Guentherus
{{Short description|Genus of jellynose fishes}}
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| taxon = Guentherus
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Guentherus is a genus of jellynose fishes, belonging to the Ateleopodidae family, with two recognized species:{{FishBase genus|genus=Guentherus|month=February|year=2012}}
- Guentherus altivela Osório, 1917 (jellynose, highfin tadpole fish)
- Guentherus katoi Senou, Kuwayama & Hirate, 2008
The genus distinguishes itself from others in its family because of discrepancies in morphology. Guentherus has "3 free rays followed by 6–9 normal rays with membrane between them in the pelvic fins."{{Cite journal|last1=Schroeder|first1=Rafael|last2=Schwarz|first2=Richard|last3=Schwingel|first3=Paulo R.|date=July 2011|title=The occurrence of the jellynose fish Ijimaia antillarum in the south-western Atlantic|url=https://www.cambridge.org/core/journals/marine-biodiversity-records/article/abs/occurrence-of-the-jellynose-fish-ijimaia-antillarum-in-the-southwestern-atlantic/C6FD7BBF24B47567BACBE41412B3F064|journal=Marine Biodiversity Records|language=en|volume=4|doi=10.1017/S1755267211000595|doi-broken-date=13 January 2025|bibcode=2011MBdR....4E..59S |issn=1755-2672}} Other genera in this family have "a single long filament or 1 relatively developed ray plus 0 to 3 rudimentary rays."
Family: Ateleopodidae
{{main|Ateleopodidae}}
The family Ateleopodidae is made up of four genera and within that thirteen species: Ateleopus, Ijimaia, Parateleopus and Guentherus.{{FishBase|family=Ateleopodidae|access-date=2021-03-20}} Ateleopodids are located primarily near tropical and subtropical waters; with Ateleopus, Parateleopus, and Guentherus located in the Pacific and Ijimaia located in the Atlantic.{{Cite journal|title=View of Guentherus altivela Osorio, the first ateleopodid fish reported from the eastern Pacific Ocean|url=https://revistas.ucr.ac.cr/index.php/rbt/article/view/25828/26188|access-date=2021-03-20|journal=Revista de Biología Tropical|year=1977 |volume=25 |issue=2 |pages=179–190 |last1=Bussing |first1=William A. |last2=S |first2=Myrna I. López }}
File:FMIB 42725 Ateleopus plicatellus Gilbert, new species Type.jpegAteleopodids are commonly referred to as Jellynose fish or alternatively also called tadpole fish "because of their very soft and gelatinous snout."{{Cite book|editor-last=Hollingworth|editor-first=Chuck|title=The Living Marine Resources of the Western Central Atlantic. Volume 1: Introduction, molluscs, crustaceans, hagfishes, sharks, batoid fishes, and chimaeras. Volume 2: Bony fishes part 1 (Acipenseridae to Grammatidae). Volume 3: Bony fishes part 2 (Opistognathidae to Molidae), sea turtles and marine mammals. FAO Species Identification Guide for Fishery Purposes and American Society of Ichthyologists and Herpetologists Special Publication No. 5|date=27 April 2005|series=Fish and Fisheries|volume=6|issue=1|pages=89–90|doi=10.1111/j.1467-2679.2005.00172.x|issn=1467-2960}}
Genus: ''Guentherus''
The genus Guentherus was created by Balthazar Osorio in 1917 upon his discovery of Guentherus ativela species. The genus Guentherus differentiates from its other Ateleopodids because of their "posterior placement and structure of its pelvic fins-three free rays followed by a normal pelvic fin." They are a benthically dwelling ray-finned fish. Guentherus ativela is known to feed on copepods and polychaetas.{{Cite journal|last=Macpherson|first=Enrique|date=1989|title=Influence of geographical distribution, body size and diet on population density of benthic fishes off Namibia (South West Africa)|url=http://www.int-res.com/articles/meps/50/m050p295.pdf|journal=Mar. Ecog. Prog. Ser. |volume=50|pages=295–299|doi=10.3354/meps050295 |bibcode=1989MEPS...50..295M }}
Species
=''Guentherus katoi'' =
== Distribution ==
Guentherus katoi was named after Tatsuya Kato who collected the specimen. it has been found at depths of {{convert|1000|-|2000|ft|-1}}. The only specimens of G. katoi have been found off the coast of Southern Japan to the outlying southern Okinawa Islands.
= Physical description =
G. katoi is a scaleless Actinopterygii species with jaws, though lacking teeth.
- “Head and body pale pink, covered with many reddish to dark brown spots on nape to the lateral side of body.”
- “Dorsal fin reddish brown in lower half, blackish distally; some small dark brown spots on the basal part of dorsal fin.”
- “Pectoral fins reddish brown, blackish distally, and grayish in the lower part. Pelvic fins blackish except for 3 white, free rays.”
== Defining characteristics ==
G. katoi can be distinguished from other species in its genus because of its lack of lateral line and scales.{{cite journal|author=Senou, H.|author2= Kuwayama, S.|author3= Hirate, K. |year=2008|title= A new species of the genus Guentherus, (Ateleopodiformes: Ateleopodidae) from Japan|journal= Bulletin of the National Museum of Nature and Science|volume= 2|pages= 13–19 |url=https://www.kahaku.go.jp/research/publication/zoology/s2/S_02Senou_et_al.pdf}}
=''Guentherus altivela''=
Guentherus altivela Osório, 1917, original description in {{cite journal |author=Osório, B. |year=1917|title=Nota sôbre algumas espécies de peixes que vivem no Atlântico ocidental |trans-title=Note on some species of fish living in the western Atlantic|journal=Arquivo da Universidade de Lisboa|volume= 4|pages= 103-131, Pls. 29-36}}{{cite WoRMS|author=Bailly, Nicolas |year=2008 |title=Guentherus altivela Osório, 1917|id=272023 |access-date=2023-11-17}}
{{expand section|date=November 2023}}
Bibliography
- {{cite journal|author=Gerringer, M. E.|author2= Drazen J. C.|author3= Linley, T. D.|author4= Summers, A. P. |author5= Jamieson, A. J.|author6= Yancey, P. H. |year=2017|title= Distribution, composition and functions of gelatinous tissues in deep-sea fishes|journal=Royal Society Open Science|volume=4|issue=12 |doi=10.1098/rsos.171063|pmid= 29308245|pmc= 5750012}}
- {{cite journal|author=Prokofiev, A. M. |year=2006|title= New finding of Ateleopus purpureus Tanaka, 1915 (Ateleopodiformes: Ateleopodidae) in the Pacific waters of Japan|journal= Journal of Ichthyology|volume= 46 |issue=4 |pages=342–344|doi=10.1134/S0032945206040072|bibcode=2006JIch...46..342P}}