Korotkevitschia Friedrich 1968
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...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2005
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| Online Access: | https://zenodo.org/record/5689962 https://doi.org/10.5281/zenodo.5689962 |
| Summary: | 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 |
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