Kaloula
Kaloula is a genus of microhylid frogs found in southern and eastern Asia. They are sometimes known as the Asian narrowmouth toads.[2]
| Kaloula | |
|---|---|
 | |
| Banded bullfrog, Kaloula pulchra | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Anura |
| Family: | Microhylidae |
| Subfamily: | Microhylinae |
| Genus: | Kaloula Gray, 1831 |
| Type species | |
| Kaloula pulchra Gray, 1831 | |
| Diversity | |
| About 19 species (see text) | |
Species
The genus currently has at least 19 species.[2] Some sources also recognize Kaloula macrocephala Bourret, 1942 as a valid species,[3][4] whereas the Amphibian Species of the World treats it as a synonym of Kaloula pulchra.[2] 5 new species have been described since 2000, and there are unnamed species yet to be described.[2]
| Binomial name and author | Common name | Range |
|---|---|---|
| Kaloula assamensis Das, Sengupta, Ahmed, and Dutta, 2005 | Assam, India | |
| Kaloula aureata Nutphand, 1989 | Golden bullfrog | southern Thailand |
| Kaloula baleata (Müller in Oort & Müller, 1836) | Flower pot toad | South-eastern Asia |
| Kaloula borealis (Barbour, 1908) | North-eastern Asia | |
| Kaloula conjuncta (Peters, 1863) | Truncate-toed chorus frog | Philippines |
| Kaloula ghoshi Cherchi, 1954 | Brown bullfrog | Andaman Islands |
| Kaloula indochinensis Chan, Blackburn, Murphy, Stuart, Emmett, Ho, and Brown, 2013 | Indochina | |
| Kaloula kalingensis Taylor, 1922 | Kalinga narrowmouth toad | Philippines |
| Kaloula kokacii Ross & Gonzales, 1992 | Catanduanes narrow-mouthed frog | northern Philippines |
| Kaloula latidisca Chan, Grismer & Brown, 2014 | Wide-disked narrow-mouthed frog | Malaysia |
| Kaloula mediolineata Smith, 1917 | Indochina | |
| Kaloula meridionalis Inger, 1954 | Philippines | |
| Kaloula nonggangensis Mo, Zhang, Zhou, Chen, Tang, Meng, and Chen, 2013 | Guangxi, south-western China | |
| Kaloula picta (Duméril & Bibron, 1841) | Slender-digit chorus frog | Philippines |
| Kaloula pulchra Gray, 1831 | Banded bullfrog, Chubby frog | Southern and south-eastern Asia |
| Kaloula rigida Taylor, 1922 | Luzon narrow-mouthed frog | northern Philippines |
| Kaloula rugifera Stejneger, 1924 | South-western China | |
| Kaloula verrucosa Boulenger, 1904 | South-western China | |
| Kaloula walteri Diesmos, Brown & Alcala, 2002 | northern Philippines | |
Kaloula pulchra, Kaloula picta, and Kaloula borealis are the most widespread and commonly found varieties, often living near human settlements.
Blackburn, et al. (2013)[5] lists several Kaloula varieties that are likely to be new, previously undescribed species.
- Kaloula sp. nov. Palawan: Closely related to Kaloula baleata. Recorded in Palawan.
- Kaloula sp. nov. Sulawesi: Closely related to Kaloula baleata. Recorded in the Togian Islands (Batudaka Island), Central Sulawesi, and North Sulawesi (Bogani Nani Wartabone National Park).
- Kaloula sp. nov. Sibuyan: Closely related to Kaloula conjuncta. Recorded on Sibuyan Island and Mount Baloy, Panay.
- Kaloula sp. nov. Samar & Leyte: Related to Kaloula conjuncta and Kaloula picta. Recorded in Taft, Eastern Samar, and Danao and Baybay in Leyte.
- Kaloula sp. nov. Panay: Related to Kaloula kalingensis and Kaloula kokacii. Recorded in Sibalom, Antique Province, Panay.
- Kaloula sp. nov. East Luzon: Related to Kaloula kalingensis and Kaloula kokacii. Recorded on Mount Makiling, Sierra Madres, and Aurora Memorial National Park.
Phylogeny
A molecular phylogenetic study by Mo et al. (2013)[6] suggests that the only four Kaloula species found in China, namely Kaloula borealis, Kaloula nonggangensis, Kaloula rugifera, and Kaloula verrucosa, belong to a monophyletic group, termed the K. verrucosa group.
Blackburn, et al. (2013)[5] consider Kaloula species endemic to the Philippines to form a monophyletic group, containing the species Kaloula walteri, Kaloula rigida, Kaloula conjuncta, Kaloula picta, Kaloula kalingensis, and Kaloula kokacii. Kaloula likely colonized the Philippines from Southeast Asia during the Late Miocene, and then radiated into different ecotypes.[5] K. kalingensis and K. kokacii occupy niches as arboreal tree-hole frogs in northern and southern Luzon respectively, while K. rigida and K. walteri are ground frogs in northern and southern Luzon respectively. K. picta, which is a terrestrial ground frog, and K. conjuncta, which is scansorial (climbing) and prefers shrubs, have established themselves throughout the Philippine archipelago. K. picta as well as K. pulchra display the lowest internal genetic diversity, but also have widespread geographical distributions that may have likely occurred be due to human activity.
Excluding Kaloula taprobanica, the most recent common ancestor of Kaloula likely existed about 22.3 million years ago, around the Oligocene–Miocene boundary. The most recent common ancestor of the terrestrial species K. rigida and K. walteri likely lived 4.8 million years ago during the Early Pliocene, while that of the arboreal species K. kalingensis and K. kokacii likely lived 9.1 million years ago. The most recent common ancestor of K. conjuncta, which currently has four recognized subspecies, likely lived 4.4 million years ago.[5]
Blackburn, et al. (2013)[5] suggests that Kaloula taprobanica might not form a clade with the other Kaloula species, although it does clearly form a clade with Metaphrynella, Ramanella, and the rest of Kaloula.
Other studies relating to Kaloula phylogeny include van Bocxlaer et al. (2007),[1] Matsui et al. (2011),[7] and Trueb et al. (2011).[8]
The following phylogeny has been adapted from Blackburn, et al. (2013).[5] Kaloula assamensis, Kaloula taprobanica, and Kaloula aureata have not been included.
| Kaloula |
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References
- van Bocxlaer, I., K. Roelants, S. D. Biju, J. Nagaraju, and F. Bossuyt. 2006. Late Cretaceous vicariance in Gondwanan amphibians. PLoS ONE 1:e74.
- Frost, Darrel R. (2014). "Kaloula Gray, 1831". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 21 September 2014.
- "Kaloula macrocephala Bourret, 1942". Integrated Taxonomic Information System.
- "Microhylidae". AmphibiaWeb: Information on amphibian biology and conservation. [web application]. Berkeley, California: AmphibiaWeb. 2014. Retrieved 21 September 2014.
- Blackburn, D. C., Siler, C. D., Diesmos, A. C., McGuire, J. A., Cannatella, D. C. and Brown, R. M. (2013), An adaptive radiation of frogs in a southeast Asian island archipelago. Evolution, 67: 2631–2646.
- Mo Y, Zhang W, Zhou S, Chen T, Tang H, Meng Y, Chen W. 2013. A new species of Kaloula (Amphibia: Anura: Microhylidae) from southern Guangxi, China. Zootaxa 3710: 165-178.
- Matsui, M., A. Hamidy, D. M. Belabut, N. Ahmad, S. Panha, A. Sudin, W. Khonsue, H.-S. Oh, H.-S. Yong, J.-P. Jiang, and K. Nishikawa. 2011. Systematic relationships of Oriental tiny frogs of the family Microhylidae (Amphibia, Anura) as revealed by mtDNA genealogy. Mol. Phylogenet. Evol. 61:167–176.
- Trueb, L., R. Diaz, and D. C. Blackburn. 2011. Osteology and chondrocranial morphology of Gastrophryne carolinensis (Anura: Microhylidae), with a review of the osteological diversity of New World microhylids. Phyllomedusa 10:99–135.
- Chan KO, Grismer LL, Brown RM. 2014. Reappraisal of the Javanese Bullfrog complex, Kaloula baleata (Mueller, 1836) (Amphibia: Anura: Microhylidae), reveals a new species from Peninsular Malaysia. Zootaxa 3900: 569-580.
