Dorylaimus (Doryllium) groenlandicus, n. sp.

• Main Author: Ditlevsen, Hjalmar
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 1927
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Enoplea; Dorylaimida; Dorylaimidae; Dorylaimus; Dorylaimus groenlandicus; Greenland
• Online Access: https://doi.org/10.5281/zenodo.10830630; http://treatment.plazi.org/id/039AB11CFFABFF9833A0FB17FD6B8D38

Dorylaimus (Subg. Doryllium) groenlandicus n. sp. Locality: Disco. Above the Arctic Station. At a brook. 19. 8. 1926. Steinböck and Reisinger. Female: Length 2,5 mm. α 25; ß = 6; y = 50. Vulva 43,3 %. Only one specimen was secured, a fully developed female. Although this specimen in many respects agrees well with the D . macrodorus of DE MAN, so well that there can be no doubt about its belonging to the subgenus Doryllium , it differs, on the other side, so much from the European form that I have found it natural to establish a new species for the Greenland specimen. Most important is perhaps the size of the Greenland specimen which remarkably exceeds the dimensions indicated for European specimens, the length of which, according to MICOLETZKY, is between 0,9 and 117 mm. But in other respects too it differs rather considerably. In the front, end the body begins to taper at about the level of the base of the oesophagus; it then tapers evenly oeso- till the level of the proximal end of the spear, from where it tapers rather quickly unto the front end. The head isrounded, but lips obvious, and papillae were are observed; at its no no base the openings of the large lateral organs are situated; they are seen in profile in the figure 10. The spear is long and, as usual, it is possible to distinguish two parts, which are, in the species under con- sideration, of exactly the same length. According to the figure of DE MAN, the proximal part is in the European form, at any rate in the specimen figured, inconsiderably longer than the distal part. The two parts are very different in structure; the distal half consists of the proper spear, strongly chitinized on and thick-walled, the lumen in its interior is obvious but very narrow, and the apical opening is found GH the side immediately behind the tip. The proximal half is relatively weakly chitinized, and the lumen in its interior is increasing towards the base; it is provided with three projecting wings of a somewhat other shape than in the European species, the difference ...