Angursa capsula Bussau, 1992

Fujimoto, Shinta & Hansen, Jesper Guldberg, 2019, Revision of Angursa (Arthrotardigrada: Styraconyxidae) with the description of a new species from Japan, European Journal of Taxonomy 510, pp. 1-19 : 8

Angursa capsula Bussau, 1992

Fig. 5

Material examined

All three specimens were collected from a manganese nodule area off Peru, but it is not clear whether the paratypes observed in this study were collected with the holotype or at a nearby site on a different day since the museum catalogue numbers were not mentioned in the original description ( Bussau 1992).

Holotype PACIFIC OCEAN • adult ♀; tropical SE Pacific, Peru Basin, collected from a manganese nodule area off Peru, 4140–4170 m deep; 07°03′84″ S, 88°28′15″ W; 17 Feb. 1989; SMF 28 .

Paratypes

PACIFIC OCEAN • 2 specimens collected from a manganese nodule area off Peru; SMF 29 , SMF 30 .

Remarks

The re-examination of the type material revealed the presence of the paired globular body fringing the mouth in the holotype ( Fig. 5A ), the shallow bases of the primary clavae and the lateral cirri which we do not regard as pedestals, and the morphology of the leg IV sensory organs ( Fig. 5B ) to be not significantly different from those of A. abyssalis and A. clavifera ( Renaud-Mornant 1981; Noda 1985). The third point is especially important as its “capsule-shaped” leg IV sensory organ has been the primary diagnostic character for this species ( Bussau 1992). The seconday and tertiary clavae were now very difficult to observe in the holotype. They were observed in SMF 29, but their complete contours were difficult to recognize.

Figures

Fig. 5. Micrographs of Angursa capsula Bussau, 1992 (SMF 28). A. Cephalic region with paired globular bodies (black arrowheads). B. Caudal region.