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Canutus nitidus
Original description: Test spindle-shaped, large, very inflated, usually with five or six post-abdominal chambers. Cephalis small, hemispherical, usually without rudimentary spine. Abdomen, thorax to second post abdominal chamber rapidly increasing in width, remaining post-abdominal chambers rapidly decreasing in width. Cephalis covered with layer of microgranular silica, remaining chambers comprised of two inner layers of variable size of irregular polygonal pore frames (pl .19, fig.6), outer most layer of triangular pore frames. Pore frames thin in rims and thick in sides, with largest pores at middle portion of test, decreasing in size apically and distally. Final post-abdominal chamber terminating in narrow tubular extension.
Original remarks:Remarks: Canutus nitidus n. sp. differs
from C. baumgartneri n. sp., by possessing a very inflated test with extremely small cephalis, and by having a test with two inner layers of variable sized irregular pore frames.
Etymology: Nitidus-a-um (Latin, adj.) sleek, glittering.
| Year | Name and author |
|---|---|
| 1987 | Canutus nitidus Yeh p. 59 figs. Pl. 6, figs. 1, 17; Pl. 19, figs. 1-2, 6, 11, 18-19 |
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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.