Fejervarya sakishimensis

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Fejervarya sakishimensis
Systematics
Order : Frog (anura)
Subordination : Neobatrachia
Family : Dicroglossidae
Subfamily : Dicroglossinae
Genre : Fejervarya
Type : Fejervarya sakishimensis
Scientific name
Fejervarya sakishimensis
Matsui , Toda & Ota , 2007

Fejervarya sakishimensis is a species of amphibian from the order of the frogs. It belongs to the complex around Fejervarya limnocharis .

description

Fejervarya sakishimensis is a large species from the complex around Fejervarya limnocharis . The head-trunk length is 49 to 69 millimeters in females and 45 to 56 millimeters in males. The species differs from Fejervarya limnocharis in the greater length of the distance from the first toe to the inner metatarsal tubercle and, in relation to the head-trunk length, the smaller head, tibia, eyes and distance between the nostrils. Differences from Fejervarya multistriata are the larger tympanum , the wider head, features of the eyes, as well as longer forelimbs and first toes. Compared to Fejervarya iskandari , the head, tibia and hind limbs are shorter.

The clutch consists of 3300 to 3800 eggs. The eggs are 1.2 to 1.4 millimeters in diameter. The tadpoles are fully grown from head to tail end 32 millimeters long. The tooth formula is 2 (2) / 3 (1–2). During the metamorphosis, the head-trunk length is approximately 13 millimeters.

The chromosome number is 2n = 26. 5 of the chromosome pairs are large and 8 are small. Chromosome pairs 4, 8 and 11 are submetacentric while the rest are metacentric.

Occurrence and way of life

The species occurs on most of the southern Ryūkyū Islands . In addition, it was settled on three islands of the Daito group . Habitat of Fejervarya sakishimensis are wetlands, ditches and streams, rice fields and grassland with intermittent water areas in the plane. On the two islands of Ishigakijima and Iriomotejima it also occurs in the montane zone, where it can be found in high density on forest floors.

The spawning season extends from April to August. The eggs are deposited in various stagnant bodies of water such as rice fields, ponds and rain puddles. The spawn is attached to herbaceous plants in smaller or larger quantities. The metamorphosis of the tadpoles takes place from May to August.

The species is the anurans Bufo gargarizans miyakonis Okada, 1931, Rana (Odorrana) supranarina Matsui, 1994, Rana (Odorrana) utsunomiyaorum Matsui, 1994, Rana (Nidirana) okinavana Boettger, 1895, Rhacophorus owstoni (Stejneger, 1907), buergeria japonica (Hallowell, 1861) and Microhyla okinavensis Stejneger, found together in 1901.

Predators are the snakes Amphiesma concelarum , Amphiesma ishigakiense , Dinodon rufozonatum walli and Protobothrops elegans , the skink Plestiodon kishinouyei , the two birds serpent harrier ( Spilornis cheela perplexus ) and the big-billed crow ( Corvoteus macrorhynchos ) as well as the cat ( irioteus macrorhynchos ).

etymology

The species name Fejervarya sakishimensis is derived from Sakishima, an old Japanese name for the southern Ryukyu Islands.

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