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Baculites kirki
Taxonomy
Baculites kirki was named by Matsumoto (1959). Its type specimen is UCMP 35693 and is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Baculites kirki Matsumoto p. 143 figs. Pl.43, figs. 1a-c, 2a-c, 3a-c; Text-figs. 53a, b, 54-57, 58a, b |
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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.
†Baculites kirki Matsumoto 1959
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. Matsumoto 1959 |
The shell is small, showing slow tapering. The section is higher than broad. Asmall, rounded keel is developed on the siphonal line of the shell. It is less distinct on the internal mould, sometimes resulting in fastigate venter. The main part of the且ank is only slightly inHated on the body chamber, but somewhat inflated on the septate part. The dorsal part is roullded, but on the body whorl there are sul)angular shoulders between the dorsal part and the 且attened flanks. Thus the adult section looks like an outline of a small boat in plane View. The surface of the shell is nearly smooth, but with very weak riblet8 and indistinct striae, which show a sinus on the dorsolateral part, a broad convex curve on the dorsal part, and a prominellt projection on the ventral part, forming chevrons on the mid-venter. The suture has minute incisions of le8s acuteness, 1eaving roundish terminal to the subdivisions. The saddles and lobes are subrectangular in general outline. The former is relatively broad on the young shel1, but becomes high on the adult whor1. The antisiphonal lobe (I) is extremely small. Thus the suture is as simple as in many lower Senonian Baculites. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Age range: base of the Santonian to the top of the Early/Lower Campanian or 85.70000 to 72.20000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Santonian | USA (California) | Baculites kirki (215315) | |
| Santonian | Antarctica | Baculites kirki (83371 83372 83373 83374) | |
| Santonian | Argentina | Baculites kirki (66644) | |
| Early/Lower Campanian | Antarctica | Baculites kirki (83375) |