Siambathynella Camacho, Watiroyram & Brancelj, 2011

Camacho, Ana I. & Leclerc, Philippe, 2022, A new species of the genus Siambathynella Camacho, Watiroyram & Brancelj, 2011 (Crustacea, Bathynellacea, Parabathynellidae) from a Thai cave, Subterranean Biology 44, pp. 139-152 : 139

Genus Siambathynella Camacho, Watiroyram & Brancelj, 2011

Amended genus diagnosis.

after Camacho, Watiroyram and Brancelj, 2011.

Antennule seven-segmented, without aesthetascs on the fifth article and with subterminal aesthetascs on the last article, sexually dimorphic, with a male antennal organ on the second article of the antennule. Antenna seven-segmented, first, second and fifth articles without setae. Mandible with expanded distal claw on pars molaris. Maxilla with four articles. Exopod of thoracopods II to VII each two-segmented, that of ThI one-segmented; basipod of thoracopods I to VII with one smooth seta; epipod of ThI absent. Male thoracopod VIII: almost square, with small endopod integrated into basipod and one or two smooth long setae; inner lobe incorporated into basal region, slightly shorter than dentate lobe; basipod very large, almost square and with a row of small denticles on the distal part, proximal side with two lobes, one of which is curved inwards and almost completely covers the exopod, without setae. Female thoracopod VIII: with two long setae. Pleopods absent. Ventro-lateral seta of pleotelson located adjacent to the insertion of the furca. Inhomonomous uropod sympod with a row of spines occupying the distal half; endopod with a spinous projection on the distal outer corner and with one thick spine covered with setules.

Type species.

Siambathynella laorsriae Camacho, Watiroyram & Brancelj, 2011.