- Madagasikara spinosa
-
Madagasikara spinosa 
drawing of apertural view of Madagasikara spinosa Conservation status Scientific classification Kingdom: Animalia Phylum: Mollusca Class: Gastropoda (unranked): clade Caenogastropoda
clade Sorbeoconcha
Superfamily: Cerithioidea Family: Pachychilidae Genus: Madagasikara Species: M. spinosa Binomial name Madagasikara spinosa
(Lamarck, 1822)[2]Synonyms[4] - Pirena spinosa Lamarck, 1822
- Melanopsis spinosa
- Pirena (Melanatria) spinosa
- Melanatria spinosa
- Melanopsis lamarckii Potiez & Michaud, 1838
- Pirena lamarckii
- Pirena fluminea Reeve, 1859[3]
- Melanatria fluminea
- Pirena maura Reeve, 1859
- Pirena lingulata Reeve, 1859
- Pirena aspera Brot, 1862
- Melanatria goudotiana Brot, 1879 in Brot, 1874-79
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]
Contents
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
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
- ^ Brown D. S. (1996). Melanatria fluminea. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.
- ^ 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
Categories:- IUCN Red List near threatened species
- Pachychilidae
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