Teratocephalus decarinus Anderson 1969

Teratocephalus decarinus Anderson, 1969 (Fig. 6, A -C) Dimensions often females: L = 0. 52- 0.56 mm; a = 23 -24; b = 3.7 -3.9; c = 4.8 - 5.7; V = 1 3 _1 8 54 -5 8. First two annules behind lip region small and compressed; the next four to six are directed anteriad. Vulva depressed; a short postvulva...

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Bibliographic Details
Main Author: P. A. A. LOOF
Format: Other/Unknown Material
Language:unknown
Published: Zenodo 1971
Subjects:
Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Rhabditida
Teratocephalidae
Teratocephalus
Teratocephalus decarinus
Spitzbergen
Online Access:https://doi.org/10.5281/zenodo.8152824
http://treatment.plazi.org/id/03C67B2BB403FFF1FF49FE2DFE363D1B
Description
Summary:Teratocephalus decarinus Anderson, 1969 (Fig. 6, A -C) Dimensions often females: L = 0. 52- 0.56 mm; a = 23 -24; b = 3.7 -3.9; c = 4.8 - 5.7; V = 1 3 _1 8 54 -5 8. First two annules behind lip region small and compressed; the next four to six are directed anteriad. Vulva depressed; a short postvulval sac is present. The tail measures 9-11 anal body diameters; vulva-anus distance is 138 -145 % of tail length. Samples 62, 66 and 67. The distinction between this species and T.costatus Andrässy, 1958 is somewhat problematical. A population from New Galloway, Scotland, is clearly T. costatus because of the shape of the neck annules, but the cervical expansion characteristic of that species is absent, as in T. decarinus. Specimens from the island of Terschelling, The Netherlands, have the characters of T. decarinus, but a juvenile has the neck annules shaped as in T. costatus. Clear differences in tail tip and shape of body annules could not be found between all these populations. So for the moment the only established difference is the shape of the neck annules: directed anteriad in decarinus, not so in costatus. Whether this difference is really of specific importance remains to be seen. T. decarinus is now known from northern Canada, Spitzbergen, Sweden (Flommen) and Scotland; T.costatus from Bulgaria and the Netherlands. The species has also been reported from Paraguay (Andrässy, 1968). Published as part of P. A. A. LOOF, 1971, FREELIVING AND PLANT PARASITIC NEMATODES FROM SPITZBERGEN, COLLECTED BY MR. H. VAN ROSSEN, pp. 1-86 in Mededelingen Landbouwhogeschool Wageningen 71 on page 31, DOI: 10.5281/zenodo.8152982

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