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Rapopsis
Taxonomy
Rapopsis was named by Saul (1988) [Sepkoski's age data: K Maes-l].
It was assigned to Tudiclidae by Saul (1988); and to Neogastropoda by Sepkoski (2002).
It was assigned to Tudiclidae by Saul (1988); and to Neogastropoda by Sepkoski (2002).
Species
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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.
Diagnosis
Reference | Diagnosis | |
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L. R. Saul 1988 | Tudiclid gastropods with low-spired, rapiform shells; whorls shouldered, peripherally expanded, strongly conĀ stricted anteriorly; siphonal neck moderately long, umbilicate, bent; columella with a single, strong fold at anterior end of aperture; aperture rounded with well-developed posterior sinus at suture producing a strong welt externally; outer lip thickened, beveled, inconspicuously dentate within; inner portion of inner lip delicately wrinkled; sculpture predominately spiral, consistĀ ing of strong, broad, carina-forming ribs overridden by finer spiral ribs and riblets; subsutural welt, carina, and stronger ribs made nodose by collabral undulations. |