Hypodontolaimus

• Main Authors: Huang, Yong, Gao, Qun
• Format: Other/Unknown Material
• Language: unknown
• Published: 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Adenophorea; Desmodorida; Chromadoridae; Hypodontolaimus; Antarc*; antarcticus
• Online Access: https://zenodo.org/record/5679983; https://doi.org/10.5281/zenodo.5679983

Key to the known and the new species of Hypodontolaimus 1 Precloacal supplements present in males.2 - Precloacal supplements absent in males. 9 2 Body longer than 1.5 mm. 3 - Body shorter than 1.3 mm. 4 3 Cephalic setae much shorter (1/6–1/5 hd long), 21–28 precloacal supplements. H. antarcticus - Cephalic setae 1hd long, 9 precloacal supplements. H. setosoides 4 Pharynx without distinct terminal bulb. 5 - Pharynx with distinct terminal bulb.6 5 Cephalic setae 2 hd long. H. setosus - Cephalic setae short than 1 hd long. H. abyssalis 6 19–24 precloacal supplements. H. balticus - Precloacal supplements less than 15.7 7 Cuticle with lateral differentiation of 2 longitudinal rows of dots, 8 precloacal supplements. H. marleenae - At least female cuticle with lateral differentiation of 4 longitudinal rows of dots. 8 8 Male with 2, female with 4 lateral longitudinal rows of dots, gubernaculum with anterior-lateral apophysis, 7 precloacal sup- plements. H. dimorphus - Both male and female with 4 lateral longitudinal rows of dots, gubernaculum without anterior-lateral apophysis, 11–15 preclo- acal supplements. H. inaequalis 9 Cephalic setae longer than 1 h.d. long. 10 - Cephalic setae shorter than 1 h.d. 15 10 Labial sensilla setose, pharyngeal bulb present.11 - Labial sensilla papillose, pharyngeal bulb absent. H. colesi 11 Gubernaculum with apophysis.12 - Gubernaculum without apophysis. 13 12 Body length longer than 500µm, apophysis of gubernaculum hooked. H. steineri - Body length shorter than 500µm, apophysis of gubernaculum not hooked. H. galapagensis 13 Gubernaculum well developed, spoon-shaped, halfe the length of the spicula. H. schuurmansstekhoveni - Gubernaculum reduced to a short plate, much shorter than half the length of the spicula. 14 14 Spicula nearly equal width throughout, distal blunt, 17 µm long. H. solivagus - Spicula tapering unevenly, distal pointed, 21µm long. H. interruptus 15 Cephalic setae 2/3 h.d long. 16 - Cephalic setae shorter than 0.5 h.d. 19 16 Gubernaculum with apophysis. 17 - ...