Cosmozetes simplisetosus, Mahunka, 2005

Mahunka, S., 2005, Oribatid Mites (Acari: Oribatida) From Venezuela, I. Microzetid Species, Acta Zoologica Academiae Scientiarum Hungaricae 51 (4), pp. 287-311 : 296-298

Cosmozetes simplisetosus sp. n.

( Figs 9–11 )

Diagnosis: Rostrum simple, conical in dorsal and beak-shaped in lateral view. Lamellae very large, touching medially. Translamella present. Outer lamellar apices spiniform and long, inner ones very short, truncate. Interlameller setae arising on the lamellar surface, medially. Sensillus clavate, spiculate. Nine pairs of short and simple notogastral setae. Tutorium very long, with a spiniform distal end.

Material examined: Holotype: Venezuela, Sierra de La Culata , submontane rain forest dominated by Decusocarpus (experimental forest of ULA), La Carbonera, 11. 04. 2005. Leg. CS . CSUZDI & D. MURÁNYI (No. 26) . 1 paratype from the same sample. Holotype (1684-HO-05) and 1 paratype (1684-PO-05): HNHM .

Measurements: Length of body: 231–237 µm, width of body: 153–165 µm.

Prodorsum: Rostrum widely conical, projected in dorsal view, beak-shaped in lateral view ( Fig. 11 ). Lamellae very large, typical for the genus, touching antero-medially in a parallel line, and connected by a well-developed translamella in the basal part ( Fig. 9 ). Interlamellar region wide basally, on the translamella a large apophysis present medially. Lamellae with a very long spiniform outer, and a very short, truncate median apex, the latter bearing straight, spiniform lamellar setae. No deep hollow between the outer and the median apices. Bothridia comparatively small, well sclerotized. Sensillus directed outwards and forwards, its peduncle long, the head covered by long spines. Rostral setae setiform, simple, with a flagellate distal part, arising on large tubercles. Interlamellar setae very short, setiform, arising on the middle of lamellar surface.

Lateral part of podosoma ( Fig. 11 ): Tutorium very long, simple, spiniform, reaching over the insertion of the rostral seta. Rostral seta arsing on a wide tubercle. Pedotecta 1 with weak parallel lines on the distal margin. Pedotecta 2–3 and discidia well developed. No granulate or pustulate field in this region. Circumpedal carina reaching to the margin of the ventral plate.

Notogaster: Dorsosejugal suture nearly straight. Pteromorphae small, triangular. All notogastral setae very short, thin and simple, no essential difference among them. No setae in the median part, their position as show on Fig. 9 . Setae la arising on well-discernible tubercles.

Ventral regions ( Fig. 10 ): The shape of apodemes and epimeral borders characteristic, typical for the genus. Two complete transversal bands (bo. sej. and bo. 4) present. No longitudinal connection between them. Surface of epimer 4 ornamented by a weak polygonal pattern, all others nearly smooth. Epimeral setal formula: 3 – 1 – 3 – 3. All setae simple, short, setiform. Setae 1c arising far from pedotecta 1. Surface of epimeres 1–3 smooth, a well-discernible polygonal patern visible on epimeres 4. Among the genital setae, the anterior ones much longer and thicker than the others. Anogenital setal formula: 6 – 1 – 2 – 3. Setae ad 3 in paraanal position. Lyrifissure iad in adanal position.

Etymology: Named after the uniformly short and simple notogastral setae.

Figures

Figs 9–11. Cosmozetes simplisetosus sp. n.: 9 = body in dorsal view, 10 = body in ventral view, 11 = podosoma in lateral view