Fejervarya

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Fejervarya
Fejer cancri 050422 011 tdp.jpg
Crab-eating Frog (Fejervarya cancrivora), one of the "true" Fejervarya
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Dicroglossidae
Subfamily: Dicroglossinae
Genus: Fejervarya
Bolkay, 1915
Type species
Rana limnocharis
Gravenhorst, 1829
Diversity
Some 40–45 species, but see text
Synonyms

Minervarya Dubois, Ohler & Biju, 2001

Fejervarya is one of the Asian genera of frogs in the Dicroglossidae family. First proposed in 1915 by István József Bolkay, a Jugoslavian (at that time Austrian-Hungarian) naturalist of Hungarian descent also known as Stephan Bolkay, the genus did not see widespread adoption at first. As late as the 1990s it was generally included in Rana, but more recent studies have confirmed its distinctness.

These frogs are remarkable for being extremely euryhaline by amphibian standards. Species such as the Crab-eating Frog (F. cancrivora) and F. raja can thrive in brackish water, and the tadpoles of the latter can even survive in pure seawater.[1]

Systematics and taxonomy[edit]

This specimen from the Javadi Hills of Tamil Nadu (India) resembles the Cricket Frog (F. limnocharis) of Indonesia, but its origin suggests that it does not belong to that species, and perhaps not even in Fejervarya sensu stricto.

As delimited here, the genus is suspected to be paraphyletic. Any or all of Euphlyctis, Hoplobatrachus, Nannophrys and Sphaerotheca are closer relatives of some species included in Feyervarya sensu lato than the latter are to their supposed congeners. Hence, it seems necessary to split up this genus, but too few species have been studied in sufficient detail to reliably draw a boundary at present. As it seems however, the dividing line runs essentially between South Asian and Southeast Asian species, but there are some exceptions, speciation by hybridization – widespread among frogs – is liable to make molecular phylogenetic studies less reliable than elsewhere, and a few populations – e.g. F. nicobariensis and an undescribed but highly distinct lineage from Vietnam – do not easily fit into this scheme.[2][3]

Provisionally, the two suspected lineages are referred to as "F. limnocharis group" or Fejervarya sensu stricto – as F. limnocharis is the type species of Fejervarya – and "F. syhadrensis group". The widespread Cricket Frog (F. limnocharis) and some others have also been suspected to be cryptic species complexes since at least the 1970s, and indeed a few populations have been identified that almost certainly constitute undescribed species.[2][3]

Species[edit]

Fejerverya sensu lato contains almost 40 described species, as well as some putative but undescribed species:[2][3][4]

Fejervarya keralensis is of unclear relationships, but its distribution suggests it belongs to the F. syhadrensis group

F. limnocharis group (mainly Southeast Asia)

F. syhadrensis group (mainly South Asia)

Incertae sedis

References[edit]

  1. ^ Malcolm S. Gordon, Knut Schmidt-Nielsen & Hamilton M. Kelly (1961). "Osmotic regulation in the crab-eating frog (Rana cancrivora)" (PDF). Journal of Experimental Biology 38 (3): 659–678. 
  2. ^ a b c d e f Mohammed Mafizul Islam, Naoko Kurose, MdMukhlesur Rahman Khan, Toshitaka Nishizawa, Mitsuru Kuramoto, Mohammad Shafiqul Alam, Mahmudul Hasan, Nia Kurniawan, Midori Nishioka & Masayuki Sumida (2008). "Genetic divergence and reproductive isolation in the genus Fejervarya (Amphibia: Anura) from Bangladesh inferred from morphological observations, crossing experiments, and molecular analyses". Zoological Science 25 (11): 1084–1105. doi:10.2108/zsj.25.1084. PMID 19267620. 
  3. ^ a b c d e f Manabu Kotaki, Atsushi Kurabayashi, Masafumi Matsui, Wichase Khonsue, Tjong Hon Djong,, Manuj Tandon & Masayuki Sumida (2008). "Genetic divergences and phylogenetic relationships among the Fejervarya limnocharis complex in Thailand and neighboring countries revealed by mitochondrial and nuclear genes" (PDF). Zoological Science 25 (4): 381–390. doi:10.2108/zsj.25.381. PMID 18459820. 
  4. ^ Version 5.3. "Fejervarya". Amphibian Species of the World. February 12, 2009. Retrieved March 21, 2009. 

External links[edit]

  • Media related to Fejervarya at Wikimedia Commons