Madagasikara

Madagasikara
	Madagasikara spinosa Lamarck , 1822
Systematics
Class :	Snails (gastropoda)
Superordinate :	Caenogastropoda
Order :	Sorbeoconcha
Superfamily :	Cerithioidea
Family :	Pachychilidae
Genre :	Madagasikara
Scientific name
	Madagasikara
	Köhler & Glaubrecht, 2010

Madagasikara is a genus of tropical freshwater snails fromthe Pachychilidae family .

features

Madagasikara species usually have relatively large and towering bowls and often have a very pronounced sculpture made up of either spiral or axial elements. The presence of a breathing channel on the lower inside of the shell opening is particularly characteristic. Like all representatives of the Pachychilidae , the species of the genus have an oval, multispiral and almost concentric operculum . Most species are oviparous , but at least one species, M. vivipara , is ovoviviparous . Females of this species hold eggs and developing juveniles in the mantle cavity.

Taxonomy

The name of the genus is derived from the Malagasy word for Madagascar . In earlier works, species of this group were assigned to other genera, such as Melania , Pirena or, in particular, Melanatria . However, for taxonomic reasons , these names are not available for these Malagasy snails .

distribution

Madagasikara is endemic to Madagascar and occurs on the entire island, except in the extreme, rather dry south, in predominantly fast-flowing, oxygen-rich rivers.

species

Madagasikara madagascariensis

Six types are currently described:

Madagasikara johnsoni (EA Smith, 1882)
Madagasikara madagascariensis (Grateloup, 1840)
Madagasikara spinosa (Lamarck, 1822) - type species, synonym : Melanatria fluminea
Madagasikara vazimba Koehler & Glaubrecht, 2010
Madagasikara vivipara Koehler & Glaubrecht, 2010
Madagasikara zazavavindrano Koehler & Glaubrecht, 2010

literature

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k 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 : pp. 867-894. DOI: 10.1111 / j.1095-8312.2009.01390.x
↑ Brown, DS (1994): Freshwater snails of Africa and their medical importance. London, Taylor and Francis.
^ Brown DS (1996). Melanatria madagascarensis . 2006 IUCN Red List of Threatened Species. Downloaded on August 7, 2007.
^ Brown DS (1996). Melanatria fluminea . 2006 IUCN Red List of Threatened Species. Downloaded on August 7, 2007.

[Köhler_2010-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k 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 : pp. 867-894. DOI: 10.1111 / j.1095-8312.2009.01390.x

[Brown_1994-2] Brown, DS (1994): Freshwater snails of Africa and their medical importance. London, Taylor and Francis.

[3] Brown DS (1996). Melanatria madagascarensis . 2006 IUCN Red List of Threatened Species. Downloaded on August 7, 2007.

[4] Brown DS (1996). Melanatria fluminea . 2006 IUCN Red List of Threatened Species. Downloaded on August 7, 2007.