Aphaostracon pycnus 110, 111, 68). Mantle mottled with black spots and blotches. (Fig. Transparent white (Fig. Umbilicus open, although very narrow in some species; occasionally closed. 89). Curator of Malacology. Low-dome Physa The fixative may damage the shell, but that is unimportant for anatomical purposes. Enterprise Siltsnail) Floridobia monroensis (Dall, 1885). Planorbula armigera wheatleyi Two subfamilies occur in North America. Adult shells about 40-60 mm high (Fig. Freemouth Hydrobe (Reeve, 1856). It was first identified in Florida by Dr. Harry G. Lee, who discovered the snail in Duval County in 2009. Shell sexually dimorphic in size, males about one-third as long as females. Maiden Campeloma Giant invasive snail sends one Florida county into quarantine Mesa Rams-horn The sexes are separate and fertilization is internal (Andrews, 1964). (Mller, 1774). (Thompson, 1968). GAINESVILLE, Fla., Feb. 26 (UPI) -- University of Florida researchers have confirmed the presence of a deadly parasite in three non-native species of snails that have colonized South Florida. 101). Size small I I to medium, 8-12 mm in length. Shell usually large, about 12-16 mm long. It was well received, and it served the interests and needs of many people. Biomphalaria havanensis Video. The profile of the whorls and their comparative size can also help determine the species. Invasive giant African land snail found in Florida can carry meningitis Blue Spring Hydrobe Arboreal forms, such as Liguus of Florida and Cuba, tend to be brightly coloured; terrestrial forms usually are drab. Bulletin of the Museum of Comparative Zoology, 129: 401-61. Shell planular or disc-shaped; spire flat when raised above succeeding whorls (Figs. 118). (Thompson, 1968). Minor spiral sculpture weak or absent. 76). (Pilsbry and Johnson, 1903). Taylor recognizes twenty-three genera based on the soft anatomy. Critical Florida references are Thompson 1968, 1969, 2000; Thompson and Hershler, 1991, and Hershler and Thompson, 1992. 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. Sides of spire concave in outline (Fig. Identification KeysThese files are all keys for the identification of various kinds of organisms. Aphaostracon chalarogyrus 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. 32). Proc. The Pleuroceridae of the Atlantic Coastal Plain. This family contains twelve genera in North America. Incremental striations intensified near nucleus and umbilicus. 59). Little is known about these animals, and diverse opinions exist as to how many species are recognizable. Various species of Cipangopaludina also have been introduced from the Orient into North America. Fossaria cubensis Penis filament black. 174-176). 12). Your choice will lead you to the proper identification of your snail or the next appropriate pair of questions. Shell elongate conical, spire high. Other species deposit eggs during the period of March through May, at which time the adults die and immature forms dominate the population through August or September. 16 Different Types of Snails: Ultimate Guide (With Pictures) Shell conical; thin and transparent; 4.0-4.5 strongly arched whorls. Penis with superior tubercles forming a vague broken loop; invaginated cave-like pit absent. Peristome incomplete around aperture. 69, 70). It wasn't until 2021 the population was. Snails on corn. Mantle cavity with gill on dorsal surface. 7-9). 116a, 116b). Operculum with about 3 whorls (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. This is particularly so in the Pulmonata. Body whorl relatively rapidly expanding in diameter (Fig. Proceedings of the Academy of Natural Sciences of Philadelphia, 86: 29-66. (Fmr.) Giant Snails Take Over Florida's Gulf Coast Again - Smithsonian Magazine Aperture usually open; occasionally with a horizontal, shelf-like septum closing posterior part (Fig. 111). Many have been synonymized, some undeservingly so. Operculum calcareous with two pegs on inner surface (Figs. Average length about 4 mm (Figs. 120). 75, 76). 1992. Penny Sprite) Micromenetus floridensis (Baker, 1945). Many North American snail species were described near the turn of the century by Walker (1918). Two, Melanoides tuberculata and Tarebia granifera, are medically important because they can serve as first intermediate host for the human lung fluke, Paragonimus westermani. Gray to brownish-yellow in color. The snails remain a threat in Hawaii and the Caribbean after their eradication in Florida in 2021. (Reeve, 1860). Work through the questions, each time choosing the characteristic that best matches your snail from the two choices. Shell cylindric-conical, solid opaque; 4.5-4.9 moderately rounded whorls. Biochemical studies show that in Elimia shell characters are conservative indicators of genetic divergence (Mihalcik & Thompson, 2002). Florida town quarantined after discovery of a giant African land snail Shell relatively thin. (Haldeman, 1841). Shell sculptured with vertical, weakly curved ribs and much finer spiral striations. i-xxxvi, 1-530 pls. Length of shell 2.0-2.4 mm (Fig. Length of shell 3.0-4.0 mm (Fig. Sculpture variable. Clench, W.J. Shell with prominent ribs and spiral chords on all whorls. Squaremouth Amnicola Shell sculptured with very fine, uniformly spaced axial threads (Figs.168-170). Numerous species of exotic snails are serious pests of plants and threats to public health. . Whorls shouldered above near suture (Fig. Over 500 species of Elimia have been described, most on the basis of shell characters. Shell smaller, reaching a maximum diameter of 13 mm. One species, C. chinensis malleatus (Reeve, 1863) (Fig. This will lead you to the final choice which identifies the snail. Smooth-ribbed Hydrobe Hood Ancylid Ovate Campeloma Shell very thin, fragile, transparent. The following key is modified from Basch (1963). The planorbid fauna of the southeastern states is particularly poorly known. Live snails for shell studies should be preserved in 70 percent alcohol. Giant snails that can cause meningitis found in Florida - WESH The family contains many genera and numerous species in South America, Central America, Mexico, Africa, and Southeast Asia. Shell coiled to the right, with the aperture on the right side (Figs. Size smaller than last species, seldom exceeding 10 mm in width (Figs.194-196). 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. 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. 34); penis frlattened, blade-like (Fig. Indented Duskysnail Thin and translucent or transparent. Shaggy Ghostsnail Primarily parthenogenetic; females viviparous with young snails in a brood pouch in nape. Haitia pomilia pomilia Florida Horse Conch ( Triplofusus giganteus) is the largest snail in North America and is Florida's state shell. Shell unicolor, never banded. 24, 27). For the purpose of completeness, the three parthenogenetic forms and C. geniculum are included in the key. Whorls of spire pointed and scalariform (steplike with nearly flat shoulders and deep sutures). Hershler, R. & F. G. Thompson. Shell conical or cylindric-conical. Peristome narrow to broadly ovate. Spire of adults with heavy vertical ribs; unicolor dark brown; usually less than 18 mm long (Figs. 164, 167). 47). Plane of aperture nearly vertical when viewed from the side. Spiketopped Applesnail (Linnaeus, 1758). Invasive snails that already cost FL $24 million are - Florida Phoenix It is characterized by the lobed shape and glandular patterns of the penis. Gainesville, Florida 32611-7800. Shell sculptured with fine spiral striations, and in some cases curved axial ribs. The shell are secondarily useful for identification, but only when supplemented with anatomical information. 10). Mantle richly marked with reddish-brown blotches and spots. The specie prefer quite clear water, of lakes and backwaters of streams andsprings. 200, 206). Penis with large a terminal lobe on the left side and a smaller appendix-like flagellum on the right side. One to several dark growth-rest varixes usually present on last whorl. Shell elongate-conical; 10-40 mm long in adult specimens; apex of spire usually eroded; shell with 8-12 whorls although eroded specimens may have fewer; shell usually strongly sculptured with spiral and/or vertical ribs and threads (except in Elimia dickinsoni); central tooth of radula without basal or lateral cusps (Fig. MIAMI-DADE, Fla. As if 2020 did not have enough surprises and curveballs, an invasive snail located in the U.S. for the first time was discovered in-- you guessed it, Florida. Choctaw Lioplax Aperture relatively ample (Figs. Widely umbilicate. On June 24th the Florida Department of Agriculture and Consumer Services (FDACS) created a quarantine surrounding the town of New Port Richey. Banded Mysterysnail Each snail has both female and male reproductive organs, so they can reproduce rapidly. Females with an egg-laying groove or sinus on right side of foot; eggs deposited on substrate. NERITIDAE 48). Suture deeply impressed. 69). Medium- to large-sized tropical freshwater snails. 1, 2). Snail Kite: Species Profile - National Park Service Columellar margin of aperture very thick but not reflected over umbilical area (Fig.103). Shell with 5.6-6.8 whorls; about 3.2-4.5 mm long (Fig. Some species that are endemic to Florida springs live in environments with nearly constant temperatures and apparently reproduce continuously throughout the year. Throughout the 19th and 20th Centuries malacologists made frequent field trips to explore river systems that were poorly known, and to revisit others that were renown for their rich and unique assemblages of species. Outer lip straightened just below shoulder; straightened portion lying at an angle to axis of shell (Figs. Females ovoviviparous or oviparous. Contents 1 Shell description 2 Distribution 3 Ecology 4 References 5 Further reading Shell description [ edit] Five views of a shell of Pomacea paludosa A review of the recent freshwater limpet snails of North America. Snails and Slugs - Gardening Solutions - University of Florida 1934. Review of the Planorbidae of Florida with notes on other members of the family. Umbilicus closed or narrowly perforate. It is represented in North America by Viviparus. (Lea, 1962). Length of shell 2.2-2.6 mm (Fig. Aperture widely separated from preceding whorl. Freshwater snails (Mollusca: Gastropoda) of North America. Introduction to the Physidae (Gastropoda, Hydophila): biogeograhy, classification, morphology. Color of fresh shell never milky white. Shell moderately elevated, over 0.25 times as high as long. Fenney Spring Hydrobe Types of Shells In Florida: Seashell Identification Guide It lurks nearly a foot beneath the dunes of Sanibel Island. (Thompson, 1968). In 1976 in the St. Johns River 1 found Melanoides tuberculatus with population densities of 10,000/m2. 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. Shell smooth. Penis without a conspicuously enlarged papilla near right base, although other papillae usually are present. Peristome complete around aperture. The number of subfanilies recognized in the Hydrobiida is unsettled. Peristome ovate to subcircular. (Sowerby, 1878). Adult shell about 4-5 mm high; umbilicus wide; columellar margin of the aperture concave in outline (Fig. Last whorl of adult shell smooth or with growth striations, but not with ribs and spiral chords. Radula with bicuspid lateral teeth (Fig. This is essential in the case of the Hydrobiidae. It occurs in India, Sri Lanka, Bangladesh, Nepal, Pakistan and Brazil (Figure 1) (Raut and Ghose 1984; Biswas et al. (Gould, 1841). (Thompson, 2000). (Pfeiffer, 1839). Female oviparous, never with embryos in uterus. Marsh Sprite 36). Sides of spire straight-sided in outline. Choctawhatchee Pebblesnail) Somatogyrus sp. A single species consisting of two highly variable subspecies occurs in Florida. Excentric Ancylid Body whorl compressed (Fig. 2015; Jayashankar et al. Umbilicus wide (Fig. Additional genera occur in the Orient, Southeast Asia, Africa, and South America. Suture relatively deep, Whorls of spire rounded. Campeloma parthenum (Gastropoda: Viviparidae), a new species from north Florida. Penis with a very long slender flagellum that extends beyond terminal lobe. Mantle diffusely pigmented with melanophores (Fig. Includes the limpkin, a Sunshine State specialty. Basal lip of peristome deeply receded. Thicker leaves may have damage on only one side. Do not use tap water since copper ions from the plumbing system may contaminate the tap water and kill the snails prematurely. When trying to identify the type of snail, the easiest method is to check it out closely. Whorls 3.8-4.3. Apex very obtuse, almost in the middle of the shell. Whorls generally arched. Basch (1963) recognized five valid species. The aquatic snails of the Family Hydrobiidae of peninsular Florida. Operculum constructed entirely of concentric rings (Fig. Aperture broadly in contact with preceding whorl. Helisoma anceps anceps Pomacea paludosa - Wikipedia 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 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. 23, 26). Opercula should be glued to cotton plugs and replaced within the aperture. Campeloma floridense Te, G.A. 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. 49, 50). Suture simple, not crenulated. Apex in the posterior right third, domelike and evenly rounded. (This character separates only the genera under consideration; genera from other areas of the world do not conform to this distinction.) Fossaria is found throughout North America, and in northern Europe. Penis with 7-50 papillae along right margin and 1-4 papillae along distal third of left margin (Figs. (Lea, 1842). A little practice may be necessary to perfect this relaxing procedure. Apex behind center of shell. Two-ridged Rams-horn 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. Females with live embryos in brood pouch in mantle; males with right eye stalk modified as a penis. Aphaostracon rhadinus Shell specimens should be cleaned and air-dried. 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). 22). The genus Viviparus (Viviparidae) in North America. Central tooth of radula with basocones located on fore or lateral wing of tooth (Figs. The island apple snail is the largest of the known species in Florida with shell sizes up to five inches in length. Radula with tricuspid lateral teeth (Fig. Mimic Pondsnail An invasive, giant African snail is back in Florida. A portion of one 53). Radial riblets on entire surface of shell except apex. Like. The bio-economic importance of snails to environmental issues has become increasingly relevant because of the impact that economic development has on Florida waterways. Generally with distinct axial and spiral striations. However, this appears to be an over reduction, and several southern species were synonymized that appear worthy of recognition. An invasive snail species known as the giant African land snail has officially been eradicated in the state of Florida after years of attempts and $24 million worth . Parietal margin of operculum concave (Fig. Vertical ribs strongly developed, crossed by nearly equal sized spiral threads that form low spines where they cross the ribs, adults about 20-25 mm long (Fig. Apex proportionally longer, about 0.3-0.5 times length of shell. 57). University of Florida Spire raised and flat-topped. Brownish-yellow in color (Fig. It became increasingly important to provide an identification manual of the freshwater snails of Florida for many reasons. Carib Fossaria Florida Land Snail Gallery - A Pictorial The last time anyone had seen a land snail in the Sunshine State was at the tail-end of a year-long, $23-million battle to eradicate the invasive species from South Florida in 2012. 208, 209), although radial striations may be present on other areas of shell. 145). Littoridinops palustris It is globose in shape, body whorls are wide, spire is depressed, and the aperature is narrowly oval (Burch 1982). Burch, J. Thick-lipped Rams-horn Umbilicus of shell closed. 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. Philadelphia, 134: 143-77. Fine vertical ribs present on uppermost whorls. More data based on many population samples from throughout this range will be necessary before the validity of the three forms can be determined. Sculpture above periphery of whorls consisting of nodes arranged in vertical and spiral rows. Quilted Melania Last whorl flattened above. Adults about 5 mm long (Figs. Aperture broadly attached to preceding whorl across parietal wall. Aperture ovate; broadly attached to preceding whorl. 51, 52). Gulf Coast Pebblesnail) Somatogyrus walkerianus (Aldrich, 1905). Parasite infecting Florida snails poses health danger - Phys.org Shell conical with strongly arched whorls and a deeply impressed suture. 16, 25, 28). Shell thin, fragile, very much depressed, less than 0.25 times as high as long. 171-173). 162). (Lamark, 1822). They can also carry rat lungworm, which causes meningitis in humans. Shell relatively thick (Figs. Hydrobiids are small- to medium-sized operculate snails that live primarily in brackish and fresh water. Thompson, F.G. 1979. Planorbid snails are restricted to fresh water and occur worldwide, being found on all continental landmasses and many oceanic islands. Pomacea canaliculata Penis filament white. Pest alert: Invasive horntail snail found for first time in South Florida (Couper, 1844). CLICK ON EACH PHOTO Fallen Angel Wing -Atlantic Mud Piddock Boring Angel Wing- Striate Piddock Rice Olive Surface smooth, glossy, striations when present very weak. Shell large, 80-100 mm wide. Shell obese and ponderous. Penis with invaginated cave-like pit within U-shaped superior tubercles. Ghost Rams-horn Operculum loosely coiled, with 3.75 large whorls, the outer one expanding more rapidly than the others (Figs. Adults with six teeth in aperture, two on the parietal wall and four on the palatal wall. Prominent vertical ribs on middle and upper whorls. Choctaw Lioplax Shell unicolor, with distinct vertical sculpture in addition to strong spiral sculpture. Shell cap-shaped or limpet-like with a wide, open aperture forming base of shell (Figs. Pilsbry, H. A. (Thompson, 1968). Base of shell regularly expanding, not funnel-shaped. 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. (Thompson, 2000). 60). Penis with 17-50 papillae along right margin arranged in 3-5 rows (Fig. Shell with a brownish hue. 75). The latter are placed in a small container filled with pond water. The radula is then thoroughly rinsed in distilled water, stained, and mounted on a microscope slide. Shell elongate-conical, with about 5-7 whorls. In previous editions of the manual species of Floridobia were placed in the genus Cincinnatia. Marginal teeth of radula spatulate and bearing 8-10 weakly differentiated cusps. Occasional Papers on Mollusks, 2: 385-412. The shells should be rinsed frequently in tap water during the cleaning process to prevent etching by the acid. 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. They are commonly found on live aquatic plant stems, dead leaves and sticks, and on bottles and cans. 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. Suture more deeply impressed than in 77a. Shell without conical spines, although spiral threads may be present. The state says a "gastropod enthusiast" collected unusual snails in the Coconut Grove area back in August. Another variety, with cream-colored flesh and mottled brown shells, was detected in 2022. Credit: Craig Pittman. Operculum spiral, consisting of two or more rapidly increasing whorls (Fig. 115, 116). 149). 173). Fortunately in Florida, the species are relatively easy to distinguish. Sculptured with regularly spaced, fine, incremental threads and spiral striations; spiral striations evident only on base of whorls in some specimens. Another giant African snail sighting forces Florida county into Female shell about 3.5-4.0 mm long (Fig. Carib Physa Moderately large, thick-shelled operculate snails. Penis as illustrated (Fig. 141). Dipping them in a dilute solution of oxalic acid and gently scrubbing them with a fine brush can clean such specimens. The snails are tan colored, high and conical, with mature snails about to 1-inch long. Incremental striations uniformly weak. Apex nearly straight-sided or concave in outline. Elimia annae Suture relatively shallow. Invasive snail that loves damaging plants, living in humidity found in Operculum neomelanian, with a small, rapidly expanding nucleus located near the basal margin (Fig. Rather stocky, adult about 15-20 mm long (Fig. It is essential that clean specimens be examined under proper lighting to observe diagnostic sculpture characteristics. The bodies of large snails, such as viviparids and pilids, should be pulled from the shell. Goblin Elimia) Elimia vanhyningiana (Goodrich, 1921). The species was eradicated again in 2021 after being detected in 2011 in Miami-Dade County, according to FDACS. Body whorl rounded (Fig. Shell subcircular, smooth, often encrusted with dark material. Tadpole Physa Aphaostracon hypohyalina Crystal Siltsnail Pseudotryonia brevissimus The snails can produce 1,200 eggs in a year and grow up to about the size of a human fist. Browse and enjoy! Embryonic shell smooth, without spiral chords (Fig. By Ker Than for National Geographic News. PDF Giant African Land Snail Identification Sheet - Florida Commissioner of Adult large, about 23-27 mm long (Figs. Penis with 3-7 papillae along right margin and a projection with 1-4 papillae near end on left side (Figs. Shell globose with a short depressed spire; body whorl ample; umbilicus closed. Thompson, F. G. 1997. 14), was introduced into a fishpond in St. Petersburg about 1921 and into lakes in Orlando about 1940. Umbilicus of shell perforated or broadly open. Clench, W.J., & R. D. Turner. Penis with papillae along right margin (Figs. Spire shorter, conical, 0.7-1.3 times length of aperture, nearly straight-sided in outline, suture of whorls weakly or moderately impressed. (Conrad, 1834). (Vanatta, 1934). Amnicola dalli. Evolution has occurred through reproductive specialization, with each genus and most species having distinctive patterns of dermal glands. The current status of these introductions is not known. Shell conical, olivaceous in color. 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. Inside of lip with or without a reddish callus but callus never dark red in color. Apex about 0.4-0.5 times length of shell. 38). 201, 207). It matters not that the specimens are stored in 70 percent alcohol after having been fixed in formalin. Florida Spent Over $24M Eradicating Invasive Snails That - Newsweek Narrowly umbilicate. There were no references to cover the entire state. Shell brightly banded and with large, wide and wavey vertical folds; robust, usually 21-25 mm long (Fig. Suture more deeply impressed. Shell elongate. Penis with papillae along both margins, or right margin only (papillae absent in some Aphaostracon). Shell elongate with pointed conical spire. Ancylid gastropods are small, fragile limpets found in most freshwater habitats. Spurwinkia: Morphology, systematics, and ecology of a new genus of North American marshland Hydrobiidae (Mollusca: Gastropoda). Newborn shells white. Penis with a large, blade-like flagellum with continuous heavy dermal glands along each side (Figs. These are white, which is the more prized color in. (Walker, 1925). 1945. 7-9). Shell nearly smooth, sculptured with irregularly spaced incremental striations (Figs. Aperture strongly oblique. Aperture non-operculate; mantle cavity modified into a lung. File Campeloma Dense Hydrobe 87). 36); males with a copulatory appendage, a penis (Fig. 3:51. Shell medium to large (12-75 mm). Shell nearly smooth, sculptured with irregular growth striations. 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 Color uniform olive-green, never banded (Fig. Tarebia granifera This study was a landmark contribution to the malacology of the southeast, and it summarized the known fauna of western Florida. Penis filament white. Giant Snails Invading Florida, "Major Threat" to Crops. (Jay, 1839). Aperture broadly elliptical. 1918. 136, 138). B. Shell cylindric-conical with 4.5-5.0 whorls. Outer lip straight in lateral profiles. Lioplax pilsbryi pilsbryi Viviparus intertextus The . 1905. Giant Snails Invading Florida, "Major Threat" to Crops Its brown spotted exterior provides camouflage, making it a challenge to spot. Approximately 35 species have been described. Few of the North American species have been studied to the extent that their taxonomy, geographic distributions, life histories, and ecology are documented. 162-164). Adults about 15-18 mm wide with about 5.5 whorls (Figs.183-185). Littoridinops tenuipes Aperture elliptical or trapezoidal in shape. Size small, discoidal, adults seldom exceeding 4 mm in width. Aperture free from, or only in slight contact with, preceding whorl. 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. 159-196). The Junonia is seldom found, and is considered a special find by beachcombers. Penis with a dense pattern of superior tubercles. Attains a length of 30-40 mm (Fig. Miscellaneous Publication of the Museum of Zoology, University of Michigan, 6: 1-213. Floridobia is known from peninsular Florida north along the Atlantic seaboard to Maine. 56).
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