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Microcornus eximius
Taxonomy
Microcornus eximius was named by Duan (1984) [DISTRIBUTION: Cambrian; China. COMMENTS: Duan in Xing et al. 1984]. Its type specimen is SH 1001, a shell, and it is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Microcornus eximius Duan p. 153 figs. pl. 1, fig. 5 |
| 1984 | Microcornus eximius Xing et al. p. 153 figs. pl. 1: 5 |
| 2001 | Microcornus eximius Gravestock et al. p. 100 figs. Pl. X, fig. 12a, b |
| 2004 | Microcornus eximius Malinky and Skovsted p. 556 figs. 3A-B |
| 2006 | Microcornus eximius Wotte p. 154 |
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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.
†Microcornus eximius Duan 1984
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. M. Malinky and C.B. Skovsted 2004 | Conch orthoconic although with slight apical curvature toward right when viewed from dorsum; apical angle large such that conch has wide appearance; venter slightly inflated, grading into rounded lateral edges which in turn pass into nearly flat, only slightly inflated dorsal flanks; flanks meet in high, almost keel−like median ridge. Cross−section has rounded triangular shape. Aperture appears orthogonal with long ligula having steeply dipping sides toward aperture; anterior edge of ligula rounded; lateral sinuses well−developed, as is sinus in centre of dorsal apertural rim. Surface of shell covered with fine, equally spaced growth lines that are most prominent next to aperture but become fainter in direction of apex. Distinct bulbous protoconch separated from remainder of conch by shallow constriction. |