Glyptosternon

Glyptosternon reticulatum on a 2021 stamp of Kyrgyzstan

Glyptosternon is a genus of sisorid catfishes native to Asia.

Species

There are currently four recognized species in this genus:^[1][2][3]

• Glyptosternon akhtari Silas, 1952
• Glyptosternon maculatum (Regan, 1905)
• Glyptosternon reticulatum McClelland, 1842 (Turkestan catfish)
• Glyptosternon oschanini Herzenstein, 1889 (Oshanin catfish)

Distribution

Glyptosternon species are distributed in Indus drainage in Afghanistan, Pakistan, India (in the state of Jammu and Kashmir), Uzbekistan, Tajikistan, Kyrgyzstan and western China, east to the Irrawaddy drainage in Burma.^[4] G. akharti is from the Bamian River of the Oxus Watershed of the Indus drainage in Afghanistan. G. maculatum is found in the Brahmaputra drainage of India and China. G. reticulatum is from the Indus drainage including Afghanistan, Pakistan, Kashmir, and western China.^[4] G. oschanini is known from the Upper Syr Darya and probably Amu Darya in Kyrgyzstan, Uzbekistan and Tajikistan ^[2]

Description

Exostoma is distinguished by having the combination of an interrupted groove behind the lip (post-labial groove), the gill openings extending onto the underside (venter), homodont dentition with pointed teeth in both jaws, a crescent-shaped tooth patch in the upper jaw, and 10–12 branched pectoral rays.^[4] The head is depressed with a broadly rounded snout. The body is elongate and flattened ventrally to the pelvic fins. The eyes are minute, dorsally located, and under the skin (subcutaneous). The lips are thick, fleshy, and papillated. The teeth in both jaws are pointed and the tooth patches in the upper jaw are joined, forming a band produced posteriorly at sides (crescent-shaped). The paired fins are plaited to form an adhesive apparatus.^[4]

G. maculatum and G. reticulatum grow to between 24.0–25.5 centimetres (9.4–10.0 inches).^[5][6]

Glyptosternon malaisei was known only from the type, which is from the Irrawaddy drainage in Burma. A recently published study reidentifies G. malaisei as a species of Glaridoglanis, on the basis of the spatulate, homodont dentition on both jaws and the premaxillary tooth patch not extending posterolaterally; and considers it to be a junior subjective synonym of Glaridoglanis andersonii.^[3]

Ecology

G. maculatum is found in mountain rapids.^[5] G. reticulatum is found in rivers and streams under stones and rocks. It feeds mainly on invertebrates, especially insect larvae.^[6]

References

Glyptosternon es un género de peces gato del orden de los siluriformes de la familia Sisoridae. Este género incluye cuatro especies: Glyptosternon akhtari, Glyptosternon maculatum, Glyptosternon malaisei, Glyptosternon reticulatum y Glyptosternon oschanini.^[1]​^[2]​

Distribución

Las especies Glyptosternon se distribuyen en lugares como el Río Indo en Afganistán, Pakistán, India (estado de Jammu y Cachemira), Uzbekistán, Tayikistán, Kirguistán, Birmania y el oeste de China.^[1]​ G. akhtari proviene de Bamiyán. G. maculatum se encuentra en el Brahmaputra de India y China. G. malaisei proviene del Río Irawadi de Birmania. G. reticulatum proviene también del río Indo en Afganistán, Pakistán, Cachemira y occidente de China.^[1]​ G. oschanini se conoce en el Alto Syr Darya y probablemente en Amu Darya en Kirguistán, Uzbekistán y Tayikistán.

Ecología

G. maculatum se encuentra en los rabiones de las montañas.^[3]​^[4]​ G. reticulatum se encuentran en ríos y arroyos bajo las piedras y rocas. Se alimentan principalmente de invertebrados, específicamente de larvas de insecto^[4]​

Referencias

Glyptosternon is een geslacht van straalvinnige vissen uit de familie van de zuigmeervallen (Sisoridae).

Soorten

• Glyptosternon akhtari Silas, 1952
• Glyptosternon maculatum (Regan, 1905)
• Glyptosternon malaisei Rendahl & Vestergren, 1941
• Glyptosternon reticulatum McClelland, 1842

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