Spiked Flat Heads

Spiked Flat Heads
	Plectrogenium nanum
Systematics
	Spinefish (Acanthopterygii)
	Perch relatives (Percomorphaceae)
Order :	Perch-like (Perciformes)
Subordination :	Scorpionfish relatives (Scorpaenoidei)
Family :	Plectrogeniidae
Genre :	Spiked Flat Heads
Scientific name
	Plectrogenium
	Gilbert , 1905

The spiked flat heads ( Plectrogenium ( size : plectron = something to sting, genos = breed)) are a genus of small sea fish from the order of the perch-like (Perciformes).

There are two species, Plectrogenium barsukovi Mandrytsa, from 1992 from the southeastern Pacific and Plectrogenium nanum Gilbert, from 1905 from the central Indo-Pacific . The fish live at depths of 250 to 650 meters.

features

Plectrogenium species are only 5.15 to 6.8 cm long. Her body is flattened, her head has bony ridges and spikes. The gill membranes have not grown together on the isthmus . Your dorsal fin is supported by twelve spines and seven soft rays, the anal fin by three spines and five soft rays. The spines of the dorsal, anal and pelvic fins are connected to poison glands. The number of vertebrae is from 25 to 27.

Systematics

The systematic position of the fish is controversial. At Fishbase , they form their own, monogeneric family. The American ichthyologist Joseph S. Nelson assigns them to the scorpion fish (Scorpaenidae) as the subfamily Plectrogeniinae , but admits a possible relationship with the platycephaloidei ( flat heads and relatives). In the World Register of Marine Species , they are classified as a family of the suborder Platycephaloidei. At the beginning of 2018, Leo Smith and colleagues also placed the genus Bembradium in the family Plectrogeniidae and assigned them to the scorpionfish relatives (Scorpaenoidei).

literature

Joseph S. Nelson : Fishes of the World . John Wiley & Sons, 2006, ISBN 0-471-25031-7

Individual evidence

↑ Plectrogeniidae on Fishbase.org (English)
↑ World Register of Marine Species: Plectrogenium
↑ Smith, WL, Everman, E. & Richardson, C. (2018): Phylogeny and Taxonomy of Flatheads, Scorpionfishes, Sea Robins, and Stonefishes (Percomorpha: Scorpaeniformes) and the Evolution of the Lachrymal Saber. Copeia 106 (1): 94-119. 2018 doi: 10.1643 / CG-17-669

[1] Plectrogeniidae on Fishbase.org (English)

[2] World Register of Marine Species: Plectrogenium

[3] Smith, WL, Everman, E. & Richardson, C. (2018): Phylogeny and Taxonomy of Flatheads, Scorpionfishes, Sea Robins, and Stonefishes (Percomorpha: Scorpaeniformes) and the Evolution of the Lachrymal Saber. Copeia 106 (1): 94-119. 2018 doi: 10.1643 / CG-17-669