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. Freshwater snails (Mollusca: Gastropoda) of North America. Apex nearly straight-sided or concave in outline. Shell conical to ovate-conical. Operculum nearly multispiral with four large, slowly expanding whorls (Fig. Color often glossy reddish brown. Serrated Crownsnail Shell unicolor brown, never mottled with reddish spots. Aperture broadly elliptical. Shell conical or cylindric-conical. Dusky Ancylid Spire depressed, much less than height of aperture, occasionally planular (Figs. The aquatic snails of the Family Hydrobiidae of peninsular Florida. Shell light brown and frequently mottled with rust-colored spots that may form a spiral row below the suture. Biomphalaria havanensis Shell usually planispiral, but two species may have a flat-topped, elevated spire. Newborn shells white. (Thompson, 1968). 32). (Vanatta, 1935). Florida Cone (Family) Conidae Distinguishing Characteristics: The Cones are easily identified by the distinctive cone-like shape and a long aperture that reaches up to their shoulder. Sexes strongly dimorphic in size, males about half as long as females. The radula can be studied by dissecting out the buccal mass and macerating it in clorox or sodium hydroxide. Length of shell 2.0-2.4 mm (Fig. Radula with tricuspid lateral teeth (Fig. It contains about a dozen species in North America. Shell sculptured with prominent nodes overlapping suture and forming crenulations. Length of shell 2.2-2.6 mm (Fig. Aperture relatively shorter, about half or less the length of the shell. Aperture elliptical and usually attached to preceding whorl; 4.1-4.5 whorls present. 180-193). Floridobia porterae Shell usually small to medium (2-25 mm). Various species of Cipangopaludina also have been introduced from the Orient into North America. Outer lip of aperture nearly straight in lateral profile (Figs. Graphite Elimia 125); accessory crest absent on penis. Whorls of spire strongly arched or rounded. It was first identified in Florida by Dr. Harry G. Lee, who discovered the snail in Duval County in 2009. Shell with spiral chords or spirally arranged series of nodes. The radula is then thoroughly rinsed in distilled water, stained, and mounted on a microscope slide. Occasional Papers on Mollusks, 2: 385-412. Pomacea canaliculata This family includes four North American genera, Amnicola, Dasyscia, Colligyrus and Lyogyrus, and the European genus Marstoniopsis and some Asian genera. Umbilicus narrow, without a strong circum-umbilical ridge, outer lip without a callus on inner surface. 1956. Choctaw Lioplax Do not use tap water since copper ions from the plumbing system may contaminate the tap water and kill the snails prematurely. Laevapex peninsulas Shell usually squarish or rectangular in shape. (Thompson, 1968). Aperture narrow, about half as wide as high. CLICK ON EACH PHOTO Fallen Angel Wing -Atlantic Mud Piddock Boring Angel Wing- Striate Piddock Rice Olive Pilsbry, H. A. Minor spiral sculpture weak or absent. Spire short and compact, about 0.5-0.7 times height of aperture in mature specimens, proportionally longer in juveniles (Fig. Shell elongate. Interior of adult aperture with brownish tinge. (Lea, 1834). Medium- to large-sized tropical freshwater snails. 149). Shell minute, 2.4-2.7 mm long; adults with 3.9-4.2 whorls; spire short, 0.8- 1.1 times height of aperture (Fig. Rhapinema dacryon Shell coiled to the left, with the aperture on the left side (Figs.147-158). A preliminary revision of Florida Lioplax (Gastropoda: Viviparidae), with a description of Lioplax talquinensis n.sp. It is characterized by the lobed shape and glandular patterns of the penis. Adult shells about 40 70 mm high (Fig. Escambia Elimia Indented Duskysnail 60). 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. It is hoped that this manual will stimulate other biologists to contribute to our knowledge of freshwater mollusks. (Fig. The aquatic snail fauna of the southeastern United States has long been recognized for its richness and diversity. (Thompson, 1968). Clench, W.J., & S. L. H. Fuller. Spiral sculpture faint or absent (Figs. 17, 29-32), shell usually banded in Florida forms. Olive NeriteNeritina usnea(Reding, 1798). Goldenhorn Marisa It occurs in India, Sri Lanka, Bangladesh, Nepal, Pakistan and Brazil (Figure 1) (Raut and Ghose 1984; Biswas et al. (Thompson, 1968). Shell medium-sized or large; 5.4-7.5 mm long; thick and opaque; ovate or globose; apical whorls depressed; sides of spire rounded; body whorl conspicuously enlarged, ample, rapidly descending to aperture along last half whorl. 115, 116). (Say, 1817). Spire shorter, conical, 0.7-1.3 times length of aperture, nearly straight-sided in outline, suture of whorls weakly or moderately impressed. (Fig. Shell 2.8-3.7 mm long. (Thompson, 1968). It is most common in Southwest Florida, and northwest Florida. Malacological Review, 12: 87-88. Size: 2-4 cm. Planorbella scalaris Female adult snail kites have yellow or orange legs and ceres; and red or orangish-brown eyes. Interior of aperture livid white. Mantle richly marked with reddish-brown blotches and spots. 56). Inferior crest absent. Pomatiopsis lapidaria (Clench & Turner, 1956). Excentric Ancylid Burch, J.B. 1989. Base of last whorl with prominent spiral ridges. (Thompson, 1968). In some genera, eggs are deposited above the water in dry clusters on stems, trees, walls, etc. In others, some or all populations may be parthenogenetic, consisting only of females, or they may have a disproportionately small number of males. Shell with a brownish hue. Little is known about these animals, and diverse opinions exist as to how many species are recognizable. Basch (1963) recognized five valid species. Marginal teeth of radula spatulate and bearing 8-10 weakly differentiated cusps. The species of snail was present in Florida in the 1960s and 1970s before being eradicated in 1975, the FDACS said. Aperture widely separated from preceding whorl. The focus on most investigations was on rivers north of Florida, and little attention was given to the Florida fauna. Operculum loosely coiled, with 3.75 large whorls, the outer one expanding more rapidly than the others (Figs. 1963. Thompson, F.G. 1979. Littoridinops palustris Others were new taxa not found in earlier surveys. The sexes are separate and fertilization is internal (Andrews, 1964). Length of shell 3.0-4.0 mm (Fig. dalli 140). 38). Shell sculptured with very fine, uniformly spaced axial threads (Figs.168-170). The bulimulids of Florida have ovate-conical or bulimoid shells that at maturity range in size from 15 mm to 70 mm. Acad. 11). Blackwater Ancylid Slackwater Elimia 128). A giant African snail sighting in Florida enacted a quarantine over parasite concerns. Color uniform olive-green, never banded (Fig. (Lea, 1858). Florida authorities believe that the snail, native to eastern Africa, was reintroduced to the state when someone brought it home as a pet. Apex distinctly convex in outline. There is no consensus in systematic biology about how to treat these forms. Vernacular manes used in this manual are consistent with the standardized list of vernacular names for North American freshwater snails recently established by the American Fisheries Society (Turgeon, et al, 1998). Outer lip nearly straight and parallel to axis of shell in adults (Fig. Micromenetus brogniartiana Suture relatively deep, Whorls of spire rounded. 19-21). Spiral or costate sculpture usually present. 1, 2). (Thompson, 1968). Florida. Umbilicus wide (Fig. Body whorl angular. Shell sexually dimorphic in size, males about one-third as long as females. The reader may be troubled by the imprecise shell characteristics that are used in the key. Alexander Siltsnail 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. Adult shells about 40-60 mm high (Fig. (Mihalcik & Thompson, 2002). Shell transparent or translucent. Lobe and flagellum with various patterns of dermal glands (Fig. 3). Identify your shells using our popular photo guide to southwest Florida shells from Sanibel Island and beyond. (Thompson, 1969). This causes problems in species identification and yield an undermeasure of the actual number of species that exist in nature. Central tooth of radula with basocones located on fore or lateral wing of tooth (Figs. Shape highly variable, usually disc-shaped but some specimens with flat-topped raised spire. Lower margin of aperture not advanced beyond upper margin. This manual recognizes 113 species and subspecies that occurring in Florida and the list will increase with time. Aquatic; moves by gliding motion. Shell ovate in shape, about 1.2-1.5 times as high as wide. Embryonic shell with a strong peripheral spiral chord that continues onto following whorls (Fig. The primary differences between the two families are based on soft anatomy. Height of shell about 14-16 mm; width, 10-12 mm (Figs. (Lea, 1842). Thompson, F.G. 1968. Average length about 5.5 mm (Figs. Apex of shell flat, though it may be raised above the periphery of the last whorl (Figs. There is much disagreement as to how many species actually exist. Mesa Rams-horn Their siphonal canal is merged with their aperture and called a "siphonal notch". Floridobia ponderosa All freshwater limpets in the southeast belong to this family. 119). Penis filament white. Channeled Applesnail 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. 173). (Conrad, 1834). Shell rounded at the periphery (Figs. Te, G.A. 70, 71). Blue Spring Hydrobe Apex behind center of shell. Floridobia fraterna State officials said the last live snail found in Florida before the Pasco . This study was a landmark contribution to the malacology of the southeast, and it summarized the known fauna of western Florida. Umbilicus variable. Our beaches often rank at or near the top in the world. Shell unicolor, never banded. 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. 169). They achieve their greatest diversity in genera and species in temperate North America. Whorls straight-sided, not scalariform; suture hardly distinct; aperture terminating at periphery of last whorl; vertical ribs weaker and closely spaced; adult size about 25-30 mm long (Fig. (Lea, 1862). The horntail . Female shell about 3.5-4.0 mm long (Fig. After the shells are thoroughly rinsed, they can be air-dried in cardboard trays. Adults with about 5 whorls, and 10-13 mm wide (Figs.177-179). Hyacinth Siltsnail) Floridobia floridana (Frauenfeld, 1863). It wasn't until 2021 the population was. Shell smooth. Shell medium to large (12-75 mm). Aperture usually open; occasionally with a horizontal, shelf-like septum closing posterior part (Fig. Aphaostracon hypohyalina 33); males without copulatory structures. Shell conical or cylindrical-conical in shape; spire elevated; body whorl not disproportionately voluminous; umbilicus closed or open. Nuclear whorl 0.29-0.33 mm in diameter. As a result . Cockscomb Hydrobe Shell specimens should be cleaned and air-dried. Hatia pomilia hendersoni Shell coiled to the right, with the aperture on the right side (Figs. Alligator Siltsnail Nautilus, 83: 72. 82). Thompson, F. G. 2000. The living snail is bright orange. (Lea, 1838). Body whorl relatively rapidly expanding in diameter (Fig. Elimia floridensis ssp. Lip of adult shell usually with a thick crest externally and an internal callus. 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. This is not the first time Florida has dealt with an invasion of giant snails. Proc. They are variable in their shell characteristics, and some samples may be difficult to identify. Texture dull. 1918. 105, 106). Nautilus, 19: 34. The giant African snails detected in New Port Richey, Florida are unrelated to the population of giant African snails eradicated from Broward and Miami Dade counties last year. Many North American snail species were described near the turn of the century by Walker (1918). Floridobia leptospira Shell usually large, about 12-16 mm long. Univ. Regal Hydrobe Columellar margin of aperture very thick but not reflected over umbilical area (Fig.103). 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. Miscellaneous Publication of the Museum of Zoology, University of Michigan, 6: 1-213. 65). Two-ridged Rams-horn Dipping them in a dilute solution of oxalic acid and gently scrubbing them with a fine brush can clean such specimens. 141). It also was the first adequately illustrated faunal summary published on the Southeast. 2015; Jayashankar et al. Jan. 28, 2020 . Fortunately in Florida, the species are relatively easy to distinguish. Paper fig A Florida Gulf Coast specialty shell! Browse and enjoy! Haitia cubensis Base of shell open when viewed from below, showing most of preceding whorl due to curved basal lip (Fig. Ferrissia is widely distributed in the northern hemisphere. Size small, discoidal, adults seldom exceeding 4 mm in width. Shell usually with raised spiral threads around periphery, frequently the uppermost thread has conical or triangular spines (Figs. Campeloma geniculum Additional genera occur in the Orient, Southeast Asia, Africa, and South America. October 14, 2021 7:00 am. On June 24th the Florida Department of Agriculture and Consumer Services (FDACS) created a quarantine surrounding the town of New Port Richey. The Florida Department . It was well received, and it served the interests and needs of many people. Dasyscia franzi Spire of adults without distinct vertical ribs. Papilla with a duct that leads to a blind caecum in nape of snail. In Florida four types of Campeloma have been recognized. Aperture moderately oblique. 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. Penis with 4-6 papillae along right margin (Fig. 34); penis frlattened, blade-like (Fig. 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). Thiarids are found in tropical and subtropical regions of the world. Spiral sculpture absent. Somatogyrus is distributed from the Mississippi River drainage system east to Atlantic coastal streams, and south to the Gulf coastal drainage systems. The most recent sighting of a giant African land snail took place in 2017, meaning the species can now be considered eradicated in the state of Florida. A little practice may be necessary to perfect this relaxing procedure. Since then a great amount of fieldwork has taken place throughout Florida, and many additions to the fauna have come to light. Introduction to the Physidae (Gastropoda, Hydophila): biogeograhy, classification, morphology. A giant African land snail, photographed at a lab in 2014. Mihalcik, E. L. & F. G. Thompson. Euglandina rosea, the rosy wolfsnail or cannibal snail, is a species of medium-sized to large predatory air-breathing land snail, a carnivorous terrestrial pulmonate gastropod mollusk in the family Spiraxidae.. Shell conical, spire moderatly high. (Mller, 1774). 98). Nuclear whorl 0.41 mm in diameter transverse to initial suture. Some were range extensions for species known to occur in adjacent areas. 45). 60). Lymnaeids are a nearly cosmopolitan family of freshwater snails. Suture relatively shallow. The following key includes all of the species that occur in Florida and some that occur in Alabama, Georgia, and South Carolina. Flatwood siltsnail Apex less than 0.4 times length of shell. Creek Siltsnail Mantle mottled with black spots and blotches. Taylor recognizes twenty-three genera based on the soft anatomy. Smooth-ribbed Hydrobe Subspecies bear the same name as the nominate subspecies, as is consistent with the standard used by the American Fisheries Society for fishes, and by other societies for other classes of animals. Shell moderately elevated, over 0.25 times as high as long. Numerous species of exotic snails are serious pests of plants and threats to public health. Knobby Elimia (Pilsbry and Johnson, 1903). Shell about 0.38-0.41 times as wide as high and about 20-27 mm long. Aperture comma-shaped, tightly appressed against preceding whorl. This will lead you to the final choice which identifies the snail. Rather stocky, adult about 15-20 mm long (Fig. Identification. Adults 9-15 mm wide (Figs.
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