More data based on many population samples from throughout this range will be necessary before the validity of the three forms can be determined. Mihalcik, E. L. & F. G. Thompson. Shell with strong vertical ribs on spire; spiral chords vestigial, confined to spiral series of knobs on top of vertical ribs; adults small, about 13-16 mm long (Fig. 137, 139). (Fig. Shell smaller, generally less than 12 mm long. Shell with three whorls. Mantle diffusely pigmented or unpigmented. (Jay, 1839). Baker, F.C. 159-179). Spire usually about equal to or greater than height of aperture (Figs. Brown garden snail, Cornu aspersa (formerly Helix aspersa, Cantareus aspersus, and Cryptomphalus aspersus) is a member of the family Helicidae.This snail species originates from Britain, western Europe, and along borders of the Mediterranean and Black Seas. Outer lip straightened just below shoulder; straightened portion lying at an angle to axis of shell (Figs. Suwannee Hydrobe It was well received, and it served the interests and needs of many people. 145). The following key is modified from Basch (1963). After a few years in storage glandular tissues in the female reproductive system deteriorate, and the process gradually spreads to destroy all but the terminal genital structures. Shell with darker colored spiral chords that may be smooth or wavy. 83). Nautilus, 19: 34. Shell nearly smooth, sculptured with irregular growth striations. (Fig. Operculum with about 3 whorls (Fig. The bulimulids of Florida have ovate-conical or bulimoid shells that at maturity range in size from 15 mm to 70 mm. Penis filament white. Three new freshwater snails of the genus Cincinnatia from peninsular Florida. Never preserve shell specimens in formalin. Whorls shouldered above near suture (Fig. Shell elliptical-ovate in shape. Shell more slender, about 0.30-0.35 times as wide as high. (Walker, 1908). The molluscan family Planorbidae. Length of shell 2.0-2.5 mm (Fig. 34, 35). 16, 25, 28). Average length about 4 mm (Figs. Parapical crest of verge greatly enlarged. Attains a length of about 30-36 mm (Figs. Suture deeply impressed. Philadelphia, 134: 143-77. It is believed the snail was introduced via the railway cars coming from Mexico. 1956. (Call, 1886). It could take years to fully rid the state of the species, officials say. Shell shaggy with numerous spiral fimbriations that are broken into synchronized tufts. It is characterized by the lobed shape and glandular patterns of the penis. Shell larger, reaching a maximum diameter of 18 mm. (Thompson, 1968). 54). Florida's Department of Agriculture and Consumer Services said that a Pasco County master gardener reported seeing a giant African land snail in the New Port Richey area on June 23. (Haldeman, 1841). The best times to look for shells are after a high tide, after a storm, in the morning, and during the winter months. Squaremouth Amnicola Those available covered only part of the state or part of the fauna. Hyacinth Siltsnail) Floridobia floridana (Frauenfeld, 1863). 10). 101). Is non-native to the area, in our case northwest Florida Planorbid snails are restricted to fresh water and occur worldwide, being found on all continental landmasses and many oceanic islands. Gulf Coast Pebblesnail) Somatogyrus walkerianus (Aldrich, 1905). Micromenetus d. dilatus Texture dull. Shell more slender and attenuate; spire more elongate in adults, about 0.7- 1.0 times height of aperture. Introduction to the Physidae (Gastropoda, Hydophila): biogeograhy, classification, morphology. (Thompson, 1968). 1979a. 204-207), often eroded in older specimens. Aquatic; moves by gliding motion. Numerous species of exotic snails are serious pests of plants and threats to public health. Shell keeled or strongly angular at the periphery (Figs. Umbilicus open. Shell usually corpulent, brown or green, generally opaque, but occasionally translucent in juveniles. Sculpture above periphery of whorls consisting of nodes arranged in vertical and spiral rows. A giant African snail sighting in Florida enacted a quarantine over parasite concerns. After the snails have been in the fixative for a few minutes to several hours, depending upon their sizes, they should be rinsed in water and transferred to 70 percent ethyl alcohol. Aperture broadly attached to preceding whorl across parietal wall. This is essential in the case of the Hydrobiidae. Rails, gallinules, coots and cranes. Choctaw Lioplax Weak spiral striations present on top of growth striations (Figs. 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. (Say, 1825). This revision follows the classification proposed by Taylor. 15). Apex flat with narrow threadlike keel. Teardrop Snail 55). A giant African land snail, photographed at a lab in 2014. 1, 2). Purple-throated Campeloma 141). Medium- to large-sized tropical freshwater snails. Sculpture consisting of axial striations only (Fig.147). The coloring makes state officials. Whorls of spire pointed and scalariform (steplike with nearly flat shoulders and deep sutures). Ferrissia hendersoni Escambia Elimia 91). Formalin does not even serve as a good fixative or preservative for long-term anatomical studies. Whorls 3.0-4.0. 68); lobe and flagellum with various patterns of dermal glands; central tooth of radula with basocones located on reflected margin of tooth (Fig. Campeloma geniculum (Conrad, 1834) is readily recognized by its obese, solid shell; it usually has a normal proportion of males in its populations, although some populations are apomictic parthenogens. Two subfamilies occur in North America. (Thompson, 1968). U.S. Florida Invasive species. Whorls rounded, not carinate above; occasionally angular below. 82). On June 24th the Florida Department of Agriculture and Consumer Services (FDACS) created a quarantine surrounding the town of New Port Richey. Shell dark brown. 80). Apex less than 0.4 times length of shell. shell with 3.9-4.2 whorls (Fig. Whorls generally arched. Maiden Campeloma (Thompson, 1969). Outer lip of aperture nearly straight in lateral profile (Figs. Aperture elliptical and usually attached to preceding whorl; 4.1-4.5 whorls present. Identifications are difficult in many instances without properly preserved specimens. 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. The greatest diversity of genera and species is in the Indo-Australian region. Penis with 3 papillae along right margin (Fig. 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. Shell sculptured with prominent nodes overlapping suture and forming crenulations. Rock Fossaria 115a, 115b). Cymbal Ancylid Vertical sculpture reduced to irregularly spaced and uneven growth striations or low undulating ribs. Vertical ribs smooth along the periphery, strongly developed (Fig. 7-9). Ghost Rams-horn 135). Fortunately in Florida, the species are relatively easy to distinguish. 36); males with a copulatory appendage, a penis (Fig. Aphaostracon rhadinus Last whorl not shouldered (Figs.155, 156). Shell sculpture with incremental striations only. 199). 1991. The shells should be rinsed frequently in tap water during the cleaning process to prevent etching by the acid. The family contains numerous genera and species, some of which are important medically as intermediate hosts for trematode parasites. Another variety, with cream-colored flesh and mottled brown shells, was detected in 2022. Credit: Craig Pittman. Sculpture consisting of fine incremental threads, and spiral striations that may become obsolete at maturity. By Ker Than for National Geographic News. Littoridinops palustris 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. Shell coiled to the left, with the aperture on the left side (Figs.147-158). Vertical ribs smooth along the periphery, strongly developed (Fig. Three occur in Florida. 1978. Umbilicus wide (Fig. Aperture enlarged (dilated). They can also carry rat lungworm, which causes meningitis in humans. Outer lip straight in lateral profiles. 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! Shell with a brownish hue. Shell slender, attenuate. Most snails will have a conical shaped shell. The giant African land snail is back in Florida after having been declared eradicated twice. Click on the link in the row that best matches your snail. dalli Color of fresh shell never milky white. Some hydrobiid snails from Georgia and Florida. Hershler, R. & F. G. Thompson. The horntail . Length of shell 2.0-2.4 mm (Fig. Other families occur elsewhere in North America and in other continents. (Pfeiffer, 1839). (Say, 1829). Florida Shell Guide. J. Clench and Ruth P. Turner (1956) published a survey of the fauna from the Suwannee River west to the Escambia River. Occasional Papers on Mollusks, 2: 385-412. 51, 52). Central tooth of radula with long basocones along base (Fig. Shell transparent or translucent. Burch, J. It is represented in North America by Viviparus. 113). It is essential that clean specimens be examined under proper lighting to observe diagnostic sculpture characteristics. Creek Siltsnail The family attains its greatest diversity in Southeast Asia. This is particularly so in the Pulmonata. Cockscomb Hydrobe (Clench, 1925). 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. 111). Aperture terminating below periphery of body whorl. Shell thick and solid; whorls weakly convex or flattened (Figs. 112), occurs in the Ocmulgee River system in Georgia. Bantam Hydrobe Pomatiopsis lapidaria Suture simple, not crenulated. The systematic relationships of the hydrobiid snail genus Nymphophilus Taylor, 1966 and the status of the Subfamily Nymphophilinae. NERITIDAE Horse conch in mud Horse Conch snail The mature horse conch can be two feet long! Shell medium-sized, 3.0-3.8 mm long; thinner, translucent or transparent in life; tear-shaped; spire raised and nearly straight-sided, pointed; body whorl less conspicuously enlarged, not descending to aperture along last half whorl. Live field samples should be divided into two groups, one to be preserved for shells, the other to be preserved for anatomical specimens. 197-209). When trying to identify the type of snail, the easiest method is to check it out closely. 159-161). Vertical ribs relatively strong and more widely spaced. (Linnaeus, 1758). Apex with fine radial striations (Figs. Columellar margin of aperture very thick but not reflected over umbilical area (Fig.103). Penis with 17-50 papillae along right margin arranged in 3-5 rows (Fig. Florida Museum of Natural History Floridobia mica Columellart margin of aperture not flat-faced; apex of shell usually entire; penis with large terminal lobe on left side and small appendage-like flagellum on right margin (Fig. (Fig. Few of the North American species have been studied to the extent that their taxonomy, geographic distributions, life histories, and ecology are documented.
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