''Euphlyctis karaavali'' (Karaavali skittering frog) is a species of

frog A frog is any member of a diverse and largely Carnivore, carnivorous group of short-bodied, tailless amphibians composing the order (biology), order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-f ...

in the family Dicroglossidae. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the southwestern coast of

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

Karnataka Karnataka (; ISO: , , also known as Karunāḍu) is a state in the southwestern region of India. It was formed on 1 November 1956, with the passage of the States Reorganisation Act. Originally known as Mysore State , it was renamed ''Karnat ...

Description

It is a large adult size frog with snout to vent length in males ranging between 55–69 mm and females being larger and up to 106 mm. The snout is obtusely pointed when observed from both dorsal and ventral planes and protrudes beyond the lower jaw. Tongue is spatulate and bifid without lingual papilla. Tympanum is distinct and a supra-tympanic fold from back of eye to forelimb is prominent. Head is wider than long. Skin on dorsum possess granulation.

Nuptial pad A nuptial pad (also known as thumb pad, or nuptial excrescence) is a secondary sex characteristic present on some mature male frogs and salamanders. Triggered by androgen hormones, this breeding gland (a type of mucous gland) appears as a spiked ...

on finger present in adult males. Two

vocal sac The vocal sac is the flexible membrane of skin possessed by most male frogs and toads. The purpose of the vocal sac is usually as an amplification of their mating or advertisement call. The presence or development of the vocal sac is one way o ...

s present and deep purple in coloration. Webbing between toes complete. Ventral side with brown reticulation, which gets dense towards the abdomen.

Sexual dimorphism

Males have

nuptial pads A nuptial pad (also known as thumb pad, or nuptial excrescence) is a secondary sex characteristic present on some mature male frogs and salamanders. Triggered by androgen hormones, this breeding gland (a type of mucous gland) appears as a spiked ...

. They also possess a pair of

s on the lower jaw. Adult females are larger than males.

Systematics

The

phylogenetic In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups o ...

position of ''Euphlyctis karaavali'', ascertained using a combination of 12s and 16s rRNA sequences, reveals a sister relationship with ''Euphlyctis aloysii'' and ''

Euphlyctis hexadactylus ''Euphlyctis hexadactylus'', also known as the green pond frog, Indian green frog, and Indian five-fingered frog, is a common species of aquatic frog found in Pakistan, India, Bangladesh, and Sri Lanka. The nominal taxon likely represents a specie ...

Distribution

This species was described from fallow agriculture fields in the coastal

village A village is a clustered human settlement or community, larger than a hamlet but smaller than a town (although the word is often used to describe both hamlets and smaller towns), with a population typically ranging from a few hundred to ...

Sanikatta Sanikatta is a twin village (combined with Talgeri) in Kumta taluk of Uttara Kannada district, Karnataka, India. This place is about a few square kilometres in extent. It is in the neighborhood of Gokarna, Devarbhavi, Torke and Tadadi port. The ...

within Kumta

Taluk A tehsil (, also known as tahsil, taluka, or taluk) is a local unit of administrative division in some countries of South Asia. It is a subdistrict of the area within a district including the designated populated place that serves as its administr ...

Uttara Kannada Uttara Kannada is a district in the Indian state of Karnataka. Uttara Kannada District is a major coastal district of Karnataka, and currently holding the title of the largest district in Karnataka. It is bordered by the state of Goa and Bela ...

District A district is a type of administrative division that, in some countries, is managed by the local government. Across the world, areas known as "districts" vary greatly in size, spanning regions or counties, several municipalities, subdivisions o ...

. Subsequently, the species was observed from six localities in

''viz.,'' Kodanga, Baire, Chendia, Kadwada, Tariwada, and Konaje. Recently, this species was reported from

Tiruvananthapuram Thiruvananthapuram (; ), also known by its former name Trivandrum (), is the capital of the Indian state of Kerala. It is the most populous city in Kerala with a population of 957,730 as of 2011. The encompassing urban agglomeration populatio ...

Kerala Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...

which is 810 km away from the type locality,

Ecology and natural history notes

It is a common frog species in the region where it is found and can found calling from rainwater inundated fallow agriculture fields, small manmade tanks, pools and puddles around human habitations. Advertisement vocalizations resemble calls of the white-throated kingfisher.

Etymology

The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

''karaavali'' is derived from the

Kannada Kannada (; ಕನ್ನಡ, ), originally romanised Canarese, is a Dravidian language spoken predominantly by the people of Karnataka in southwestern India, with minorities in all neighbouring states. It has around 47 million native s ...

name for the coastal region where it is found.

References

{{Taxonbar, from=Q51326739 karaavali Frogs of India Endemic fauna of India Amphibians described in 2016