''Aracana aurita'', the Shaw's cowfish, painted boxfish, southern cowfish or striped cowfish, is a species 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

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 ...

Aracanidae Aracanidae, the deep sea boxfishes or temperate boxfishes, are a family of marine ray-finned fishes belonong to the order Tetraodontiformes, which also includes the pufferfishes, triggerfishes and ocean sunfishes. The fishes in this family are f ...

, the deepwater boxfishes or temperate boxfishes. This species is endemic to the seas off southern Australia.

Taxonomy

''Aracana auritia'' was first formally described in 1798 as ''Ostracion auritus'' by the Irish

biologist A biologist is a scientist who conducts research in biology. Biologists are interested in studying life on Earth, whether it is an individual Cell (biology), cell, a multicellular organism, or a Community (ecology), community of Biological inter ...

George Shaw with its type locality given as the "Islands of the Pacific Ocean", thought to be

Tasmania Tasmania (; palawa kani: ''Lutruwita'') is an island States and territories of Australia, state of Australia. It is located to the south of the Mainland Australia, Australian mainland, and is separated from it by the Bass Strait. The sta ...

. In 1838

John Edward Gray John Edward Gray (12 February 1800 – 7 March 1875) was a British zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828). The same is used for a z ...

proposed 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 ...

subgenus In biology, a subgenus ( subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between the ge ...

of ''

Ostracion ''Ostracion'' is a genus of Marine life, marine Actinopterygii, ray-finned fishes belonging to the Family (biology), family Ostraciidae, the boxfishes. These fishes are found in the Indo-Pacific region as far east as the eastern Pacific coasts of ...

'' which he named ''

Aracana ''Aracana'' is a genus of Marine life, marine Actinopterygii, ray-finned fishes belonging to the Family (biology), family Aracanidae, the deepwater boxfishes or temperate boxfishes. These fishes are Endemism, endemic to the waters around Australi ...

'', in 1866

Pieter Bleeker Pieter Bleeker (10 July 1819 – 24 January 1878) was a Dutch medical doctor, Ichthyology, ichthyologist, and Herpetology, herpetologist. He was famous for the ''Atlas Ichthyologique des Indes Orientales Néêrlandaises'', his monumental work on ...

formally designated ''O. aurita'' as 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 ...

of ''Aracana''. The 5th edition of ''

Fishes of the World ''Fishes of the World'' is a standard reference for the systematics of fishes. It was first written in 1976 by the American ichthyologist Joseph S. Nelson (1937–2011). Now in its fifth edition (2016), the work is a comprehensive overview of t ...

'' classifies this genus in the family Aracanidae which is in the

suborder Order () is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and recognized ...

Ostracioidea Ostracioidea or Ostracioidei, the boxfishes, is a suborder of ray-finned fishes belonging to the order Tetraodontiformes, which also includes the pufferfishes, filefishes and triggerfishes. The fishes in this taxon are found in the Atlantic, India ...

within 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 ...

Tetraodontiformes Tetraodontiformes (), also known as the Plectognathi, is an order of ray-finned fishes which includes the pufferfishes and related taxa. This order has been classified as a suborder of the order Perciformes, although recent studies have found ...

Etymology

''Aracana aurita'' is classified in the genus ''Aracana'', a name which was variously spelt by Gray as ''Acarana'' in 1833, ''Acerana'' in 1835 and ''Aracana'' in 1838. The 1838 name is the one used because it has become the most commonly used name. Grey did not explain the name but in 1835 he referred to boxfishes as "parrotfishes", so the name may refer the aracanga (''Macrocercus aracanga''), an old name for the

scarlet macaw The scarlet macaw (''Ara macao'') also called the red-and-yellow macaw, red-and-blue macaw or red-breasted macaw, is a large yellow, red and blue Neotropical parrot native to humid evergreen forests of the Americas. Its range extends from south ...

(''Ara macao''). 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 ...

''aurita'', means "eared", an allusion to the spines resembling horns above each eye, these horns together looking similar to a pair of ears.

Description

''Aracana aurita'' has 10 or 11 soft rays in the

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 ...

and in 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 ...

while there are 11 or 12 soft rays in both 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 ...

and

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 ...

. A stiff, boxy carapce made up of sculptured bony plates girds the body. This carapace has large recurved spines along its ridges. The dorsal and anal fins are set very far back on the body and are opposite each other. The bony plates on the

caudal peduncle 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 ...

are less well developed than the carapace but they almost form a complete band in adults. The lines on the snout are nearly horizontal. They show

sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di ...

in the colouration with the males having bright colouration with light blue wavy lines and spots on an orange background colour. The females and juveniles have a light orange to light brown overall colour marked with irregular brown and white sinuous lines or stripes. This species has 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 .

Distribution and habitat

''Aracana aurita'' is endemic to southern Australia from

Newcastle, New South Wales Newcastle, also commonly referred to as Greater Newcastle ( ; ), is a large Metropolitan area, metropolitan area and the second-most-populous such area of New South Wales, Australia. It includes the cities of City of Newcastle, Newcastle and Ci ...

south to

west to

Kalbarri, Western Australia Kalbarri is a coastal town in the Mid West region located north of Perth, Western Australia. The town is located at the mouth of the Murchison River, which has an elevation of . It is connected by public transport to Perth via Transwa coach s ...

. They are found in

seagrass Seagrasses are the only flowering plants which grow in marine (ocean), marine environments. There are about 60 species of fully marine seagrasses which belong to four Family (biology), families (Posidoniaceae, Zosteraceae, Hydrocharitaceae and ...

beds and offshorecrocky reefs in sheltered watres in bays, harbours and inlets at depths between .

Biology

''Aracana aurita'' prey on benthic invertebrates which they expose by blowing a jet of water into the substrate.

References

{{Taxonbar, from=Q774707 aurita Fish described in 1798 Taxa named by George Shaw