Oribotritia striata, Mahunka, 2009

Mahunka, S., 2009, Oribatid Mites From The Vohimana Reserve (Madagascar) (Acari: Oribatida) I., Acta Zoologica Academiae Scientiarum Hungaricae 55 (2), pp. 89-122 : 93-96

Oribotritia striata sp. n.

( Figs 6–9 )

Material examined. Holotype: Malagasy Republic, Vohimana Reserve , primary forest. 17. 04.

2008. Leg. CS. CSUZDI (Afr-996). Holotype (1768-HO-09) in HNHM.

Diagnosis. Aspis and notogaster with longitudinal striation. Two pairs of long and distinct lateral carinae. Sensillus dilated medially, setiform, roughened. Prodorsal setae long, rostral and interlamellar setae with spiniform, lamellar ones with filiform distal part. Three pairs of aggenital, one pair of anal and three pairs of adanal setae. Legs tridactylous, setae u on tarsi II–IV short, dilated, spiniform. Femora I with distal spur.

Measurements. Length of aspis: 357 µm, length of notogaster: 670 µm, height of notogaster: 455 µm.

Prodorsum. Rostral part of aspis striated. Median crista absent, two pairs of long and well sclerotised lateral carinae present ( Fig. 6 ). Both pairs reaching to the lateral margin of aspis. Median and basal part of the aspis without pattern. Ratio of prodorsal setae in> le> ro, setae le much thinner than the others, filiform. Setae ro and in with spiniform distal end. Sensillus ( Fig. 7 ) longer than the prodorsal and notogastral setae, spiniform, roughened, but slightly dilated medially.

Notogaster. Dorsomedian surface smooth, lateral part partly striated ( Fig. 8 ). Notogastral setae long, not shorter than rostral setae. Some of them (c 3 and p 3) thin, filiform, all others much thicker and blunter. All setae smooth.

Lateral part of podosoma. Bothridial squama well-developed, with a distinct dorsal line.

Ventral parts ( Fig. 9 ). Nine pairs of genital setae present, among them 4 pairs in kag position. Three pairs of aggenital setae longer than the preceding genital ones. Anal plates each with one short setae, adanal plates each with three similar setae. All setae in anal region shorter than the aggenital setae. Lyrifissures iad located between the ad 2 and ad 3 setae.

Legs. All legs triheterodactylous. Femur I with sharply pointed dorsal spur. Setae u on the tarsi II–IV short and wide.

Remarks. The new species belongs to the O. paraspinosa -group. It can be distinguished from its related species by the sculpture of the notogaster and by the three pairs of aggenital setae (see the key of Ethiopian Oribotritia taxons by NIEDBAŁA 1998, 2004, 2008).

Etymology. Named after the characteristic prodorsal and notogastral ornamentation.

Figures

Figs 6–9. Oribotritia striata sp. n.: 6 = body in lateral view, 7 = sensillus, 8 = anterior part of body in dorsal view, 9 = anogenital region