Tubbreva
Genus of gastropods
From Wikipedia, the free encyclopedia
Tubbreva is a genus of taxonomic family of minute sea snails, marine gastropod molluscs belonging to the family Cingulopsidae.[1] First described by Winston Ponder in 1965, the genus is known to occur in the Pacific Ocean and the Mediterranean Sea.
| Tubbreva | |
|---|---|
| |
| Holotype of Tubbreva exigua | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Cingulopsidae |
| Genus: | Tubbreva Ponder, 1965 |
| Type species | |
| Rufodardanula (Tubbreva) exigua (Ponder, 1965) | |
| Synonyms[1] | |
| |
Description
In the original description, Ponder described the genus as below:
Shell very similar to Rufodardanula, though often more elongate and imperforate.
Operculum: Similar to that of R. (R.) spadix, but has a very short, almost rudimentary peg, which is only slightly thickened, and has a more expanded columella edge.
Radula: Very minute or absent as it has defied ail attempts at mounting. Until anatomical and radula characters are known, Tubbreva is considered to be subgeneric to Rufodardanula.[2]
Members of the genus have minute shells, are elongately conical, thin and smooth. Tubbreva has almost straight non-umbilicate columella with a weak bulge, and a thin, oval operculum that lacks an internal ridge. Additionally, the operculum has a very short peg that does not project beyond the margin and no radula.[3][4]
Taxonomy
Tubbreva was first described by Winston Ponder in 1965 as a subgenus of Rufodardanula. Ponder named Tubbreva exigua as the type species.[2] In 1980, the taxon was raised to genus level by Ponder and E. K. Yoo.[3] Due to the genus' distribution in the Mediterranean and the Pacific, Ponder suggested that the genus was found in the prehistoric Tethys Ocean, before the ocean was spit apart.[5]
Phylogenetic analysis places Tubbreva within the Cingulopsoidea superfamily, being more closely related to Eatonina than genera such as Skenella, Eatoniella or Crassitoniella.[6]
Distribution
Species
Species within the genus Tubbreva include:[1]
- † Tubbreva chattica Lozouet, 1998
- Tubbreva exaltata (Powell, 1933)
- Tubbreva exigua (Ponder, 1965)
- Tubbreva insignificans (Ponder & Yoo, 1981)
- Tubbreva micrometrica (Aradas & Benoit, 1876)
- Tubbreva minutula (Powell, 1937)
- Tubbreva parva (Ponder & Yoo, 1981)
- Tubbreva sorenseni (A. W. B. Powell, 1955)
Gallery
Tubbreva insignificans
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