''Adelosebastes'' is 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 "unisp ...

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of marine

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the subfamily

Sebastinae Sebastinae is a subfamily of marine fish belonging to the Family (biology), family Scorpaenidae in the Order (biology), order Scorpaeniformes. Their common names include rockfishes, rock perches, ocean perches, sea perches, thornyheads, scorpion ...

, the rockfishes, part of the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Scorpaenidae The Scorpaenidae (also known as scorpionfish) are a family (biology), family of mostly ocean, marine fish that includes many of the world's most venomous species. As their name suggests, scorpionfish have a type of "sting" in the form of sharp ...

. The only species in this genus is ''Adelosebastes latens'', the Aleutian scorpionfish. It is found in the northern Pacific Ocean.

Taxonomy

''Adelosebastes'' was formally described as a genus in 1979 by the

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, 35,800 species of fish had been described as of March 2 ...

s William N. Eschmeyer, Tokiharu Abe and Soji Nakano when they described its only species ''Adelosebastes latens''. ''A. latens'' was described from types collected at the Emperor Seamounts and the

Aleutian Islands The Aleutian Islands ( ; ; , "land of the Aleuts"; possibly from the Chukchi language, Chukchi ''aliat'', or "island")—also called the Aleut Islands, Aleutic Islands, or, before Alaska Purchase, 1867, the Catherine Archipelago—are a chain ...

. The generic name ''Adelosebastes'' is a compound of ''adelos'' which means "unseen" in

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

, the allusion was not explained, it likely refers to this species occurring in the "poorly explored" Emperor Seamount Chain at depths of ; and ''

Sebastes ''Sebastes'' is a genus of marine ray-finned fish belonging to the subfamily Sebastinae part of the family Scorpaenidae, most of which have the common name of rockfish. A few are called ocean perch, sea perch or redfish instead. They are found ...

'', the

type genus In biological taxonomy, the type genus (''genus typica'') is the genus which defines a biological family and the root of the family name. Zoological nomenclature According to the International Code of Zoological Nomenclature, "The name-bearin ...

of the subfamily

. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

, ''latens'', means secret in

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

, again the authors did not explain this allusion but it is probably in line with their use of ''adelos'' in the genus name.

Description

''Adelosebastes latens'' has 12 spines and 13 soft rays in its dorsal fin while the anal fin has 3 spines and 5 soft rays, the last ray being a double ray. The suborbital ridge has weak or no spines present and the pectoral fin may have two lobes. The overall colour in living specimens is bright crimson red, although this fades to yellowish in preserved specimens. In some specimens there may be dark markings on the nape and the back. There is normally a black mark on the rear of the gill cover and some black spots on the membranes of the dorsal and pectoral fins. There may also be three bands of indistinct black spots on the back. The maximum recorded standard length is . There are robust spines on the head which can be up to in length.

Distribution and habitat

''Adelosebastes latens'' is found in the northern Pacific Ocean and has been recorded from the length of the Emperor Sea Mount Chain, the most westerly and northern part of the Hawaiian–Emperor seamount chain which extends north from the western end of the

Northwestern Hawaiian Islands The Northwestern Hawaiian Islands also known as the Leeward Hawaiian Islands, are a series of islands and atolls located northwest of Kauai and Niihau, Niihau in the Hawaiian Islands, Hawaiian island chain. Politically, these islands are part of ...

to the Kuril–Kamchatka Trench. They are also found in the Aleutian Islands. This is a

bathydemersal Demersal fish, also known as groundfish, live and feed on or near the bottom of ocean, seas or lakes (the demersal zone).Walrond Carl . "Coastal fish - Fish of the open sea floor"Te Ara - the Encyclopedia of New Zealand. Updated 2 March 2009 T ...

fish which may be dound at depths between .

References

{{Authority control Sebastolobini Taxa named by William N. Eschmeyer Taxa named by Tokiharu Abe Taxa named by Soji Nakano Monotypic Perciformes genera Monotypic marine fish genera