Galumna duplex, Mahunka & Mahunka-Papp, 2009

Mahunka, S. & Mahunka-Papp, L., 2009, New and little known oribatids from Kenya, with descriptions of two new genera (Acari: Oribatida), Journal of Natural History 43 (11 - 12), pp. 737-768 : 761-763

Galumna duplex sp. nov.

Diagnosis

Rostrum widely rounded. Surface partly finely striate. Lamellar and sublamellar lines well developed. Interlamellar setae long, slightly bacilliform. Sensillus long, its head lanceolate, pilose. Dorsosejugal suture well developed. On the notogaster four pairs of areae porosae and 10 pairs of setal alveoli present. All ventral setae minute. Lyrifissures iad in adanal position. A pair of large postanal porose areas present. All legs tridactylous.

Material examined

Holotype. Kenya, Muguga , near Nairobi, 20 November 2004. Leg. Cs. Csuzdi (Afr- 978). Nineteen paratypes from the same sample . Holotype (1716-HO-2006) and 15 paratypes 1716-PO-2006): HNHM, four paratypes: MHNG .

Measurements

Length of body 512–625 Mm, width of body 462–503 Mm.

Prodorsum

Rostral part of prodorsum wide, without characteristic apex. Basal part of prodorsum striated, ornamented by short, fine, dense dashes. Lamellar and sublamellar lines long, easily observed. Rostral and lamellar setae long, setiform, with fine distal end, lamellar setae arising between the lamellar and sublamellar lines. Interlamellar setae also long, slightly thicker than the preceding ones, blunt at tip. All three pairs distinctly pilose. Peduncle of the sensillus conspicuously long, thin, its head small, lanceolate, finely pilose.

Notogaster

Inner surface of the pteromorphae also finely striate, some stronger lines, directed outwards also observable ( Figure 11A ). Dorsosejugal suture distinct, its median part hardly convex, nearly straight. Sejugal porose area small. Ten pairs of setal alveoli and four pairs of areae porosae present. Porose area Aa oval, A 1 round and smaller than the oval A 2 and A 3. Lyrifissures ia located marginally. Males with rounder porose areas than the females.

Lateral part of podosoma

Both prodorsal lines well developed, gradually arching towards the margin of the coxisternal region ( Figure 11D ), running parallel to each other. Line L not reaching the insertion of interlamellar seta. Pedotecta I narrow. Circumpedal carina also conspicuously thick, reaching the lateral margins of the ventral plate.

Ventral regions ( Figure 11B )

Epimeral borders and apodema weakly developed, short. Epimeral surface ornamented by some irregular spots. Four pairs of epimeral setae present, all except setae 1a minute, the latter directed inwards, longer and distinctly ciliate. Three pairs of setae inserted on the anterior margin of the genital plates. Lyrifissures iad located at the anal aperture. A pair of conspicuously large, elongated, oval areae porose Ap present, located far from each other ( Figure 11C ).

Legs

All legs tri- and heterodactylous.

Remarks

The new species is well characterized by the long interlamellar setae, by the form of the sensillus, the prodorsal and the notogastral ornamentation, and first of all, two postanal porose areas. These features are unknown in this genus.

Etymology

It is named after the conspicuous number of postanal porose areas.

Figures

Figure 11. Galumna duplex sp. nov. (A) Body in dorsal view, (B) body in ventral view, (C) postetrior part of ventral plate, (D) prodorsum in lateral view.