Cyclonema varicosum Hall 1861 (snail)

Gastropoda - Euomphalina - Platyceratidae

Alternative combination: Cyclonema varicosa

Full reference: J. Hall. 1861. Upon some new and other species of fossils, from the rocks of the Hudson-river group of Ohio and the western states; with descriptions. Annual report of the Regents of the University of the State of New York on the State Cabinet of Natural History and the Historical and Antiquarian collection annexed thereto 14:89-109

Belongs to Cyclonema according to P. J. Wagner 2017

See also Bassler 1932, Hall 1861, Thompson 1970, Ulrich and Scofield 1897 and Wilson 1949

Sister taxa: Cyclonema (Cyclonema), Cyclonema (Dyeria), Cyclonema aiens, Cyclonema ampullosum, Cyclonema ananas, Cyclonema apicatum, Cyclonema bellulum, Cyclonema bilix, Cyclonema bitauniensis, Cyclonema boreale, Cyclonema canaliculata, Cyclonema cancellatum, Cyclonema cives, Cyclonema compar, Cyclonema composita, Cyclonema consepultum, Cyclonema convergens, Cyclonema crebristria, Cyclonema cushingi, Cyclonema daytonensis, Cyclonema decora, Cyclonema delicatula, Cyclonema derelictum, Cyclonema dowlingii, Cyclonema fasciata, Cyclonema filicinctus, Cyclonema fluctuatum, Cyclonema formosum, Cyclonema gracile, Cyclonema guilleri, Cyclonema gyronemoides, Cyclonema hageri, Cyclonema hallianum, Cyclonema humerosum, Cyclonema inaequistriatum, Cyclonema inflatum, Cyclonema infrequens, Cyclonema inopinata, Cyclonema intermedium, Cyclonema karlsteinensis, Cyclonema laudabile, Cyclonema lepidula, Cyclonema leptonotum, Cyclonema limatum, Cyclonema lineatum, Cyclonema lydiamariarum, Cyclonema margaritoides, Cyclonema marylandense, Cyclonema mediale, Cyclonema minuta, Cyclonema modestum, Cyclonema montrealense, Cyclonema niagarensis, Cyclonema nodulosum, Cyclonema obsolescens, Cyclonema parvimedium, Cyclonema percarinata, Cyclonema percingulatum, Cyclonema praecipitum, Cyclonema rupestre, Cyclonema servus, Cyclonema simulans, Cyclonema statshiunaica, Cyclonema sublaeve, Cyclonema subundata, Cyclonema sulphuriferum, Cyclonema tenuissimum, Cyclonema textilis, Cyclonema thalia, Cyclonema timida, Cyclonema timidum, Cyclonema transversum, Cyclonema trepidans, Cyclonema varians, Cyclonema varispirum, Cyclonema ventricosa

Ecology: facultatively mobile epifaunal coprophage-deposit feeder

Distribution:

• Silurian of United States (9: New York collections)

• Ordovician of United States (15: Illinois, Iowa, Minnesota, Tennessee)

Total: 24 collections each including a single occurrence

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