Parachiloglanis bhutanensis

Parachiloglanis bhutanensis, also known as the Khaling torrent catfish, is a species of catfish in the family Sisoridae first described in 2014. Prior to its discovery, the genus Parachiloglanis was considered monotypic.

Parachiloglanis bhutanensis
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Siluriformes
Family: Sisoridae
Genus: Parachiloglanis
Species:
P. bhutanensis
Binomial name
Parachiloglanis bhutanensis
Thoni & Gurung - 2014

Classification

Parachiloglanis bhutanensis is the first fish species scientifically described within Bhutan, whereas Parachiloglanis hodgarti was found in Pharping, Nepal. The common name, Khaling torrent catfish, refers to the village, Khaling, in the Trashigang District of southeastern Bhutan where the stream in which it was discovered flows.[1] A subsequent study by Thoni & Gurung in 2018 identified two specimens in the Bumdeling Wildlife Sanctuary in the northeast of Bhutan, expanding the previously known range of the species to throughout the upper Drangmechhu River.[2]

Description

Parachiloglanis bhutanensis has a brown, somewhat translucent body, with a pale yellow head. The average length of the specimens collected by Thoni & Gurung (2014) was 3 to 4 inches. The head is broad, blunt, and rounded, rising out of the body at roughly a 45-degree angle from the snout. Along the sides of the body, there is a lateral line of white pores.[3]

Parachiloglanis bhutanensis is different from the first Parachiloglanis species, Parachiloglanis hodgarti, by the lateral white pores running the length of the body, and differs from the other genera in the subfamily Glyptosterninae by the absence of a post-labial grove on the lower lip.[4]

Ecology

The first specimens of Parachiloglanis bhutanensis were discovered in the cascades of a small, fast-flowing stream, over 2,000 meters above sea level, while adhering to the underside of boulders. The initial streams near Khaling were fed by mountain springs, rainwater, and snow melted from nearby mountains, with very little algae. Thoni & Gurung speculated that the species evolved to a high-speed environment with paired fins to cling to rocks and a mouth that adapted to scraping invertebrates from the bottom of the streams.[1]

References
  1. Thoni, R. J.; Gurung, D. B. (1 October 2014). "Parachiloglanis bhutanensis, a new species of torrent catfish (Siluriformes:Sisoridae) from Bhutan". Zootaxa. 3869 (3): 306–312. doi:10.11646/zootaxa.3869.3.5. ISSN 1175-5334. PMID 25283918.
  2. Thoni, Ryan J.; Gurung, Dhan B. (13 September 2018). "Morphological and molecular study of the torrent catfishes (Sisoridae: Glyptosterninae) of Bhutan including the description of five new species". Zootaxa. 4476 (1): 40–68–40–68. doi:10.11646/zootaxa.4476.1.5. ISSN 1175-5334. PMID 30313340. S2CID 52976218.
  3. Vishwanath, Waikhom (23 July 2021). Freshwater Fishes of the Eastern Himalayas. Academic Press. ISBN 978-0-12-823608-6.
  4. "Researchers discover new catfish species in Bhutan". The Bhutanese. Retrieved 11 November 2021.
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