''Zanclorhynchus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of marine ray-finned fishes belonging to the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Congiopodidae Congiopodidae, commonly known as pigfishes, horsefishes and racehorses, is a family of ray-finned fish classified with in the order Scorpaeniformes. These fishes are native to the Southern Hemisphere. Taxonomy Congiopodidae was first formally ...

, the pigfishes or horsefishes. These fishes are found in the

Southern Ocean The Southern Ocean, also known as the Antarctic Ocean, comprises the southernmost waters of the World Ocean, generally taken to be south of 60° S latitude and encircling Antarctica. With a size of , it is regarded as the second-small ...

Taxonomy

''Zanclorhynchus'' was first described as a genus in 1880 by the German-born British

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish ( Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 33,400 species of fish had been described as of Octobe ...

Albert Günther Albert Karl Ludwig Gotthilf Günther FRS, also Albert Charles Lewis Gotthilf Günther (3 October 1830 – 1 February 1914), was a German-born British zoologist, ichthyologist, and herpetologist. Günther is ranked the second-most productive re ...

as a

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

genus, its only member being the new species Günther described in the same paper, ''Zanclorhynchus spinifer'', with its type locality given as

Kerguelen Island The Kerguelen Islands ( or ; in French commonly ' but officially ', ), also known as the Desolation Islands (' in French), are a group of islands in the sub-Antarctic constituting one of the two exposed parts of the Kerguelen Plateau, a large ...

. The 5th edition of ''

Fishes of the World ''Fishes of the World'' by the American ichthyologist Joseph S. Nelson (1937–2011) is a standard reference for fish systematics. Now in its fifth edition (2016), the work is a comprehensive overview of the diversity and classification of the ...

'' classifies this genus in the family Congiopodidae but other authorities classify it within the family Zanclorhynchidae, alongside the genus '' Alertichthys''. The genus name is a compound of ''zanklon'', which means "sickle", and ''rhynchus'', meaning "snout", assumed to be an allusion to the pointed snout of adult ''Z. spinifer''.

Species

''Zanclorhynchus'' contains 2 recognised species: * '' Zanclorhynchus chereshnevi'' Balushkin &

Zhukov Georgy Konstantinovich Zhukov ( rus, Георгий Константинович Жуков, p=ɡʲɪˈorɡʲɪj kənstɐnʲˈtʲinəvʲɪtɕ ˈʐukəf, a=Ru-Георгий_Константинович_Жуков.ogg; 1 December 1896 – ...

, 2016 (Chereshnev's horsefish) * ''

Zanclorhynchus spinifer ''Zanclorhynchus spinifer'', also known as the Antarctic horsefish or spiny horsefish, is a species of marine ray-finned fish belonging to the family Congiopodidae, the horsefishes or pigfishes. This fish is found in the Southern Ocean where it ...

'' Günther, 1880 (Antarctic horsefish)

Characteristics

''Zanclorhynchus'' horsefishes are characterised by having robust spines on the head. They have between 8 and 10 spines and 12 and 15 soft rays in the

dorsal fin A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through conv ...

with a deep incision separating the spiny part from the soft rayed part. The origin of the dorsal fin sits over the operculum. There are no spines in the

anal fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...

and the

pelvic fin Pelvic fins or ventral fins are paired fins located on the ventral surface of fish. The paired pelvic fins are homologous to the hindlimbs of tetrapods. Structure and function Structure In actinopterygians, the pelvic fin consists of two en ...

s are located on the abdomen, halfway between the throat and the

anus The anus (Latin, 'ring' or 'circle') is an opening at the opposite end of an animal's digestive tract from the mouth. Its function is to control the expulsion of feces, the residual semi-solid waste that remains after food digestion, which, d ...

. They have scales embedded in the skin, the scales all having a central spine which is curved. The maximum recorded

total length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish ...

is .

Distribution and habitat

''Zanclorhynchus'' horsefishes are found in the

where they have been recorded from

Prince Edward Islands The Prince Edward Islands are two small uninhabited islands in the sub-Antarctic Indian Ocean that are part of South Africa. The islands are named Marion Island (named after Marc-Joseph Marion du Fresne, 1724–1772) and Prince Edward Island ...

Crozet Islands The Crozet Islands (french: Îles Crozet; or, officially, ''Archipel Crozet'') are a sub-Antarctic archipelago of small islands in the southern Indian Ocean. They form one of the five administrative districts of the French Southern and Antarcti ...

Kerguelen Islands The Kerguelen Islands ( or ; in French commonly ' but officially ', ), also known as the Desolation Islands (' in French), are a group of islands in the sub-Antarctic constituting one of the two exposed parts of the Kerguelen Plateau, a large ...

Heard Island The Territory of Heard Island and McDonald Islands (HIMI) is an Australian external territory comprising a volcanic group of mostly barren Antarctic islands, about two-thirds of the way from Madagascar to Antarctica. The group's overall size ...

and

Macquarie Island Macquarie Island is an island in the southwestern Pacific Ocean, about halfway between New Zealand and Antarctica. Regionally part of Oceania and politically a part of Tasmania, Australia, since 1900, it became a Tasmanian State Reserve in 197 ...

as well as from the Kara-Dag Seamount to the north-east of the Prince Edward Islands. They are demersal fishes found at depths from .

References

{{Taxonbar, from=Q1844472 Congiopodidae Marine fish genera Taxa named by Albert Günther