Microdrillia

Microdrillia
Drawing of a shell of Microdrillia fastosa
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Borsoniidae
Genus: Microdrillia
Casey, 1903
Type species
  • Pleurotoma albula Hutton, 1873
  • Pleurotoma meyeri Cossmann, 1906


Synonyms[1]
  • Acrobela Thiele, 1925 (Invalid: junior homonym of Acrobela Foerster, 1862 [Hymenoptera]; Acropota is a replacement name)
  • Acropota F. Nordsieck, 1977

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

Species brought into synonymy

References

  1. 1 2 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
  2. ↑ Fossilworks: Microdrillia
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