| Rogadius | |
|---|---|
 | |
| Rogadius asper syn. Platycephalus asper | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Scorpaeniformes |
| Family: | Platycephalidae |
| Genus: | Rogadius D. S. Jordan & R. E. Richardson, 1908 |
| Type species | |
| Platycephalus asper | |
Rogadius is a genus of marine, demersal ray-finned fish belonging to the family Platycephalidae. These fishes are native to the Indian Ocean and the western Pacific Ocean.
Rogadius was first formally proposed as a genus in 1908 by the American ichthyologists David Starr Jordan and Robert Earl Richardson with Platycephalus asper, which had been described in 1829 by Georges Cuvier from Nagasaki, designated as its type species. [1] [2] This genus is classified within the family Playtcephalidae, the flatheads which the 5th edition of Fishes of the World classifies within the suborder Platycephaloidei in the order Scorpaeniformes. [3]
Rogadius is a latinisation of rogad, an Arabic name for the bartail flathead (Platycephalus indicus). [4]
Rogadius contains seven species: [5] [6]
Rogadius flatheads have two or more preopercular spines have at least 2 spines on the preoperculum, with the upper spine being the longest. There is no elongation of the upper lobe of the caudal fin with no elongated filament extending out from that fin. The first dorsal fin has between 8 or 9 spines. the second being equal in height to the third, while the second dorsal fin has no more than 12 soft rays. There are 2 separate patches of vomerine teeth. There are between 48 and 56 pored scales, each with 2 pores, on the lateral line with spines on the scales in the anterior portion of that line. The diagonal rows of scales run downwards and backwards over lateral line and the number of these rows is roughly about equal to the number of scales in the lateral line, typically with a difference of only 1 or 2 scales. The head has bony ridges which have many fine serrations on them, There uis a single bony ridge on the side of the head underneath the eye with the lower margin of the suborbital not being clearly visible due to being turned inward. The lappet on the iris has two lobes. [7] The maximum length attained by these fishes varies from a standard length of 11.2 cm (4.4 in) in R. fehlmanni to a maximum total length of 50 cm (20 in) in R. pristiger. [5]
Rogadius flatheads are found in the Indian and Western Pacific Oceans from the Red Sea to Tonga, [8] north to southern Japan and south to Australia. [9]
The Platycephalidae are a family of marine fish, most commonly referred to as flatheads. They are relatives of the popular lionfish, belonging to the order Scorpaeniformes.
Platycephalus is a genus of mostly marine, demersal ray-finned fish belonging to the family Platycephalidae. They are found in the eastern Mediterranean, the Indian Ocean and western Pacific Ocean.
The tentacled flathead, also known as the Indian Ocean crocodilefish, Madagascar flathead or longhead flathead, is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. This species is in the western Indian Ocean, including the Red Sea and the Mediterranean, having invaded as a Lessepsian migrant through the Suez Canal. It is the only species in the monotypic genus Papilloculiceps.
Bembridae, the deep-water flatheads, are a family of bottom-dwelling ray-finned fishes. They are found in the Indian and western Pacific Oceans.
Bembras is a genus of marine ray-finned fish belonging to the family Bembridae, the deepwater flatheads. These fishes are found in the Indian Ocean and the western Pacific Ocean.
Platycephaloidei is a suborder of ray-finned fishes, part of the order Scorpaeniformes, and includes the flatheads, ghost flatheads and sea robins.
Hoplichthys, the ghost flatheads, is a genus of marine ray-finned fishes native to the Indian and Pacific Oceans. This genus is the only member of the family Hoplichthyidae.
Cociella is a genus of marine ray-finned fishes belonging to the family Platycephalidae, the flatheads. These fishes are found in the Indo-Pacific region.
Cymbacephalus is a genus of marine ray-finned fishes belonging to the family Platycephalidae, the flatheads. These fishes are found in the Indo-Pacific region.
The dwarf flathead is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. It is found in the Indo-Pacific. It is the only species in the monotypic genus Elates.
Grammoplites is a genus of marine ray-finned fishes belonging to the family Platycephalidae, the flatheads. These fishes are found in the Indo-Pacific region.
The spiny flathead, also known as the whitefin flathead or Bengal flathead, is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. It is found in the Indo-West Pacific region. This species is the only known member of its genus.
Ratabulus is a genus of marine, demersal ray-finned fish belonging to the family Platycephalidae. These fishes are native to the eastern Indian Ocean and the western Pacific Ocean.
Insidiator is a genus of marine, demersal ray-finned fish belonging to the family Platycephalidae. These fishes are native to the eastern Indian Ocean and western Pacific Ocean.
Sunagociais a genus of marine, demersal ray-finned fish belonging to the family Platycephalidae. These fishes are native to the Indian and Pacific oceans.
Thysanophrys is a genus of marine, demersal ray-finned fish belonging to the family Platycephalidae. These fishes are native to the Indian Ocean and the western Pacific Ocean.
Platycephalus laevigatus, the rock flathead, black flathead, grass flathead, king flathead, marbled-bellied flathead, Port Albert flathead, smooth flathead orSouthern rock flathead, is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. This species is endemic to Australia.
Platycephalus bassensis the Southern sand flathead, Bass flathead, bay flathead, common flathead, sand flathead, sandy, sandy flathead, slimy flathead or yanks, is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. It is endemic to Australia.
The crocodile flathead is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. It is found in the western Pacific Ocean.
The tuberculated flathead is a species of marine ray-finned fish belonging to the family Platycephalidae, the flatheads. This species is found in Indian and Western Pacific Oceans.