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Conocardium formosum
Taxonomy
Conocardium formosum was named by Hoare (2002) [= Conocardium aff. C. elongatum (Sowerby) Pojeta & Runnegar p. 70 pl. 38 f. 4-7
length x height]. Its type specimen is USNM 209298, a shell, and it is a 3D body fossil. Its type locality is Mine Dump near Dueweg, which is in a Chesterian carbonate limestone in the Carterville Formation of Missouri.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Conocardium formosum Hoare pp. 123 - 124 figs. 1.1 - 1.5 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Conocardium formosum Hoare 2002
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. D. Hoare 2002 | Narrowly elongate shell with distinct separation of body and snout; strongly developed folded winglike structure dorsally and laterally on snout.
Elongate, narrow, body distinct from snout; sides of snout subparallel; umbonal areas extend slightly above hinge line; dorsal margin slopes ventrally from beak area both posteriorly and anteriorly; ventral margin of body convex below beaks becoming straighter towards rostum and snout, curves sharply ventrally meeting snout area anteriorly; anterior gape subcircular, restricted to anterior extremity; posterior orifice lacking; rostrum suboval in cross section, length unknown; rostral face and body with 29 even-sized, rounded, closely-spaced, radial costae with narrow interspaces followed anteriorly by 10 fine more widely spaced costae; snout· ornamentation begins at beak area as a V-shaped, folded, wing-like structure expanding anteriorly on dorsal and lateral surfaces, marked ventrally by four coarse costae followed dorsally by five or more fine, widely-spaced costae; ventrally, snout ornamentation forms an inverted V-shaped margin with radial costae near anterior gape; inner shelves not visible. |