Chytra kirki

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Chytra kirki
Chytra kirki 01.JPG
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
clade Sorbeoconcha
Superfamily:
Cerithioidea
Family:
Paludomidae
Subfamily:
Hauttecoeuriinae
Tribe:
Tiphobiini [2]
Genus:
Chytra

Moore, 1898 [3]
Species:
C. kirki
Binomial name
Chytra kirki
(E. A. Smith, 1880) [4]
Synonyms

Limnotrochus Kirkii E. A. Smith, 1880

Chytra kirki is a species of tropical freshwater snail with an operculum, aquatic gastropod mollusk in the family Paludomidae. [1]

Contents

Chytra kirki is the only species in the genus Chytra. [5]

The specific name kirki is in honor of explorer John Kirk (1832-1922), who has donated various other specimen of snails (not this species) to the Natural History Museum. [6]

Distribution

This species is found in Burundi, the Democratic Republic of the Congo, Tanzania, and Zambia. [1] The type locality is Lake Tanganyika. [4]

Description

The shell is solid, trochiform and dirty whitish in color. [6] The spire is acutely conical. [6] The shell has 6 or 7 feebly concave whorls. [6] They are bearing arcuate and flexuous lines of growth and six or seven granulous lirae, whereof that immediately above the suture is the largest. [6] The body whorl is acutely angular at the periphery, encircled by two subequal granular ridges. [6] The base is concave near the circumference, then slightly convex, concentrically granosely ridged. [6] The ridges nearest the umbilicus are coarser than the others, and also arcuately radiately striated. [6] The shell has deep and narrow umbilicus. [6]

The aperture is irregularly subcircular and whitish. [6] The outer lip (viewed laterally) is obliquely incurved. [6] Basal and columellar margins are forming one strongly arcuate line joined above to the extremity of the labrum by a thickish callosity. [6]

The width of the shell is 19 mm. [5] The height of the shell is 15 mm. [5]

Black and white drawing of lateral view of the shell. Chytra kirki shell.png
Black and white drawing of lateral view of the shell.
Black and white drawing of umbilical view of the shell. Chytra kirki shell 2.png
Black and white drawing of umbilical view of the shell.

Ecology

Its natural habitat is freshwater lakes. [1] It is widespread [5] species in the Lake Tanganyika, but its distribution is patchy and with low numbers of snails. [1] It lives on the mud with much organic material in depths 10–20 meters. [1] [5] There is possibility that it can live in depths up to 80 m. [1] [5]

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References

This article incorporates public domain text from the reference [6]

  1. 1 2 3 4 5 6 7 Ngereza, C.; Nicayenzi, F. (2010). "Chytra kirki". IUCN Red List of Threatened Species . 2010: e.T4833A11099367. doi: 10.2305/IUCN.UK.2010-3.RLTS.T4833A11099367.en . Retrieved 16 November 2021.
  2. ↑ Strong E. E. & Glaubrecht M. (2010). "Anatomy of the Tiphobiini from Lake Tanganyika (Cerithioidea, Paludomidae)". Malacologia 52(1): 115-153. doi:10.4002/040.052.0108.
  3. ↑ Moore J. E. S. (1898). "On the Hypothesis that Lake Tanganyika represents an Old Jurassic Sea". Quarterly Journal of Microscopical Science (N.S.) 41: 303-321. 307. plate 23, figure 6.
  4. 1 2 Smith E. A. (1880). "Diagnoses of new shells from Lake Tanganyika and East Africa". Annals and Magazine of Natural History (5)6: 425-430. page 426.
  5. 1 2 3 4 5 6 Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. ISBN   0-7484-0026-5.
  6. 1 2 3 4 5 6 7 8 9 10 11 12 13 Smith E. A. (1881). "On a collection of shells from lakes Tanganyika and Nyassa and other localities in East Africa". Proceedings of the Zoological Society of London 1881: 276-300. Plate 33, figure 18-18b.
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