| Margarya | |
|---|---|
 | |
| Shell of Margarya melanioides, the type species of Margarya | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Architaenioglossa |
| Family: | Viviparidae |
| Subfamily: | Bellamyinae |
| Genus: | Margarya Nevill, 1877 [1] |
| Diversity | |
| 8 species [2] | |
| Synonyms [2] | |
| |
Margarya is a genus of large operculate freshwater snails, aquatic gastropod molluscs in the family Viviparidae. [2] [3]
The genus Margarya was described by Nevill (1877) based on shells of the type species collected by A.R. Margary from Lake Erhai, the type locality of Margarya melanioides . [1] Based on shell and radular morphology, Tchang & Tsi (1949) revised this genus for the first time and recognized seven distinct species. [4] He created two subgenera of Margarya , viz Tchangmargarya and Mabillemargarya. [5] The first molecular phylogeny showed that the genus Margarya is polyphyletic and divided into three distinct clades. [6] Combining study of comparative morphology and molecular phylogeny, Zhang et al. revised the systematics of Margarya and recognized eight genuine extant species. However, only four species were found belonging to Margarya s. str., the rest species belonging to distinct genus Tchangmargarya or Anularya . [2]
This genus appear to be endemic to Dian Lake, Erhai Lake, Cibi Lake, Jianhu Lake, Xihu Lake, and Lugu Lake in Yunnan Province in the China. [2]
There are 4 extant species and 4 fossil species of Margarya s. str. [2] Margarya bicostata and Margarya mansuyi are transferred to Anularya . Margarya yangtsunghaiensis is transferred to Tchangmargarya . Species within the genus Margarya include 8 species: [2]
Species brought into synonymy: [2]
The cladogram based on sequences of mitochondrial 16S ribosomal RNA and cytochrome-c oxidase I (COI), and nuclear ITS2 genes showing the phylogenic relationships of the genus Margarya indicates that Margarya is polyphyletic. [2] [6] Margarya as traditionally delimited decayed into three distinct clades. The sister lineages of two of these clades are representatives from different viviparid genera, which are widely distributed in East and Southeast Asian rivers and lakes. These predominantly riparian viviparids also differ markedly in their shell morphology. Herein only genus-level phylogenic relationship is given, whereas relationship between lower taxonomic units deserve further study.
| Margarya and related Viviparidae | |
Viviparidae, sometimes known as the river snails or mystery snails, are a family of large aquatic gastropod mollusks, being some of the most widely distributed operculate freshwater snails.
Cipangopaludina is a genus of freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Viviparidae.
Cyclophorus is a genus of operculate land snails, terrestrial gastropod mollusks in the family Cyclophoridae.
Plectopylidae is a taxonomic family of large air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Plectopyloidea.
Margarya monodi is a species of large operculate freshwater snail, an aquatic gastropod mollusc in the family Viviparidae, the river snails.
Semisulcospira is a genus of freshwater snails with an operculum, an aquatic gastropod molluscs in the family Semisulcospiridae.
Margarya mansuyi is a species of large operculate freshwater snail, an aquatic gastropod mollusk in the family Viviparidae, the river snails.
Tchangmargarya yangtsunghaiensis is a species of large operculate freshwater snail, an aquatic gastropod mollusc in the family Viviparidae, the river snails.
Margarya melanioides is a species of large operculate freshwater snail, an aquatic gastropod mollusc in the family Viviparidae, the river snails.
Tchangmargarya is a genus of large operculate freshwater snails, aquatic gastropod molluscs in the family Viviparidae.
Anularya is a genus of large operculate freshwater snails, aquatic gastropod molluscs in the family Viviparidae.
Tchangmargarya multilabiata is a species of large operculate freshwater snail, an aquatic gastropod mollusc in the family Viviparidae, the river snails.
Margarya francheti is a species of large operculate freshwater snail, an aquatic gastropod mollusc in the family Viviparidae, the river snails.
Margarya oxytropoides is a species of large operculate freshwater snail, an aquatic gastropod mollusc in the family Viviparidae, the river snails.
Sinotaia is a genus of large operculate freshwater snails, aquatic gastropod molluscs in the family Viviparidae.
Camaena is a genus of air-breathing, Asian land snails in the family Camaenidae.
Ganesella is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Camaeninae of the family Camaenidae.
Metalycaeus is a genus of tropical land snails with an operculum, terrestrial gastropod mollusks in the family Alycaeidae.
Trichochloritis is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Camaeninae of the family Camaenidae.
