Microdrillia
| Microdrillia | |
|---|---|
| |
| Shell of † Microdrillia aturensis (holotype in MNHN, Paris) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Superfamily: | Conoidea |
| Family: | Borsoniidae |
| Genus: | Microdrillia Casey, 1903 |
| Type species | |
| † Oligotoma meyeri Cossmann, 1889 | |
| Synonyms[1] | |
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Microdrillia is a genus of very small sea snails, marine gastropod mollusks in the family Borsoniidae.[1]
Description
The species in this genus are characterized by a well-developed, multispiral, closely coiled protoconch. One to three of its basal whorls are costulate. The body whorl is wholly devoid of costae but spirally carinate. The retral sinus is relatively large, circularly rounded and close to the suture. The aperture is oblique. The columella is callous, with or without plications. The siphonal canal is short or subobsolete.
The following species of this genus are also found as fossils in the age range of 48.6 Ma to 0.781 Ma: Microdrillia comatotropis, Microdrillia cossmanni, Microdrillia crispata, Microdrillia harrisi, Microdrillia ouchitae, Microdrillia propetrina, Microdrillia tersa, Microdrillia trina [2]
Distribution
This marine genus occurs in the Gulf of Oman, off South Africa and off Australia (New South Wales, Queensland).
Species
- † Microdrillia aturensis Lozouet, 2017
- Microdrillia circumvertens (Melvill & Standen, 1901)
- Microdrillia commentica (Hedley, 1915)
- † Microdrillia crispata (Cristofori & Jan, 1832)
- Microdrillia difficilis (E. A. Smith, 1879)
- Microdrillia dinos Kilburn, 1986
- Microdrillia fastosa (Hedley, 1907)
- † Microdrillia meyeri (Cossmann, 1889)
- Microdrillia niponica (E. A. Smith, 1879)
- Microdrillia optima (Thiele, 1925)
- † Microdrillia pakaurangia Powell, 1942
- Microdrillia patricia (Melvill, 1904)
- Microdrillia sagamiensis Kuroda & Oyama, 1971
- Microdrillia sansibarica (Thiele, 1925)
- Microdrillia stephensensis Laseron, 1954
- † Microdrillia teretiaeformis A.W. Janssen, 1972 [3]
- Microdrillia trina Mansfield, 1925
- Microdrillia triporcata (E. A. Smith, 1879)
- Microdrillia zeuxippe (Dall, 1919)
- Species brought into synonymy
- Microdrillia loprestiana (Calcara, 1841): synonym of Drilliola loprestiana (Calcara, 1841)
- Microdrillia pruina (Watson, 1881): synonym of Retidrillia pruina (Watson, 1881)
References
- ^ a b Bouchet, P.; Gofas, S. (2015). Microdrillia Casey, 1903. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137821 on 2016-03-14
- ^ Fossilworks: Microdrillia
- ^ Janssen, Mollusken der Twistringer Schichten, N.-Deutschland, Scripta Geol. 10 (1972)
External links
- Bouchet P., Kantor Yu.I., Sysoev A. & Puillandre N. (2011) A new operational classification of the Conoidea. Journal of Molluscan Studies 77: 273-308
- Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
- De Jong K.M. & Coomans H.E. (1988) Marine gastropods from Curaçao, Aruba and Bonaire. Leiden: E.J. Brill. 261 pp.