Phallostethidae
Neostethus lankesteri
Kehl phallus fish ( Phallostethidae ) are a family of very small fish that live in Southeast Asia from Thailand to the Philippines and Sumatra in freshwater, brackish water and rarely also in the coastal sea.
Features
Kehl phallus fish are only 1.4 to 4.1 inches long. Your body is covered by cycloid scales, transparent, elongated and laterally flattened. The fish usually have two dorsal fins, the first, if present, with one or two short -fin rays, the second with 5 to 10 soft rays. More fins formula: Anal 13-28, pectoral 9-13
The females lack the pelvic fins. In the males, they are transformed into a throat- permanent copulatory organ ( Priapium ), which is used to hold the female during copulation and internal fertilization. The complex Priapium includes bones, muscles, outgrowths of the kidneys and gonads, as well as parts of the intestine. The males are asymmetrically constructed, with the Priapium on one side and the anus on the other side of the body. In most species, the number of males with a left - or right-sided Priapium same, but in some outweighs a guy. In females, the anus is on the center line of the base.
Kehl phallus fish are ovoviviparous. The eggs have fibrous growths.
Inside systematics
There are 21 described species in four genera:
- Tribus Gulaphallini Genus Gulaphallus Herre, 1925 Gulaphallus bikolanus
- Gulaphallus eximius
- Gulaphallus falcifer
- Gulaphallus mirabilis
- Gulaphallus panayensis
- Neostethus amari cola
- Neostethus bicornis
- Neostethus borneensis
- Neostethus Ctenophorus
- Neostethus djajaorum
- Neostethus lankesteri
- Neostethus palawanensis
- Neostethus robertsi
- Neostethus thessa
- Neostethus villadolidi
- Neostethus zamboangae
- Phenacostethus posthon
- Phenacostethus smithi
- Phenacostethus trewavasae
- Genus Phallostethus Regan, 1913 Phallostethus dunckeri
- Phallostethus lehi
- Phallostethus cuulong Shibukawa, Trần & Trần, 2012