''Chaetodipterus'' is a

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 ...

es belonging to 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 ...

Ephippidae Ephippidae is a family of percomorph fishes, the spadefishes, in the order Moroniformes. These fishes are found in the tropical and temperate oceans of the world, except for the central Pacific. Taxonomy Ephippidae was first proposed as a fami ...

, the spadefishes. These fishes are found in the Atlantic and eastern Pacific Oceans.

Taxonomy

''Chaetodipterus'' was first proposed as a

monospecific genus 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 "unispe ...

in 1802 by the French

naturalist Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is cal ...

Bernard Germain de Lacépède Bernard-Germain-Étienne de La Ville-sur-Illon, comte de Lacépède or La Cépède (; 26 December 17566 October 1825) was a French natural history, naturalist and an active freemason. He is known for his contribution to the Comte de Buffon's g ...

with ''Chaetodon plumieri'', a species described by

Marcus Elieser Bloch Marcus Elieser Bloch (1723–1799) was a German physician and naturalist who is best known for his contribution to ichthyology through his multi-volume catalog of plates illustrating the fishes of the world. Brought up in a Hebrew-speaking Jewish ...

on 1787 from Jamaica, as its only species. ''Chaetodon plumieri'' is a

synonym A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are a ...

of ''Chaetodipterus faber''. This genus is classified within the family Ephippidae which is in the

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Moroniformes Moroniformes is an order of ray-finned fishes in the series Percomorpha. Families Moroniformes comprises three families according to the 5th edition of the ''Fishes of the World'': * Moronidae Jordan & Evermann, 1896 * Drepaneidae Gill, 1872 * ...

Etymology

''Chaetodipterus'' is a combination of ''di'', meaning "two", and ''pterus'', meaning "fin", prefixed with ''

Chaetodon ''Chaetodon'' is a tropical fish genus in the family (biology), family Chaetodontidae. Like their relatives, they are known as "butterflyfish". This genus is by far the largest among the Chaetodontidae, with about 90 living species included here, ...

''. This is a reference to the original genus the

type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ...

was assigned to but with a split dorsal fin.

Species

''Chaetodipterus'' contains three recognized species: *'' Chaetodipterus faber'' (

Broussonet Pierre Marie Auguste Broussonet (28 February 1761 – 17 January 1807) was a French naturalist who contributed primarily to botany. He was born in Montpellier, where he was educated, and travelled to Morocco, Spain, the Canary Islands, and Souther ...

, 1782) (Atlantic spadefish) *'' Chaetodipterus lippei''

Steindachner Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachner descri ...

, 1895 (West African spadefish) *''

Chaetodipterus zonatus The Pacific spadefish (''Chaetodipterus zonatus'') is a species of fish of the family Ephippidae. It is native to the eastern Pacific, from San Diego, California to Peru, including the Galápagos Islands where it is known as Chambo. Appearance ...

'' ( Girard, 1858) (Pacific spadefish)

Characteristics

''Chaetodipterus'' spadefishes have a highly compressed disc shaped body with a blunt snout and a small terminal mouth which bands of brush like teeth in its jaws. They have a continuous

dorsal fin A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found ...

with 9 low, well developed spines and between 18 and 23 soft rays. The spiny part of the dorsal fin is separated from the soft rays part by a deep incision. The

anal fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported o ...

is supported by 3 spines and 16 to 20 soft rays. The front portions of the soft dorsal fin and anal fin are elongated. The

pectoral fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish aquatic locomotion, swim. Apart from the tail or caudal fin, fish fins have no direct connection with the vertebral column ...

s are short while the long

pelvic fin Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hi ...

s sit under these. The

caudal fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only ...

is slightly concave. The head body and most of the fins are covered in scales and the

lateral line The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelia ...

is complete. The largest species is the Atlantic spadefish, with a maximum published

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

of while the smallest is the West African spadefish, which has a maximum published total length of .

Distribution

''Chaetodipterus'' comprises three

allopatric Allopatric speciation () – also referred to as geographic speciation, vicariant speciation, or its earlier name the dumbbell model – is a mode of speciation that occurs when biological populations become geographically isolated from ...

species, the Atlantic spadefish in the western Atlantic, the West African spadefish in the eastern Atlantic and the Pacific spadefish in the eastern Pacific.

References

{{Taxonbar, from=Q596898 Ephippidae Marine fish genera Taxa named by Bernard Germain de Lacépède