suture. Apex of shell flat, though it may be raised above the periphery of the last whorl (Figs. Fine vertical ribs present on uppermost whorls. When trying to identify the type of snail, the easiest method is to check it out closely. Though small, this elusive specimen is a rare and valuable jewel, waiting to be discovered. According to the Florida Department of Agriculture and Consumer Services (FDACS), the giant African snail, commonly referred to as GALS by invasive-species aficionados, is native to East Africa . Endemic New World genera occur in Cuba, Jamaica, and northern South America. The molluscan family Planorbidae. In Florida four types of Campeloma have been recognized. Elimia doolyensis Embryonic shell with a strong peripheral spiral chord that continues onto following whorls (Fig. Moderately large, thick-shelled operculate snails. Fawn Melania (Fig. Adults 9-15 mm wide (Figs. Most have monotonously simple, conical or depressed-conical shells that are nearly devoid of taxonomically useful characteristics. Amnicola dalli. Shell conical or globose-conical; thin, translucent, occasionally opaque. (Thompson & Hershler, 1991). Average length about 4 mm (Figs. Umbilicus variable. This is particularly so in the Pulmonata. Approximately 35 species have been described. Contents 1 Shell description 2 Distribution 3 Ecology 4 References 5 Further reading Shell description [ edit] Five views of a shell of Pomacea paludosa Spiral angulation on whorls sharp and prominent in juveniles, usually becoming convex-rounded or smooth on last whorl in adults. Pyrgophorus platyrachis 119). Shell small, 2.0-2.8 mm long. Females with live embryos in brood pouch in mantle; males with right eye stalk modified as a penis. With the exception of Liguus fasciatus, these snails have shells that vary in color from ivory to tan, often with brown markings.Liguus shells are brilliantly colored and are frequently marked with yellow, green, pink, and brown. Operculum constructed entirely of concentric rings (Fig. This revision follows the classification proposed by Taylor. 75). Aperture usually open; occasionally with a horizontal, shelf-like septum closing posterior part (Fig. Body whorl strongly keeled as though pinched at the periphery (Figs. 6). Spilochlamys is most similar to the next genus, Cincinnatia, from which its shell usually differs by having a more deeply impressed suture, more strongly shouldered whorls, and a wider umbilical perforation. Lower margin of aperture not advanced beyond upper margin. Whorls uniformly rounded, not flattened above (Fig.144). Some shells may be heavily encrusted with mineral deposit and algae, which may obscure details of the sculpture and color. Umbilicus narrow, deep (Fig. 161, 164, 167). Wekiwa Siltsnail 4, 5). A synopsis of the classification of the freshwater Mollusca of North America north of Mexico and a catalogue of the more recently described species with notes. 49, 50). Radial striations present on shell but not on apex. Shell more slender, about 0.30-0.35 times as wide as high. TAMPA, Fla. - A horntail snail, an invasive pest common in India, has been found in Miami-Dade County, spurring agriculture officials to start a program to prevent the possible spread of the species, the Florida Department of Agriculture and Consumer Services said Thursday. (Thompson, 2000). Penis with one papilla on left margin (Fig. Pomacea canaliculata The genus is found along the east coast of North America from Maryland south to Tabasco, Mexico. Sides of spire slightly convex. Aperture oval, about 0.75 times as wide as high. October 14, 2021 7:00 am. Henscomb Hydrobe Shellolive-colored; spire straight-sided. Curator of Malacology In some genera, eggs are deposited above the water in dry clusters on stems, trees, walls, etc. 82). The planorbid snail Micromenetus dilatatus avus in the West Indies and Central America. Female shell about 3.5-4.0 mm long (Fig. Shell variable in shape. In the USA, it was first identified in New Orleans in 1939, but now is found in the Gulf Coast states from Florida to Texas, as well as in Puerto Rico and Hawaii. 12). Shell usually squarish or rectangular in shape. Shell smaller, generally less than 12 mm long. Medium to large freshwater snails found on all continents except South America. (The penis is normally recurved into the mantle cavity, except during mating. These are white, which is the more prized color in. Haitia bermudezi It also was the first adequately illustrated faunal summary published on the Southeast. Suture relatively deep, Whorls of spire rounded. It is represented in North America by Viviparus. Shell conical; thin and transparent; 4.0-4.5 strongly arched whorls. Combining characteristics of cranes and rails, it . Penis filament white. Enterprise Siltsnail) Floridobia monroensis (Dall, 1885). Amnicola rhombostoma Parietal margin of operculum convex. Florida Applesnail 128). Penis with 3 I 0 small papillae around base and 7-15 papillae along right margin in a single row (Fig. Malacological Review, 19: 85-86. Spire long, 1.3-1.7 times length of aperture, convex in outline; shell relatively large and nearly cylindrical; 4.0-4.9 mm long; whorls 5.0-5.7, strongly rounded with a deeply impressed suture (Fig. Excentric Ancylid Micromenetus brogniartiana This family contains twelve genera in North America. Ferrissia hendersoni Planorbula armigera wheatleyi Nat. Apex less than 0.4 times length of shell. Shell thick and solid; whorls weakly convex or flattened (Figs. (Thompson, 1968). Those available covered only part of the state or part of the fauna. This family includes four North American genera, Amnicola, Dasyscia, Colligyrus and Lyogyrus, and the European genus Marstoniopsis and some Asian genera. Aperture relatively ample (Figs. Thin and translucent or transparent. Pewter Physa 1918. Viviparus contectoides limi, new name for V. c. compactus Pils. Shell conical, olivaceous in color. Adams, 1841). Mihalcik, E. L. & F. G. Thompson. Knobby Elimia Last few whorls in large adults scalariform. 89). Floridobia vanhyningi Penis with a dense pattern of superior tubercles. Shell moderately large, 3.7-4.5 mm long; spire 1.00-1.35 times length of aperture; shell with 4.8-5.4 whorls. It contains about a dozen species in North America. They are beautiful when they are alive because the body of the snail is black with tiny white dots like the milky way galaxy. Thiarids are found in tropical and subtropical regions of the world. Umbilicus open, although very narrow in some species; occasionally closed. 159-179). 131). Apex about 0.4-0.5 times length of shell. 173). 203, 209). This subfamily includes about fifteen North American and European genera (Thompson 1979). Umbilicus broad, shallow (Fig. Sci. Hebetancylus excentricus 109a, 109b). By Ker Than for National Geographic News. Sculptured with regularly spaced, fine, incremental threads and spiral striations; spiral striations evident only on base of whorls in some specimens. Includes the limpkin, a Sunshine State specialty. Penis with 0-6 papillae confined to right margin (Figs. Length of shell 2.6-3.0 mm (Fig. Acad. Pygmy Siltsnail) Floridobia parva (Thompson, 1968). Planorbella duryi Occasional Papers on Mollusks, 2: 385-412. Female oviparous, never with embryos in uterus. Shell planispiral, adults large, 35-50 mm (Figs. The Snail Kite uses its slender, curved bill to extract its primary prey, the apple snail, from its shell. Penis with a few simple scattered superior tubercles on outer surface; parapical crest on a low ridge; accessory crest and inferior crest absent (Fig. They are most common on tropical islands but occur also in cold regions, where they hibernate. 169, 172). An invasive, giant snail species, that can also lead to outbreaks of meningitis, has been found in New Port Richey. 145). A review of the recent freshwater limpet snails of North America. Seminole Siltsnail 1956. Apical whorls bluntly rounded and not conspicuously elevated. Some species that are endemic to Florida springs live in environments with nearly constant temperatures and apparently reproduce continuously throughout the year. Average length about 5.5 mm (Figs. Laevapex is a North American genus. It should be remembered that it is only a key which emphasizes shell characters. Wekiwa Hydrobe 95). 99). 61). Shell generally thin but strong; whorls of spire strongly convex with deep suture (Figs. State officials said the last live snail found in Florida before the Pasco . Adult shell without lamella on interior walls of aperture. Each snail has both female and male reproductive organs, so they can reproduce rapidly. 86). Aperture loosely attached to or widely separated from preceding whorl. Basch, P.F. Body whorl uniformly rounded peripherally (Fig. Last whorl of adult shell smooth or with growth striations, but not with ribs and spiral chords. This genus of minute freshwater snails is endemic to the Florida peninsula. Its brown spotted exterior provides camouflage, making it a challenge to spot. It matters not that the specimens are stored in 70 percent alcohol after having been fixed in formalin. 57). Marisa cornuaurietus Until recently the entire knowledge of the Florida freshwater snail fauna was based on miscellaneous papers dealing with single species, groups of closely related species or single river systems. Shell moderately elevated, over 0.25 times as high as long. This study was a landmark contribution to the malacology of the southeast, and it summarized the known fauna of western Florida. Walkerana, 13: 1-108. The first snail is Euglandina rosea, the "rosy wolf snail" it is carnivorous, and eats other snails.The second snail is Zachrysia provisoria, the "garden provisoria", which can be a pest as it enjoys fruits and vegetables.These snails are both native to Florida; neither species can survive in the wild in cold climates, but both species have been introduced to other . Spiral sculpture absent. Aperture broadly ovate. Clench, W.J. In parthenogenetic organisms each population is inbred in the strictest genetic sense, and frequently a population will have minor characteristics that distinguish it from others. Apex very short, only slightly raised above body whorl. Brownish-yellow in color (Fig. Operculum paleomelanian, with a large sub-centrally located nucleus (Fig. Mantle cavity with gill on dorsal surface. 83). Helisoma anceps anceps 1934. Review of the Planorbidae of Florida with notes on other members of the family. 171-173). (Walker, 1908). 110). It is essential that clean specimens be examined under proper lighting to observe diagnostic sculpture characteristics. Parapical crest of verge greatly enlarged. (Pilsbry, 1899). The primary differences between the two families are based on soft anatomy. In previous editions of the manual the Florida species were placed in the genus Physella. It has many colorful stripes, colors, and bands on its shell which are usually orange, light orange, dark orange, or yellow. (Conrad, 1834). Marsh Sprite Size smaller than last species, seldom exceeding 10 mm in width (Figs.194-196). Unlike other brown-tinted giant snails, this. Our knowledge of the fauna has greatly increased during recent years, and a summary of this information was desirable to facilitate other kinds of study. The species of snail was present in Florida in the 1960s and 1970s before being eradicated in 1975, the FDACS said. Suture more deeply impressed. The deterioration process is not reversible. 70). Swallow-tailed kites are spring and summer residents; snail kites are specially adapted to feed on apple snails in Florida freshwater wetlands year 'round. Spire shorter, conical, 0.7-1.3 times length of aperture, nearly straight-sided in outline, suture of whorls weakly or moderately impressed. Sculpture consisting of incremental striations only. Vertical ribs reduced in size, but with bold spines at the periphery; spiral threads above periphery relatively weak; adults up to 35 mm long (Fig. Shell smaller, reaching a maximum diameter of 13 mm. 148). Melanoides turricula Now officially known as simply a Snail Kite, the subspecies from Florida and Cuba (Rostrhamus sociabilis plumbeus) formerly known as the Everglade Snail Kite was listed as endangered in 1967.The range of the Florida population of Snail Kites is restricted to watersheds in the central and . (Pilsbry and Johnson, 1903). Sides of spire straight-sided in outline. Lymnaeids are a nearly cosmopolitan family of freshwater snails. Aperture non-operculate; mantle cavity modified into a lung. The current status of these introductions is not known. Eight species have been proposed. Typically, land snails live on or near the ground, feed on decaying plant matter, and lay their eggs in the soil. The island apple snail is the largest of the known species in Florida with shell sizes up to five inches in length. From a distance, the snail kite generally resembles a medium-sized hawk with broad wings. They are variable in their shell characteristics, and some samples may be difficult to identify. Our state park system has won national awards . Bulletin of the Florida State Museum, Biological Sciences, 1: 97-239. Spiketopped Applesnail (Mihalcik & Thompson, 2002). Snails in wild populations range in shell color from yellow to brownish-black, and may contain stripes or dimpling. Penis of males with papillae along sides (Figs. Rails, gallinules, coots and cranes. Hyacinth Siltsnail) Floridobia floridana (Frauenfeld, 1863). Suture not as deeply impressed as in 77b. Click on any of the seashell identification photos for information about each shell, where they were found, who found these shells and so much more. In 2011, a population of the pests was discovered in Miami-Dade County. (Pfeiffer, 1839). 77-79). About 4.2-4.6 weakly arched whorls with a weakly impressed suture. Sculpture above periphery of whorls consisting of sharp spiral chords and distinct vertical ribs; shell attenuate. Earlier whorls of adult shell with heavy vertical ribs crossed by knobby folds or a strong spiral chord; sides of spire straight or weakly convex in lateral profile; embryonic shell with a single spiral chord on periphery and heavy vertical ribs, but without basal spiral chord (Fig. One to several dark growth-rest varixes usually present on last whorl. Ancylid gastropods are small, fragile limpets found in most freshwater habitats. (Anthony, 1860). Bayou Physa Most other genera have received relatively minor attention, and their systematics are in flux. Operculum tightly coiled with four slowly expanding whorls (Figs. Spurwinkia: Morphology, systematics, and ecology of a new genus of North American marshland Hydrobiidae (Mollusca: Gastropoda). Elimia buffyae Florida Flatcoil: Golden Zachrysia: Zachrysia provisoria (L. Pfeiffer, 1858) Gastrocopta pellucida (L. Pfeiffer, 1841) Zonitoides arboreus (Say, 1817) Garden Zachrysia: Slim Snaggletooth: Quick Gloss: Mesomphix globosus (MacMillan, 1940) Hawaiia minuscula (A. Binney, 1841) Mesodon thyroidus (Say, 1817) Globose Button: Minute Gem: White-lip Globe Prepared by Fred G. Thompson, Fmr. Shell obese and ponderous. Shell conical, thick, opaque. Shell conical or cylindrical-conical in shape; spire elevated; body whorl not disproportionately voluminous; umbilicus closed or open. This causes problems in species identification and yield an undermeasure of the actual number of species that exist in nature. There is much disagreement as to how many species actually exist. Shell globose with a short depressed spire; body whorl ample; umbilicus closed. 130). Penis with a small blade-like flagellum along right margin and a heavy mid-ventral ridge that bears 8-11 narrow transverse dermal glands; other glands present on terminal lobe and flagellum (Figs. i-xxxvi, 1-530 pls. NotogiIlia wetherby (Vanatta, 1935). Shell unicolor, with distinct vertical sculpture in addition to strong spiral sculpture. Apex proportionally longer, about 0.3-0.5 times length of shell. Terminal lobe of penis slender. J. Clench and Ruth P. Turner (1956) published a survey of the fauna from the Suwannee River west to the Escambia River. 115, 116). Waccasassa Elimia Many samplings of hydrobiids collected during the period of May through September are not identifiable because only immature forms are present, and important diagnostic anatomical characteristics have not yet developed. Outer lip partially flattened in adults. (Thompson, 1968). 16, 25, 28). (Couper, 1844). Aperture comma-shaped, tightly appressed against preceding whorl. Laevapex diaphanus Size small, discoidal, adults seldom exceeding 4 mm in width. The snails identified in Pasco County look different from the ones previously seen in Miami-Dade County: Their flesh is creamy white, rather than grayish brown. 158). Base of shell usually without spiral band. All freshwater limpets in the southeast belong to this family. Never preserve shell specimens in formalin. Shell light brown and frequently mottled with rust-colored spots that may form a spiral row below the suture. Littoridinops monroensis Shell planular or disc-shaped; spire flat when raised above succeeding whorls (Figs. Viviparus intertextus A Guide to Florida Bird Species. Elimia dickinsoni Shell with 5.6-6.8 whorls; about 3.2-4.5 mm long (Fig. Amnicola is a widespread genus in temperate North America. Click on the link in the row that best matches your snail. Applesnails are tropical to subtropical organisms and cannot survive below 50F in the winter (Florida DOACS, 2002). Elimia athearni Females with an egg-laying groove or sinus on right side of foot; eggs deposited on substrate. 34); penis frlattened, blade-like (Fig. Shell elongate-conical. Three species in Florida were introduced from Southeast Asia. Medium- to large-sized tropical freshwater snails. Shell sculpture with incremental striations only. Outer lip of aperture with a thick callus on inner surface. Accessory crest absent. Nautilus, 83: 72. 199). Shell distinctly carinated above and below; both apex and base funnel-shaped. Officials in Florida are again battling a highly invasive, extraordinarily destructive giant snail species that also happens to be capable of spreading parasitic worms that invade human brains . (Dall, 1885). (Sowerby, 1878). 137, 139). The systematic relationships of the hydrobiid snail genus Nymphophilus Taylor, 1966 and the status of the Subfamily Nymphophilinae. Maiden Campeloma Haitia pomilia pomilia Burch, J. Ecology: This large snail is found in freshwater lakes, rivers, streams, ponds and ditches, preferring slow-moving water. Thick-shelled Hydrobe Lip of adult shell usually with a thick crest externally and an internal callus. Littoridinops is found most frequently in brackish water, although the three species found in Florida also occur in frehswater. It should also be remembered that many groups have not been studied sufficiently, and the reader may have material that adds to or contradicts previously recorded information. The sexes are separate and fertilization is internal (Andrews, 1964). As a result . Female shell about 4-6 mm long (Figs. Shell with a brownish hue. Shell conical or cylindric-conical; light to dark brown.