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Corynexochus
Taxonomy
Corynexochus was named by Angelin (1854) [Sepkoski's age data: Cm mMid Cm Dres-u Sepkoski's reference number: 16]. It is not extant. Its type is Corynexochus spinulosus.
It was assigned to Corynexochidae by Walcott (1916), Resser (1936) and Jell and Adrain (2002); and to Corynexochida by Sepkoski (2002).
It was assigned to Corynexochidae by Walcott (1916), Resser (1936) and Jell and Adrain (2002); and to Corynexochida by Sepkoski (2002).
Species
C. (Bonnia), C. bornholmiensis, C. chinensis, C. delagei, C. donggouensis, C. elongatus, C. eosimplex, C. hunanensis, C. minor, C. plumula, C. spinulosus (type species), C. xiangxiensis
Synonymy list
| Year | Name and author |
|---|---|
| 1854 | Corynexochus Angelin |
| 1916 | Corynexochus Walcott p. 309 |
| 1936 | Corynexochus Resser pp. 22 - 23 |
| 2002 | Corynexochus Jell and Adrain p. 361 |
| 2002 | Corynexochus Sepkoski |
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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.
G. †Corynexochus Angelin 1854
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Subg. †Corynexochus (Bonnia) Walcott 1916
†Corynexochus bornholmiensis Grönwall 1902
†Corynexochus chinensis Lin and Zhang 1979
†Corynexochus delagei Miquel 1905
†Corynexochus donggouensis Lin and Zhang 1979
†Corynexochus elongatus Yang et al. 1993
†Corynexochus eosimplex Yang et al. 1993
†Corynexochus hunanensis Duan et al. 1999
†Corynexochus minor Walcott 1889
†Corynexochus plumula Whitehouse 1939
†Corynexochus spinulosus Angelin 1878
†Corynexochus xiangxiensis Peng et al. 2004
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. E. Resser 1936 | Small trilobites with large glabella extending to the anterior edge. Glabella expanded forward so that its width at the front end is about twice that dimension at the neck ring; short, faint gla- bellar furrows present. Eyes small, situated forward of the midpoint. Fixed cheeks wide in rear, tapering rapidly to extinction at the an- terior end of the eyes, except for tiny anterior lobes.
Thorax in C. minor has seven segments. Pygidium small, flat, with segments fused. Axial and pleural fur- rows present. |