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Costiconus
Taxonomy
Costiconus was named by Rasmussen (2001). Its type is Panderodus ethingtoni.
It was assigned to Conodonta by Rasmussen (2001).
It was assigned to Conodonta by Rasmussen (2001).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2001 | Costiconus Rasmussen pp. 59 - 60 |
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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. †Costiconus Rasmussen 2001
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†Costiconus costatus Dzik 1976
†Costiconus ethingtoni Fåhræus 1966
†Costiconus iniquus Viira 1974
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Rasmussen 2001 | The apparatus is basically trimembrate, comprising drepanodontiform, oistodontiform and costate elements. The drepanodontiform and oistodontiform elements are asymmetrical, adenticulate and acostate. The drepanodontiform elements are planoconvex and nongeniculate, while the oistodontiform elements are inwardly bowed, planoconvex or gently biconvex, and geniculate or nongeniculate . The costate elements make a symmetry-transition series of costate, adenticulate, nongeniculate coniform elements making at least 1 9 different variations based on the location and num ber of costae on the lateral surfaces. Costiean us n. gen. is characterised by a basal cavity which extends about 30 - 50 % of the total length of element. |