Sabahtritia dongnaiensis Niedbała, 2013

Niedbała, Wojciech & Ermilov, Sergey G., 2013, Ptyctimous mites (Acari, Oribatida) from Southern Vietnam with descriptions of three new species, Zootaxa 3608 (6), pp. 521-530 : 526-527

Sabahtritia dongnaiensis Niedbała sp. nov.

( Fig. 3 )

Measurements of holotype. Prodorsum: length 260, height 104, width 190, sensillum 172, interlamellar setae 152, lamellar setae 228, rostral setae 177, exobothridial setae 33. Notogaster: length 480, height 217, width 303, c 1 152, h 1 177, p 1 164. Anogenital region: length of ventral plate 394, width of ventral plate 222.

Integument. Colour dark brown. Integument of body, especially of notogaster and ventral plate, covered with small alveoli. Prodorsum surface smooth.

Prodorsum with long, thick lateral carinae, below them two narrow shorter carinae present. Bothridial scale above and posterior of bothridium. Sensilla long, setiform, narrower than prodorsal setae, covered unilaterally with 23 small cilia. Setae long, thick, rough, flagellate at tip, interlamellar setae shortest and less narrow than rostral and lamellar setae, distance between lamellar setae similar as that between interlamellar setae, distance between interlamellar and lamellar setae very short, similar to size of bothridium, exobothridial setae minute.

Notogaster with 14 pairs of relatively long (c = c 1– d 1), rigid, thick, rough setae, flagellate distally. Setae from c 1 to cp located in typical to Sabahtritia diagonal row. Five pairs of lyrifissures present.

Ventral region. Mentum of subcapitulum with setae h considerably longer than distance between them. One pair of deep hollows in anterior part of genital region, typical for genus. Genitoaggenital region with six pairs of minute, spinose setae in progenital position, four pairs of long, thick, rough setae, similar to notogastral setae located posterior to them in transversal row; three pairs of long, thick and rough anal setae and three pairs of adanal setae similar to notogastral setae, setae ad 3 removed from paraxial margin.

Legs heterotridactylous. Chaetome of legs (without tarsi): I 1–3 –5(2)–5(1), II 1–3 –4(1)–4(1), III 2–2 –3(1)–3(1), IV 2–1 –2(0)–3(1).

Material examined. Holotype: L-12; four paratypes: L-13

Comparison. The new species differs from all Sabahtritia species by the strongly dimorphic shape of genital setae, six pairs short spinose and four pairs long, thick and rough setae, thick and long lateral carinae of prodorsum.

Etymology. The specific epithet refers to the locality of this species Dong Nai Province.

Remark. Lions and Norton (1998) presented seven morphological characters distinguishing Synichotritia and Sabahtritia . However we consider that only two of them distinctly distinguish both genera: a pair of deep hollows in the anterior part of genital region and ventral plates broadest medially (typical for Sabahthitia).

Figures

FIGURE 3 A – G. Sabahtritia dongnaiensis Niedbała sp. nov.: A, prodorsum, dorsal view; B, prodorsum, lateral view, C, ventral view of opisthosoma, D, genitoaggenital region; E, mentum of subcapitulum; F, lateral view of opisthosoma, G, claws of leg.