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Boucotspira antelopensis
Taxonomy
Trochonemella antelopensis was named by Rohr (1996). Its type specimen is USNM 485279, a shell, and it is a 3D body fossil.
It was recombined as Boucotspira antelopensis by Wagner (1999).
It was recombined as Boucotspira antelopensis by Wagner (1999).
Synonymy list
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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.
†Boucotspira antelopensis Rohr 1996
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. M. Rohr 1996 | Low-spired (115˚), gradate, narrowly phaneromphalous with carina at whorl shoulder; raised selenizone above midwhorl, lower-outer angulation with short frill; circumumbilical cord.
Apical angle about 115˚, narrowly phaneromphalous, gradate shell with maximum diameter of about 3 cm; short frill at lower-outer edge of early whorls which becomes smaller in later growth stages; whorl embraces previous whorl just below frill forming either a shallow canal or narrow ramp which is bordered by carina; below carina, shell surface is flat and dips about 40 degrees to flat, raised selenizone located above midwhorl; below selenizone, slightly concave whorl surface dips to frill at lower-outer edge; spiral cord on convex base of whorl; labral edge strongly prosocline and opisthocyrt from base of whorl to frill, then curving convexly back to selenizone to form wide notch; depth of slit unknown; columellar lip and outer lip thickened. |