Scissurella costata

Scissurella costata is a species of minute sea snail, a marine gastropod mollusk in the family Scissurellidae.[2]

Scissurella costata
Drawing with an apertural view of the shell of Scissurella costata
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Vetigastropoda
Superfamily:
Scissurelloidea
Family:
Scissurellidae
Genus:
Scissurella
Species:
S. costata
Binomial name
Scissurella costata
Synonyms
  • Argonanta uniumbilicatus O. G. Costa, 1828
  • Delphinula calcaroides Cantraine, 1842
  • Padollus orbignyi O. G. Costa, 1839
  • Scissurella cancellata Jeffreys, 1856
  • Scissurella decipiens O.G. Costa, 1861
  • † Scissurella decussata d'Orbigny, 1824
  • Scissurella dorbignyi Scacchi, 1836
  • † Scissurella elegans d'Orbigny, 1824
  • Scissurella laevigata d'Orbigny, 1824
  • Scissurella plicata Philippi, 1836
  • Scissurella striatula Philippi, 1844

Description

The size of the shell varies between 1 mm and 2.5 mm. The thin, white shell is transparent. The spire is depressed, and composed of 4 whorls that are plane on their upper surfaces, strongly carinated at the periphery, and convex below the carina. The body whorl is very large, and widely umbilicated. The oblique aperture is subquadrangular. The simple columella is arcuate. The simple lip is sinuous, with a narrow profound fissure. The slit fasciole forms the carina of the whorls, with elevated, lamellar edges, and arcuate growth lamellae. The umbilicus is broad and deep. It is carinated at the border. The surface is sculptured with arcuate longitudinal riblets, widely spaced and a little undulating, and fine spiral striae.[3]

Distribution

This marine species occurs off Spain (Tenerife), Canary Islands), Portugal (Madeira)and in the Mediterranean Sea and the Adriatic Sea.

gollark: There's a 28-day-ish day/night cycle.
gollark: No, you just have... longer hours?
gollark: Actually, come to think of it, you would probably need a pretty powerful microcontroller to hold and handle the whole database of time zone insanity.
gollark: An RTG might be better for the whole "overengineering" thing than solar power, but they're pretty hard to get hold of, and it might be a bit heavy.
gollark: Just stick in a GPS receiver - that provides you with both location, obviously, and the super-accurate timing data GPS provides - probably some sort of microcontroller, whatever display you want, rather a lot of battery, and probably a solar panel or something.

References
  1. d'Orbigny, Mem. Soc. Hist. Nat. Paris I, p. 340, t. 23, f. 2, 1823.
  2. Scissurella costata d'Orbigny, 1824. Retrieved through: World Register of Marine Species on 11 April 2010.
  3. G.W. Tryon (1890), Manual of Conchology vol. XII
  • "Scissurella (Scissurella) costata". Gastropods.com. Retrieved 16 January 2019.
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