Hermanniella dubiosa, Mahunka & Mahunka-Papp, 2007

Mahunka, S. & Mahunka-Papp, L., 2007, Taxonomical And Faunistical Studies On Oribatids Collected In Kenya (Acari: Oribatida) I., Acta Zoologica Academiae Scientiarum Hungaricae 53 (1), pp. 51-74 : 55-57

Hermanniella dubiosa sp. n.

( Figs 6–9 )

Diagnosis – Whole surface covered by secretion granules. Prodorsum with weak crests. Sensillus bacilliform, curved, comparatively long. All prodorsal setae – except setae ro and ex – bacilliform, interlamellar setae much longer than the sensilli. All notogastral setae – except the minute c 3 – bacilliform. Setae e 1, minute, setiform. Notogastral surface ornamented by alveoli. Epimeral setae spiniform, their formula: 3–1–3–3. Genitoanal setal formula: 7–1–2–3, all genital setae spiniform. Legs tridactylous.

Material examined – Holotype: Kenya, Nakuru district, Lac Naivasha : 08.11.1977. Leg. V . MAHNERT & J.-L. PERRET, (G 77/66). 30 paratypes from the same sample. Holotype and 15 paratypes: MHNG , 15 paratypes (1720- PO –2006): HNHM .

Measurements – Length of body: 582–651 µm, width of body: 360–416 µm.

Prodorsum: Strongly concave in lateral view ( Fig. 7 ), between the rostral and lamellar setae a distinct hollow present. Some weak crests observable, a pair directed to the lamellar alveoli, stronger than the others ( Fig. 6 ). Rostral setae setiform, sharply pointed, lamellar and interlamellar ones much stronger, curved bacilliform. The latter ones spiculate, rostral setae roughened. Exobothridial setae minute, arising on the lateral surface, thin, spiniform, curved backwards. Interlamellar setae much longer than the bacilliform sensilli, the latter ones finely roughened, the setae shortly aciculate, pilose or barbed ( Fig. 9 ).

Notogaster: Surface ornamented by roundish alveoli of various dimensions ( Fig. 8 ). Distance among them similar to the diameter of alveoli. All setae – except e 1 – nearly equal in length, bacilliform, distinctly pilose or barbed.

Lateral part of podosoma: Ratio of prodorsal setae as shown in Fig. 7 . Exobothridial setae arising near to the bothridia on the prodorsal surface.

Ventral regions: Infracapitulum and apodemes are typical for the genus. All epimeral setae spiniform, slightly pilose. Ventral plate ornamented by irregular ribs, anal plates alveolate. Genital setae also spiniform, 7 pairs arranged in two rows, 4 pairs medially, three pairs laterally. Anal and adanal setae varying in length, an 1 much longer than an 2 and ad 1 much longer than ad 2, ad 3 the longest of all. Lyrifissures iad located transversally, near to the anterior corner of the anal aperture.

Legs: Typical for the genus.

Remarks – The new species belongs to the “ congoensis ” group. The differential diagnosis is given in the “Remarks” of the next Hermanniella species.

Etymology – Named after the great similarity to the related species.

Figures

Figs 6–9. Hermanniella dubiosa sp. n. – 6 =body in dorsal view, 7 = anteriorpart of prodorsum inlateral view, 8 = sculpture of notogaster, 9 = sensillus