Microdrillia triporcata

Microdrillia triporcata
Original image of a shell of Microdrillia triporcata
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Caenogastropoda
Clade: Neogastropoda
Superfamily: Conoidea
Family: Borsoniidae
Genus: Microdrillia
Species: M. triporcata
Binomial name
Microdrillia triporcata
(E. A. Smith, 1879)
Synonyms[1]

Pleurotoma triporcata E. A. Smith, 1879 (original combination)

Microdrillia triporcata is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.[1]

Description

The length of the shell attains 14 mm; its width 4.5 mm..

(Original description) The shell has a shortly fusiform shape. Its color is a uniform pale brown or luteous tint. It contains 9 whorls, the first globular, glassy, rather large, the rest encircled with three distinct keels. The uppermost is just beneath the suture. The median one (the most prominent of all) is situated in the middle of the whorls, and the lowermost a little above the lower suture. The interstices between the carinations are finely latticed with spiral thread-like lirae and raised incremental lines. The former are about three or four in number in each of the interstitial spaces, and the latter very arcuate between the central and uppermost keel, and very oblique beneath the former. The body whorl has about twelve additional carinae or lirae, whereof the four uppermost are stouter and further apart than those beneath. The columella is a little oblique and arcuate above the middle, more sloping below. The lip is thin, very much produced in the middle, widely and deeply notched between the terminations of the uppermost and principal keels. The siphonal canal short and recurved. [2]

Distribution

This marine species occurs off Japan.

References

  1. 1 2 WoRMS (2015). Microdrillia triporcata (E. A. Smith, 1879). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=434410 on 2016-03-16
  2. ↑ Smith, Edgar A. "11. On a Collection of Mollusca from Japan." Proceedings of the Zoological Society of London. Vol. 47. No. 1. Blackwell Publishing Ltd, 1879 (described as Pleurotoma difficilis)
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