Trochonema umbilicata Hall 1847 (snail)

Gastropoda - Trochonematoidea - Trochonematidae

Alternative combinations: Pleurotomaria umbilicata, Trochonema umbilicatum, Trochonema unbilicatum

Full reference: J. Hall. 1847. Containing descriptions of the organic remains of the lower division of the New York system (equivalent of the Lower Silurian rocks of Europe). Paleontology of New York 1:1-338

Belongs to Trochonema according to P. J. Wagner 2017

See also Hall 1847, Liberty 1969, Nelson 1963, Pitcher 1939, Salter 1859, Sloan and Webers 1987, Twenhofel 1928, Ulrich and Scofield 1897, Wagner 1995, Wagner 1999 and Wilson 1951

Sister taxa: Trochonema altum, Trochonema attavum, Trochonema beachi, Trochonema bellulum, Trochonema beloitense, Trochonema biangulata, Trochonema cambodgensis, Trochonema canadensis, Trochonema coxi, Trochonema dispar, Trochonema eccentricum, Trochonema exile, Trochonema fragile, Trochonema galtensis, Trochonema liljevalli, Trochonema madisonense, Trochonema minnesotensis, Trochonema minus, Trochonema panderi, Trochonema peraltum, Trochonema puchangshaensis, Trochonema puchangshanensis, Trochonema retrorsum, Trochonema rugosa, Trochonema schmidti, Trochonema shallochense, Trochonema subcrassum, Trochonema tricinctum, Trochonema trochonemoides, Trochonema vagrans, Trochonema valenticum, Trochonema vittatum, Trochonema wartheni, Trochonema wilsonae

Ecology: epifaunal

Distribution:

• Ordovician of Canada (22: Manitoba, Northwest Territories, Ontario, Quebec collections), Greenland (1), United States (36: Colorado, Illinois, Illinois, Iowa, Indiana, Minnesota, Tennessee, Virginia)

• Chazy of Canada (2: Ontario, Quebec)

Total: 61 collections each including a single occurrence

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