| Madagasikara spinosa | |
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| Madagasikara spinosa | |
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| Species: | M. spinosa
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| Binomial name | |
| Madagasikara spinosa | |
| Synonyms [4] | |
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Madagasikara spinosa is a species of tropical freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Pachychilidae. [4]
Madagasikara spinosa is the type species of the genus Madagasikara. [4]
Distribution
This species is endemic to Madagascar. [4] It was recorded in East Madagascar and in surrounding islands such as Île Sainte-Marie. [4]
The type locality is "Dans le rivières de l’ile de Madagascar", in rivers of Madagascar. [4]
Description
_-_Pachychilidae_-_Mollusc_shell.jpeg)
The shell is elongate and large and it has 5.0-11.0 whorls. [4] The color of the shell is from brown to black. [4] The apex is truncated. [4] There are axial ribs especially on upper whorls. [4] The aperture is widely oval with palatal and basal sinus. [4]
The width of the shell is 9.9-28.3 mm. [4] The height of the shell is 25.2-69.5 mm. [4] The width of the aperture is 5.0-18.4 mm. [4] The height of the aperture is 8.0-23.1 mm. [4]
The operculum is oval and black. [4]
The color of the animal is dark grey to black with yellowish dots. [4] Tentacles are quite long. [4] Radula is taeniglossate. [4] Radula is about 16 mm long with about 127 rows of teeth. [4]
Ecology
It lives in fast running streams. [4]
Sexes are separate ( gonochorism). [4] Females lays eggs ( oviparous). [4]
References
- ^ Van Damme, D. (2016). "Madagasikara spinosa". IUCN Red List of Threatened Species. 2016: e.T91353068A91353128. doi: 10.2305/IUCN.UK.2016-3.RLTS.T91353068A91353128.en. Retrieved 14 November 2021.
- ^ Lamarck J. B. (1822). Histoire naturelle des animaux sans vertèbres. Paris, J. B. Baillière. page 172.
- ^ Reeve L. A. (1859). Pirena. In: Reeve L. A. (ed.) Conchologia iconica. London, Reeve. 12: plate 2, figure 6-7, figure 9-10.
- ^ a b c d e f g h i j k l m n o p q r s t u v w Köhler, F. & Glaubrecht, M. (2010). "Uncovering an overlooked radiation: molecular phylogeny and biogeography of Madagascar’s endemic river snails (Caenogastropoda: Pachychilidae: Madagasikara gen. nov.). Biological Journal of the Linnean Society 99: 867-894. doi: 10.1111/j.1095-8312.2009.01390.x