Armenteros, M.; Vincx, M.; Decraemer, W. (2009). Cienfuegia gen. nov. (Xyalidae) and Pseudoterschellingia gen. nov. (Linhomoeidae), two new genera of free-living marine nematodes from the Caribbean Sea. Journal of Natural History. 43(17-18): 1067-1081.
Armenteros, M.; Vincx, M.; Decraemer, W.
Cienfuegia gen. nov. (Xyalidae) and Pseudoterschellingia gen. nov. (Linhomoeidae), two new genera of free-living marine nematodes from the Caribbean Sea
Two new genera of nematodes are described from the Caribbean Sea.
Cienfuegia gen. nov. belongs to the Xyalidae based on the position of the
anterior gonad constantly left of the intestine, cuticle clearly striated, second
and third circle of anterior sensilla inserted at the same level and buccal cavity
surrounded by pharynx. The new genus is differentiated from other genera by
the buccal cavity divided in two chambers and by the four cephalic setae being
longer than the six outer labial setae. Within the Xyalidae, Cienfuegia shows
most affinities with the genera Daptonema and Theristus. Pseudoterschellingia
gen. nov. is placed within the Linhomoeidae on the basis of the presence of
anterior rounded amphidial fovea, unarmed narrow buccal cavity, distinctive
cardia and presence of apophysis of gubernaculum. Pseudoterschellingia is
closely related to the genera Terschellingia and Terschellingioides, but is
differentiated by the crypto-spiral amphidial fovea, and conical buccal cavity
surrounded by pharyngeal tissue.