Pseudodaphnella alternans
Pseudodaphnella alternans is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.[1]
| Pseudodaphnella alternans | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Superfamily: | Conoidea |
| Family: | Raphitomidae |
| Genus: | Pseudodaphnella |
| Species: | P. alternans |
| Binomial name | |
| Pseudodaphnella alternans (E. A. Smith, 1882) | |
| Synonyms[1] | |
|
Pleurotoma (Defrancia ?) alternans E. A. Smith, 1882 (original combination) | |
Description
The length of the shell attains 6 mm, its diameter 2.5 mm.
The ovate shell contains probably 7 whorls (the apex is missing). The 5 remaining whorls are slightly convex and contain 12 longitudinal ribs (continuing to the base of the body whorl). The spiral lirae form small nodules when crossing the ribs (4 in the penultimate whorl, 10 in the body whorl) and are very cancellate. The aperture is very narrow and measures about 3/7 of the total length. The outer lip is incrassate with about 6 denticules within and is somewhat sinuate at the top. The siphonal canal is narrow, short and truncate.
The colouring of this species is very remarkable. In the upper whorls the ribs are alternately brown and white, and the lowest liration, which is in conjunction with the suture and encircles the middle of the body whorl, is wholly white. The fifth and sixth lirations on the last, reckoning from the suture, are rather far apart, and the longitudinal ribs between them are uniformly brown. [2]
References
- MolluscaBase (2019). MolluscaBase. Pseudodaphnella alternans (E. A. Smith, 1882). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=596309 on 2019-11-11
- Smith E.A. (1882). Diagnoses of new species of Pleurotomidae in the British Museum. Annals and Magazine of Natural History. ser. 5, 10: 296-306
External links
- Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
- Kilburn, R. N. (2009). Genus Kermia (Mollusca: Gastropoda: Conoidea: Conidae: Raphitominae) in South African Waters, with Observations on the Identities of Related Extralimital Species. African Invertebrates. 50(2): 217-236
- Li B.-Q. [Baoquan & Li X.-Z. [Xinzheng] (2014) Report on the Raphitomidae Bellardi, 1875 (Mollusca: Gastropoda: Conoidea) from the China Seas. Journal of Natural History 48(17-18): 999-1025]