Biology:Speightiidae
Speightiidae is an extinct taxonomic family of fossil sea snails, marine gastropod molluscs in the order Neogastropoda, currently not assigned to a superfamily.[1]
General characteristics
Members of Speightiidae have biconic-fusiform shells, with a thickened pillar ridge. The family have a broadly and shallowly arcuate V-shaped sinus located on the shoulder slope, and a ridged and bent pillar.[2][3]
Taxonomy
The family was first described by A.W.B. Powell in 1942, after a suggestion by John Marwick that Speightia spinosa and Andicula occidentalis were representatives of an ancient lineage separate from Turridae.[2] There are currently only two accepted genera within the family, Andicula and Speightia. Both of these are monotypic, including a single species each: Andicula occidentalis (H. Woods, 1922) and Speightia spinosa (Suter, 1917).[1] The genus Clinuropsis was considered a part of the family by Powell,[3] which is currently unassigned within the superfamily Conoidea.[4]
The family was placed in Conoidea by Powell in 1996, and in 2005 Philippe Bouchet and Jean-Pierre Rocroi removed the family out of Conoidea, making it unassigned within the order Neogastropoda.[5]: 161, 254, 277 [6] It has been traditionally classified near the family Turridae. But in 1993 it was shown that many, if not all, species that were placed in this family should instead be placed in the family Fasciolariidae.[7]
Paleontology
Fossils of Speightiidae date to the Paleocene and Eocene, and have been found in Nigeria, Togo, Texas and New Zealand.[8]
Genera
Genera within the family Speightiidae include:[1]
- † Andicula (H. Woods, 1922)
- † Speightia (Suter, 1917)
References
- ↑ 1.0 1.1 1.2 "Speightiidae Powell, 1942 †". MolluscaBase. World Register of Marine Species. 2022. http://www.marinespecies.org/aphia.php?p=taxdetails&id=828345.
- ↑ 2.0 2.1 , p. 166-167, Wikidata Q115110377
- ↑ 3.0 3.1 , Wikidata Q115098397
- ↑ "Clinuropsis É. Vincent, 1913 †". WoRMS. World Register of Marine Species. http://www.marinespecies.org/aphia.php?p=taxdetails&id=432432.
- ↑ , Wikidata Q47458986
- ↑ Garvie, Christopher L. (March 2013). "The Molluscan Macrofauna of the Seguin Formation (Upper Paleocene) in Central Texas.". Bulletins of American Paleontology 384.
- ↑ Tracey, S.; J.A. Todd; D.H. Erwin (1993). Mollusca, Gastropoda - The fossil record. 2. London: Chapman & Hall. pp. 131–167.
- ↑ "Family Cochlespiridae Powell 1942 (snail)". https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=txn:121059.
Wikidata ☰ Q7575768 entry
 |  |
