Korotkevitschia Friedrich 1968

• Main Author: Chernyshev, Alexei V.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2005
• Subjects: Biodiversity; Taxonomy; Animalia; Nemertea; Enopla; Monostilifera; Cratenemertidae; Korotkevitschia; Antarc*; Antarctica
• Online Access: https://doi.org/10.5281/zenodo.5689962; http://treatment.plazi.org/id/03FD9E73FFCB103FFEF310C024B61125

Genus: Korotkevitschia Friedrich, 1968 Generic diagnosis : Pelagic hoplonemerteans with modified monostiliferous proboscis armature; bulb region and bulb duct not developed; basis, central stylet and diaphragm absent; two accessory stylet pouches with posterior opening; rhynchocoel reaches posterior end of body; rhynchocoel wall with interwoven musculature; mouth and rhynchodaeum open separately; precerebral septum closed; body wall with non­fasciated diagonal muscles; longitudinal musculature not anteriorly divided, with honeycomb fascial substructure; dorso­ventral musculature weakly developed; longitudinal stomach musculature present; frontal organ present; eyes absent; frontal, cephalic and submuscular glands present in precerebral region; cerebral organs lie beside brain and reach behind dorsal ganglia, cerebral organ canals branched, with two distinct kinds of epithelium; cerebral organ furrows lack secondary grooves; cerebral ganglia with neither neurochord cells nor inner neurilemma; lateral nerve cords without accessory nerve, with a thin band of connective tissue with numerous myofibrils; foregut divisible into stomach and pyloric region; intestinal caecum with lateral pouches only; lateral intestinal pouches large and lobed; very long rectum with well­developed sphincter of circular muscle fibres; blood system simple, without pseudometameric transverse connectives; mid­dorsal vessel with single vascular plug; excretory system well developed, opening to exterior in midbody region; testes lie in posterior quarter of the intestinal region, gonadal muscle meshwork not developed. Type species: Cratenemertes pelagicus Korotkevitsch, 1961. Published as part of Chernyshev, Alexei V., 2005, Redescription of Korotkevitschia pelagica (Korotkevitsch, 1961) (Enopla: Hoplonemertea: Cratenemertea), a pelagic nemertean from Antarctica, pp. 1-14 in Zootaxa 862 on page 2, DOI: 10.5281/zenodo.170850