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(Thompson & Hershler, 1991). Critical Florida references are Thompson 1968, 1969, 2000; Thompson and Hershler, 1991, and Hershler and Thompson, 1992. The snail can wreak havoc on agriculture and carry a parasite that causes meningitis in humans.. Generally with distinct axial and spiral striations. Additional genera occur in the Orient, Southeast Asia, Africa, and South America. 129). Length of shell 2.4-3.4 mm (Fig. Columellar margin of aperture wide, rounded in front like a spindle. Suwannee Hydrobe Fine vertical ribs present on uppermost whorls. (Thompson, 1968). Gulf Coast Pebblesnail) Somatogyrus walkerianus (Aldrich, 1905). 208, 209), although radial striations may be present on other areas of shell. Shell thin, fragile, very much depressed, less than 0.25 times as high as long. Evolution has occurred through reproductive specialization, with each genus and most species having distinctive patterns of dermal glands. Stately Elimia Most other genera have received relatively minor attention, and their systematics are in flux. Penis with a single papilla along left margin (Fig. Spire usually about equal to or greater than height of aperture (Figs. Thompson, F. G. 2000. 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. The state says a "gastropod enthusiast" collected unusual snails in the Coconut Grove area back in August. Sexes strongly dimorphic in size, males about half as long as females. 5). Umbilicus closed or narrowly perforate. Shell relatively thick (Figs. Wekiwa Siltsnail Penis with 0-6 papillae confined to right margin (Figs. Shell nearly smooth, sculptured with irregular growth striations. Most freshwater hydrobiids in the eastern United States are annual species. The radula can be studied by dissecting out the buccal mass and macerating it in clorox or sodium hydroxide. (Pfeiffer, 1839). Aphaostracon xynoelictus Opercula of minute snails can be studied most easily by removing them from the animal and viewing them with transmitted light. 59). The criterion of inbreeding for defining species cannot be applied, and other objective criteria are not yet been established. Revista de Biologia Trpical, 51 (supplement): 1-299. Spire of adults without distinct vertical ribs. They complete their life cycles in one year. Papilla with a duct that leads to a blind caecum in nape of snail. Apex nearly straight-sided or concave in outline. Planorbella duryi Identification. One species, C. chinensis malleatus (Reeve, 1863) (Fig. Shellolive-colored; spire straight-sided. Periphery of last whorl bluntly angular, lying below plane of apex (Figs. (Thompson, 1968). Pomacea paludosa (Thompson, 1969). Pomacea canaliculata (Lamarck, 1822) (Gastropoda, Prosobranchia, Pilidae): A freshwater snail introduced into Florida, U. S. A. Malacological Review, 30:91. 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. Giant Snails Invading Florida, "Major Threat" to Crops. dalli Define Invasive Species: must have ALL of the following -. The horntail snail belongs to the genus Macrochlamys (family Ariophantidae), which has over a hundred described species distributed from South to Southeast Asia and southern China (Pholyotha et al. Adult shells about 40-60 mm high (Fig. (Thompson, 2000). 89-91). The giant African land snail ( Lissachatina fulica (Bowditch)) (GALS) is one of the most invasive pests on the planet, causing agricultural and environmental damage wherever it is found. Spiral angulation on whorls sharp and prominent in juveniles, usually becoming convex-rounded or smooth on last whorl in adults. Whorls globose, with a deeply impressed suture. Thompson, F. G. & R. Hershler. Sides of spire slightly convex. The island apple snail is the largest of the known species in Florida with shell sizes up to five inches in length. Includes the limpkin, a Sunshine State specialty. The family contains numerous genera and species, some of which are important medically as intermediate hosts for trematode parasites. J. Clench and Ruth P. Turner (1956) published a survey of the fauna from the Suwannee River west to the Escambia River. Umbilicus narrow (Figs. Spiral or costate sculpture usually present. Aperture never with a septum. 12). The LIOPLACINAE is endemic and include Campeloma, Lioplax, and Tulotoma. Amnicola dalli. Length of shell 2.0-2.5 mm (Fig. Thick-lipped Rams-horn (Thompson, 1968). (Fmr.) 111). Primarily parthenogenetic; females viviparous with young snails in a brood pouch in nape. Campeloma floridense (Sowerby, 1878). 39). We Floridians have so much to be proud of. The specie prefer quite clear water, of lakes and backwaters of streams andsprings. Elimia buffyae Aperture free from, or only in slight contact with, preceding whorl. 83). However, formalin is an excellent fixative for short-term preservation. Newborn shells brown. This pest remains a threat in Florida, Hawaii and the Caribbean. Walker, B. Thompson, F. G. & R. Hershler. It is hoped that this manual will stimulate other biologists to contribute to our knowledge of freshwater mollusks. Floridobia is known from peninsular Florida north along the Atlantic seaboard to Maine. Shell dark brown. It was well received, and it served the interests and needs of many people. Shell glossy. (Pilsbry and Johnson, 1903). Umbilicus wide (Fig. Shell with a brownish hue. Malacological Review, 12: 87-88. (Walker, 1905). This is particularly so in the Pulmonata. (Frauenfeld, 1863). Armored Siltsnail Mimic Pondsnail (Thompson, 1968). Teardrop Snail 16, 29). Shell globose or tear-shaped. The Snail Kite uses its slender, curved bill to extract its primary prey, the apple snail, from its shell. Aperture large, oval, much more than half the length of shell. (Mller, 1774). (Lea, 1834). Spire depressed, much less than height of aperture, occasionally planular (Figs. 4). Body whorl strongly keeled as though pinched at the periphery (Figs. (Fig.114). 80). It matters not that the specimens are stored in 70 percent alcohol after having been fixed in formalin. (Mihalcik & Thompson, 2002). Incremental striations uniformly weak. Elimia floridensis Shell relatively thin. A press release sent from FDACS said that a gastropod enthusiast in Coconut Grove discovered the snail and sent it to the University of Florida for identification. 34, 35). The profile of the whorls and their comparative size can also help determine the species. Adults 9-15 mm wide (Figs. Vernacular names are given only for species. 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. Operculum paucispiral, with about three rapidly expanding whorls (Fig. Arboreal forms, such as Liguus of Florida and Cuba, tend to be brightly coloured; terrestrial forms usually are drab. Size: 2-4 cm. Attains a length of about 30-36 mm (Figs. Few of the North American species have been studied to the extent that their taxonomy, geographic distributions, life histories, and ecology are documented. Identifications are difficult in many instances without properly preserved specimens. Identification should conform with all data in the key and with geographic distributions. Shell with 3-4 whorls. Laevapex fuscus 5: 1-140. Shell larger, 2.8-4.6 mm long; adults with 4.0-4.9 whorls; spire longer, 0.9-1.3 times height of aperture; superior tubercles not arranged in oblique longitudinal series. 113). These are white, which is the more prized color in. 180-193). 127); superior tubercles on penis arranged in oblique longitudinal series. This is essential in the case of the Hydrobiidae. The shell are secondarily useful for identification, but only when supplemented with anatomical information. Bulletin of the Museum of Comparative Zoology, 129: 401-61. Its brown spotted exterior provides camouflage, making it a challenge to spot. Video. Ph.D. thesis, University of Michigan, i-xii, 1-324. Pilsbry, H. A. 15). Being nocturnal, these pests aren't always feeding when you're scouting. Littoridinops monroensis 1982. Outer lip straightened just below shoulder; straightened portion lying at an angle to axis of shell (Figs. The following shells are commonly found on Florida's beaches. 1934. Review of the Planorbidae of Florida with notes on other members of the family. (Clench & Turner, 1956). Bugle Sprite 198, 205). Slender Walker Shell smooth. Penis with large a terminal lobe on the left side and a smaller appendix-like flagellum on the right side. Seminole Siltsnail Giant African snails can lead to giant problems. 1, 2). Columellar margin of aperture very thick but not reflected over umbilical area (Fig.103). 2015; Agudo-Padron 2018). 131). Aperture elliptical and loosely attached to or slightly separated from preceding whorl; 4.5-4.9 whorls. Penis with 2 or 3 papillae on left margin (Fig. Peristome ovate to subcircular. Amphibious; moves by step-like mode of progression (Fig. Malacologia, 23: 81-82. Thiarids are found in tropical and subtropical regions of the world. Since then a great amount of fieldwork has taken place throughout Florida, and many additions to the fauna have come to light. They are most common on tropical islands but occur also in cold regions, where they hibernate. Aperture narrowly in contact or free from preceding whorl. 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. The Florida Department of Agriculture and Consumer . (Fig. 159-179). Floridobia wekiwae 70, 71). They were detected in 2011 in Miami-Dade County and eradicated again in 2021. 180-182). 3). U-shaped superior crest not enclosing longitudinal crests. Umbilical perforation wide, 1/6 to 1/8 diameter of shell. Pseudosuccinea columella The focus on most investigations was on rivers north of Florida, and little attention was given to the Florida fauna. 126); accessory crest present on penis. Crystal Siltsnail Peristome narrow to broadly ovate. 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. Nat. Micromenetus dilatatus avus (Pilsbry, 1905). Common name: Florida applesnail Taxonomy: available through Identification: This species is the largest freshwater gastropod native to North America (Burch 1982). The Pleuroceridae of the Atlantic Coastal Plain. Base of shell usually without spiral band. By 1973, more than 18,000 snails had been found and destroyed along with thousands of eggs, and the snail was . Shell sculptured with fine spiral threads. Penis with 5-15 papillae along right margin arranged in 1-2 rows (Fig. Rails, gallinules, coots and cranes. 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. Hershler, R. & F. G. Thompson. Clench, W.J. Penis as illustrated (Fig. Horse conch in mud Horse Conch snail The mature horse conch can be two feet long! 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. Columellar margin of aperture wide, flat-faced; apex of spire usually erroded; apical whorls, when present, with minute spiral striations; central tooth of radula with basocones located on ridged surface of tooth (Fig. Biomphalaria havanensis 112), occurs in the Ocmulgee River system in Georgia. By Ker Than for National Geographic News. Shell unicolor, with distinct vertical sculpture in addition to strong spiral sculpture. However, this appears to be an over reduction, and several southern species were synonymized that appear worthy of recognition. Whorls of spire less rounded. Indented Duskysnail (Fig. Shell planular or disc-shaped; spire flat when raised above succeeding whorls (Figs. (Lea, 1962). . Sculpture above periphery of whorls consisting of sharp spiral chords and distinct vertical ribs; shell attenuate. The radula is then thoroughly rinsed in distilled water, stained, and mounted on a microscope slide. 110). 51, 52). 159-196). In previous editions of the manual the Florida species were placed in the genus Physella. Earlier whorls of adult shell with vertical ribs and spiral chords. 67). Female shell about 4-6 mm long (Figs. Size small I I to medium, 8-12 mm in length. (Morelet, 1851). Base of shell with dark red spiral band. (C.B. Small- or medium-sized snails need to be identified with the aid of a binocular dissecting microscope that is equipped with an ocular micrometer calibrated to 0.1 mm accuracy so that precise measurements can be made. Mantle diffusely pigmented with melanophores (Fig. Malacological Review, Suppl. Nautilus, 97: 68-69. (Weatherby, 1879). This causes problems in species identification and yield an undermeasure of the actual number of species that exist in nature. A parasite that can cause fatal disease in people and animals has been detected in South Florida (South Florida Sun-Sentinel) A dangerous parasite found in the giant African land snails that. Typically, land snails live on or near the ground, feed on decaying plant matter, and lay their eggs in the soil. Penis with papillae along both margins, or right margin only (papillae absent in some Aphaostracon). Dasyscia franzi Penny Sprite) Micromenetus floridensis (Baker, 1945). Campeloma parthenum (Gastropoda: Viviparidae), a new species from north Florida. 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. Hydrobiids are small- to medium-sized operculate snails that live primarily in brackish and fresh water. The reappearance of an invasive snail species forced state officials to enact a quarantine order two weeks ago for residents of Florida's Pasco County, an area north of Tampa along the gulf. Spiketopped Applesnail Many species are secondarily modified to appear right-handed or pseudo-dextral (FIGS. Shell usually marked with red or rust-colored spots, flames, or bands (most apparent on juvenile specimens). Base of shell regularly expanding, not funnel-shaped. Conical with relatively obese whorls. 1979b. Malacological Review, 12: 41-49. (Fig. Clifton Spring Hydrobe (Aguayo, 1935). Aperture rhomboid; baso-columellar angle extended as slight tonguelike projection; basal lip broadly but shallowly indented (Fig. Sculptured with regularly spaced, fine, incremental threads and spiral striations; spiral striations evident only on base of whorls in some specimens. Aperture relatively shorter, about half or less the length of the shell. Micromenetus brogniartiana 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. Numerous species of exotic snails are serious pests of plants and threats to public health.

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