Pseudogobiopsis tigrellus

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Pseudogobiopsis tigrellus
Systematics
Perch relatives (Percomorphaceae)
Order : Gobies (Gobiiformes)
Family : Oxudercidae
Subfamily : Gobionellinae
Genre : Pseudogobiopsis
Type : Pseudogobiopsis tigrellus
Scientific name
Pseudogobiopsis tigrellus
( Nichols , 1951)

Pseudogobiopsis tigrellus (synonym: Gobius tigrellus ) is a species of fish from the subfamily of dwarf gobies ( Gobionellinae ) within the family of Oxudercidae . It occurs in western New Guinea .

features

Pseudogobiopsis tigrellus reaches a standard length of 21.0 to 25.5 mm. There are two dorsal fins with 10 rays each , 6 to 7 anal rays , two pectoral fins with 14 to 16 rays and 17 segmented caudal rays . The head and the body are transparent pearl gray with 12 to 14 narrow, black, vertical stripes on the sides of the body and on the back of the head. The back shows short black lines and spots. The front back section has irregular black spots and lines. The sides of the body are characterized by orange and pink-gold-colored speckles, which are most pronounced between the vertical stripes. On the sides of the head there are two slanted black lines that run over the cheeks at the lower edge of the eye. The gill cover shows a vertical black band at the back and two black spots in front. The area between the eyes and the mouth has irregular black lines and spots. The iris is silver. The tips of the lips are dull yellow with dark spots. The dorsal fins are transparent yellowish-white with black spots. In the males the dorsal fins have 5 to 6 irregular lines and in the females 4 black irregular lines with a wide black border and a dense black double blotch on the rear edge. The caudal fin is transparent with 8 to 10 vertical black lines. The caudal fin rays are yellowish. The anal fin is whitish-yellow. The ventral and pectoral fins are transparent.

distribution and habitat

Pseudogobiopsis tigrellus is endemic to the Mamberamo River system in western New Guinea . The species inhabits small, clear, relatively fast-flowing rainforest streams . The fish were always observed away from the main current along the edges of small pools at a depth of 10 centimeters. As a rule, they stay individually or in loose groups of two to four animals in the sand or on the rock bed.

Status and system

The IUCN classifies the species in the “ data deficient ” category . For a long time it was only known from the ten type specimens from 1939 before it was rediscovered in 2000. In 2009 the genus Gobius was classified into the genus Pseudogobiopsis .

literature

  • Allen, GR (1991): Field guide to the freshwater fishes of New Guinea . Publication No. 9 of the Christensen Research Institute, Madang, Papua New Guinea. The fishes of New Guinea .: 1-268.
  • Helen K. Larson : Review of the Gobiid Fish Genera Eugnathogobius and Pseudogobiopsis (Gobioidei: Gobiidae: Gobionellinae), with descriptions of three new species. The Raffles Bulletin of Zoology 2009 57 (1): p. 127-181. National University of Singapore
  • Nichols, JT (1951): Four new gobies from New Guinea . At the. Mus. Nov 1539: 1-8.

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