(Pilsbry, 1889). This is particularly so in the Pulmonata. 33); males without copulatory structures. Photograph by Lyle J. Buss, University of Florida. Mesa Rams-horn Shell 2.8-3.7 mm long. 204-207), often eroded in older specimens. 99). Figure 13. Gulf Coast Pebblesnail) Somatogyrus walkerianus (Aldrich, 1905). Inferior crest usually present. It, too, is edible and has been relocated to North America (California, Florida, Georgia) and South America (Argentina, Chile, Uruguay). Marsh Rams-horn It has a narrow umbilicus, which is normally half covered and sometimes difficult to detect (Pilsbry 1940). Eddy County New Mexico. Elimia athearni Length of shell 2.1-2.8 mm (Fig. Aperture usually open; occasionally with a horizontal, shelf-like septum closing posterior part (Fig. Among the most interesting of the molluscs are the snails. Adults 9-15 mm wide (Figs. Photograph by Lyle Buss, University of Florida. Shell usually with raised spiral threads around periphery, frequently the uppermost thread has conical or triangular spines (Figs. Length of shell 2.0-2.4 mm (Fig. Photograph by Lyle Buss, University of Florida. If left to their own devices, snails will munch on your plants, leave sticky trails all around your home, or overtake your fish tank. Sculpture consisting of fine incremental threads, and spiral striations that may become obsolete at maturity. Smooth-ribbed Hydrobe These snails readily feed on the leaves and flowers of many annual garden plants, particularly flowers, if they are grown in mulched planting beds. Planorbula armigera wheatleyi Clench, W.J. 3). Figure 26. Although the shell of this snail does resemble a ram's horn, the term 'ramshorn' is normally reserved for snails of a different family, Planorbidae, so use of this name is discouraged. Copper foil designed specifically for deterring mollusk movement is available commercially from garden supply centers and catalogs. Apical whorls depressed; body whorl obtusely angular above and sharply carinated around funnel-shaped umbilicus. Critical Florida references are Thompson 1968, 1969, 2000; Thompson and Hershler, 1991, and Hershler and Thompson, 1992. Snails have invaded some local areas throughout northern Santa Rosa and Escambia Counties this summer. Photograph by Lyle Buss, University of Florida. Sculpture consisting of distinct spiral striations and threads superimposed on growth striations (Fig. Three occur in Florida. Reduce their population by trying to manage their living conditions. Shell usually planispiral, but two species may have a flat-topped, elevated spire. Floridobia fraterna Hubricht L. 1985. Umbilicus narrow, deep (Fig. Your choice will lead you to the proper identification of your snail or the next appropriate pair of questions. Eggs absorbed moisture from the substrate and hatched in 10–14 days. Robinson DG, Fields A. One species occurs naturally in Florida, and three others have been introduced. Only Elimia is found in Florida. Figure 16. Tadpole Physa 1969. shell with 3.9-4.2 whorls (Fig. In some snails there is only a single act of copulation, whereas in others, mating can occur repeatedly. University of Florida Outer lip of aperture strongly sinuous in lateral profile (Fig. Other bait formulations contain boric acid as a toxicant; while also safer than metaldehyde, boric acid seems to be much less effective than iron phosphate (Capinera, unpublished). Among the more unusual features of snail biology is the mode of reproduction. They eat grass, roots of plants and trees, etc. Two occur in Florida. Shell sculptured with vertical, weakly curved ribs and much finer spiral striations. Plane of aperture nearly vertical when viewed from the side. 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. 153). Cultural control. 170). Elimia dickinsoni Last whorl distinctly shouldered. 16, 25, 28). (Vail, 1979). Speiser B, Kistler C. 2002. Approximately 35 species have been described. Spurwinkia: Morphology, systematics, and ecology of’ a new genus of North American marshland Hydrobiidae (Mollusca: Gastropoda). 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. Adult shells about 40 – 70 mm high (Fig. Spiral sculpture faint or absent (Figs. In both species, the ridge may be dark brown to almost black. Physella gyrina aurea Adults about 2-3 mm long (Figs. Elimia clenchi 91). The bodies of large snails, such as viviparids and pilids, should be pulled from the shell. Egg (right) and newly hatched snail (left) of the giant African land snail, Achatina (Lissachatina) fulica Férussac, 1821). (Lamark, 1822). (Thompson, 2000). Suture relatively shallow. It attacks tropical fruit and citrus, most ornamental plants, and vegetable plants. Shell with 3-4 whorls. Snails and slugs are favored by high humidity. Penis as illustrated (Fig. Fossaria cubensis Since then a great amount of fieldwork has taken place throughout Florida, and many additions to the fauna have come to light. Studies on West Indian mollusks: the genus. 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. Most inhabit fresh water, but some also occur in brackish water. Penis filament white. Hydrobiids are small- to medium-sized operculate snails that live primarily in brackish and fresh water. Radke MG, Ritchie LS, Ferguson FF. Unlike most animals, it is not obvious that snails display bilateral symmetry (the left and right halves of the animal are mirror images). 129). Choctawhatchee Pebblesnail) Somatogyrus sp. It lacks an umbilicus (cone-shaped depression at center of the whorls when viewed from below). 2004. Anyone have any suggestions where they have come from and how I get rid of them?!?! 61). 107, 108). However, a recent molecular study (Rawlings et al. 82). The shell has 5–5.5 whorls. The systematic relationships of the hydrobiid snail genus Nymphophilus Taylor, 1966 and the status of the Subfamily Nymphophilinae. Fenney Spring Hydrobe Be careful with keeping small fish with the Dwarf Crayfish, especially the ones that rest on the bottom. Fred G. Thompson (1934-2016) The only snail among the Pomacea applesnails in Florida that feeds on higher plants is Pomacea maculata. It became increasingly important to provide an identification manual of the freshwater snails of Florida for many reasons. This snail has proved to be quite voracious, capable of consuming most plants it encounters. Newborn shells white. 23, 26). Never preserve shell specimens in formalin. Copper foil and screening is believed to react with mollusc slime to create an electrical current that deters them from crossing the barrier. Shell sculpture with incremental striations only. Whorls flat-sided with suture weakly impressed. The following key is modified from Basch (1963). 1964. One species, Spilochlamys turgida (Thompson, 1969), the Pumpkin Siltsnail (Fig. It is troublesome mostly in southern Florida as far north as Tampa, but because potted plants are regularly moved northward it can appear almost anywhere. Adult shells about 40-60 mm high (Fig. More data based on many population samples from throughout this range will be necessary before the validity of the three forms can be determined. Nuclear whorl 0.41 mm in diameter transverse to initial suture. Ph.D. thesis, University of Michigan, i-xii, 1-324. Spire usually about equal to or greater than height of aperture (Figs. 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. Channeled Applesnail Thick-shelled Hydrobe Its potential to cause damage is unknown. Whorls of spire less rounded. It secretes an epiphragm during such periods. Shell elongate. 131). In 1976 in the St. Johns River 1 found Melanoides tuberculatus with population densities of 10,000/m2. Whorls 3.0-4.0. Whorls shouldered above near suture (Fig. It feeds on some ornamental plants at this location, but is not a serious problem. Apex less than 0.4 times length of shell. Interior of aperture livid white. Snails secrete an acidic material from the sole of their foot that dissolves calcium in the soil and allows uptake so the shell can be secreted. Apex nearly straight-sided or concave in outline. Giant African land snail also has the potential to transmit disease-causing organisms to plants and animals, including humans. (Pfeiffer, 1839). Shell with prominent ribs and spiral chords on all whorls. Penis with invaginated cave-like pit within U-shaped superior tubercles. Height of shell about 23-26 mm (Figs. (C.B. The distributions of the native land mollusks of the eastern United States. Te, G.A. Olive NeriteNeritina usnea(RÃ¶eding, 1798). University of Illinois Press, Urbana. A review of the recent freshwater limpet snails of North America. It is presented in the form of key supplements with illustrations and habitat information to facilitate identifications. Green Cove Springsnail 2004. Alien non-marine snails and slugs of priority quarantine importance in the United States: a preliminary risk assessment. Rather stocky, adult about 15-20 mm long (Fig. 111). (March 2006). Spire short and compact, about 0.5-0.7 times height of aperture in mature specimens, proportionally longer in juveniles (Fig. Aphaostracon pachynotus (Thompson, 1968). Shell translucent. 86). Biochemical studies show that in Elimia shell characters are conservative indicators of genetic divergence (Mihalcik & Thompson, 2002). Shell with 5.6-6.8 whorls; about 3.2-4.5 mm long (Fig. Its color is brownish orange. Shell with or without bands; slender; Suture deeply impressed; upper whorls with a strongly carinate periphery (Fig. This genus contains three species. Frequently the shells of ampulariids and viviparids are very similar. 51, 52). Apex flat with narrow threadlike keel. 1980. The spike-topped applesnail, Pomacea diffusa Blume 1957. Accessory crest present. Gamon,ET. Medium- to large-sized tropical freshwater snails. They occur in both aquatic (marine and fresh-water) and terrestrial environments. 191 pp. Marisa similarly feeds on aquatic plants, but is quite omnivorous, and will feed on decaying vegetation and aquatic animals as well. Planorbella duryi Cockscomb Hydrobe 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. Click on the link in the row that best matches your snail. The author has attempted to simplify the key to include the minimum anatomical data needed for accurate identification. If a Dwarf Crayfish gets its tiny claws on something it will likely try to eat the victim. Penis with two or more longitudinal crests within U-shaped superior tubercle (Fig. Peristome complete around aperture. 197-209). 1, pt. 10). Body whorl compressed (Fig. Shell shaggy with numerous spiral fimbriations that are broken into synchronized tufts. Apex of shell slightly convex in outline. In the adult stage, Z. provisoria is 25–30 mm in width, about 20 mm high, and possesses 4–5 whorls. Peninsula Ancylid (Pfeiffer, 1839). The rosy wolf snail, Euglandina rosea (Férussac, 1821), lateral view. Slackwater Elimia Females with live embryos in brood pouch in mantle; males with right eye stalk modified as a penis. The latter genus includes a single species, Cincinnatia integra (Say, 1817). Shell nearly smooth, sculptured with irregular growth striations. 85). Predatory snails such as the rosy wolf snail, Euglandina rosea (Férussac, 1821) (Figs. 59). A young rosy wolf snail, Euglandina rosea (Férussac, 1821), feeding on another snail. Shell about 0.38-0.41 times as wide as high and about 20-27 mm long. Aperture enlarged (dilated). The shell color of these snails is quite variable, ranging from milky white and nearly lacking pigmentation to quite dark brown, with pronounced stripes. It is adapted to arid conditions, so it can aestivate on stones and shrubs until suitable conditions return. It is best to use a combination of control methods for your yard care. Their spire is often short and reduced, especially in comparison with other families. 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. Aperture broadly attached to preceding whorl across parietal wall. Shell subcircular, smooth, often encrusted with dark material. (Fig. The LIOPLACINAE is endemic and include Campeloma, Lioplax, and Tulotoma. As they mature, the aperture rounds out and eventually becomes more oval, with the bottom lip almost in line with the base of the shell (Fig. They are 35–50 mm in diameter. Penis with 7-50 papillae along right margin and 1-4 papillae along distal third of left margin (Figs. Among the most interesting of the molluscs are the snails. Mihalcik, E. L. & F. G. Thompson. In Florida four types of Campeloma have been recognized. Veliger, 45:269-271. Shell conical or cylindrical-conical in shape; spire elevated; body whorl not disproportionately voluminous; umbilicus closed or open. (Mihalcik & Thompson, 2002). Two, Melanoides tuberculata and Tarebia granifera, are medically important because they can serve as first intermediate host for the human lung fluke, Paragonimus westermani. Shell coiled to the right, with the aperture on the right side (Figs. Few of the North American species have been studied to the extent that their taxonomy, geographic distributions, life histories, and ecology are documented. Alexander Siltsnail The rosy wolf snail, Euglandina rosea (Férussac, 1821), fully extended. Whorls of spire strongly arched or rounded. Operculum spiral, consisting of two or more rapidly increasing whorls (Fig. Shell sculptured with fine spiral threads. 32). Rawlings TA, Hayes KA, Cowie RH, Collins TM. Apex distinctly convex in outline. Barriers are also useful for minimizing damage by snails and slugs (Hata et al. Many North American snail species were described near the turn of the century by Walker (1918). 7: 97-110. Snails are important in the conversion of plant matter (often in the form of algae, fungi, or plant detritus) into animal material. Adults about 5 mm long (Figs. Shell generally thin but strong; whorls of spire strongly convex with deep suture (Figs. Three other species occur farther north. The Florida Department of Agriculture and Consumer Services has positively identified a population of Giant African land snails (GALS) in Miami-Dade County. Laevapex is a North American genus. 127); superior tubercles on penis arranged in oblique longitudinal series. Finding snails in your garden, home, or aquarium can be frustrating. 34); penis frlattened, blade-like (Fig. The one and only Florida Tiny House Festival, November 21-22, 2020, at The Villages Polo Club in The Villages, Florida. 60). Sometimes egg color and size is used in addition to shell shape to distinguish among the Pomacea spp., but egg color can change with age, so it is not entirely reliable, either.