Ichthydium chaetiferum ( Mueller , 1786)

Garraffoni, Andre R. S., Araujo, Thiago Q., Lourenco, Anete P. & Balsamo, Maria, 2010, New data on freshwater psammic Gastrotricha from Brazil, ZooKeys 60, pp. 1-12 : 5

Ichthydium chaetiferum ( Mueller, 1786) cf. Fig. 2Table 2

Ichthydium chaetiferum - Kisielewski (1991: 81, Figs 87-89, Tab. 37); Hummon (2007: 10); Balsamo et al. (2009: 14, Appendix 1); Kånneby et al. (2009: 35).

Material.

Água limpa: 1 specimen.

Description.

The description is based on a single adult specimen, 108.49 μm in total length. Head with five lobes and two pair of ciliary tufts, with a pair of large “ocellar” granules. Pharynx 28.30 μm in length from the posterior edge of the mouth to the pharyngo-intestinal junction, that is at U26. 8 Spines present on the ventrolateral body side.

Remarks.

The specimens collected in the present study resemble those described in Kisielewski (1991) due to the presence of a bulbous pharynx and “ocellar” granules. However, they can be distinguished from those in Kisielewski (1991) for the absence of the dorsal cephalic sensorial bristle and the number of spines in the ventrolateral body side (8 against 12).

Distribution.

Brazil: Diamantina (Minas Gerais State), Juréia Ecological Reserve ( São Paulo State).