Atropacarus (Hoplophorella) stenos, Niedbała, Wojciech & Starý, Josef, 2014

Niedbała, Wojciech & Starý, Josef, 2014, New species of Atropacarus (Hoplophorella), (Acari, Oribatida, Phthiracaridae) from the Afrotropical Region, Zootaxa 3774 (1) : -

Atropacarus (Hoplophorella) stenos sp. nov.

( Figs. 5A–G )

Measurements of holotype. Prodorsum: length 210, width 139, height 96; sensillum 33, setae: in, le, ro 20; notogaster: length 404, width 222, height 247; setae: c 1, h 1 and p 1 40; genitoaggenital plate 114 x63; anoadanal plate 126 x63.

Description. Colour dark brown. Surface of body covered with strong cerotegument and small concavities.

Prodorsum ( Figs. 5A–B ) with powerful median crista but without lateral carinae and posterior furrows. Sigillar fields invisible. Sensilli short, club-shaped; setae short, needleform, similar in length, exobothridial setae vestigial.

Notogaster ( Figs. 5C–D ) with strong anterior cowl; setae short (c 1 <1/2 c 1- d 1), needleform setae, Setae c 1-3 situated on cowl, slightly remote from anterior margin, c 2 distinctly further. Vestigial setae not visible. Two pairs of lyrifissures ia and im present.

FIGURE 4A–E. Atropacarus (Hoplophorella) othneios sp. nov. (paratype from MAG-205). A, prodorsum, dorsal view, B, lateral view of body, C, seta c1, D, genitoaggenital and anoadanal plates, E, trochanter and femur of leg I.

Ventral region. ( Figs. 5E–F ). Setae h of mentum considerably shorter than distance between them. Genitoaggenital plates with 9 pairs of setae with formula: 9(4+2): 3. Anoadanal plates with short, needleform, similar in length setae, 2 anal and 3 adanal.

Legs. Formulae of setae and solenidia of “complete type ”; big setae d on femora I distinctly remote from distal end of article.

Material examined. Holotype and 12 paratypes are deposited at DATE from locus typicus: TAN-006, Tanzania, Nguru Mts., Turiani, 5. XI. 2010, 06 °06'24" S, 37°31'48" E, altitude 1236m, decidous forest on steep slope, sample of leaf litter sifting, leg. V. Grebennikov. Eleven paratypes are deposited at ISB and ten paratypes at NHMG, from localities: TAN-007, Tanzania, Nguru Mts., Turiani, 3. XI. 2010, 06 °06'24" S, 37°31'48" E, altitude 1236m, decidous forest on steep slope, sifting sample of leaf litter, leg. V. Grebennikov, and TAN-016, Tanzania, Uluguru Mts., Bunduki village, 26. XI. 2010, 07 °01'17" S, 37°39'10" E, altitude 1592m, mid-altitude afromountaine deciduous forest, sifting sample of leaf litter, leg. V. Grebennikov.

Etymology. The specific name stenos is Greek for “somewhat narrow” and refers to the narrow shape of notogaster.

Comparison. The new species is very similar to A. (H.) minisetosus ( Mahunka, 1978) because of the shape of its sensilli and setae and the arrangement of its genital and anoadanal setae, but is easily distinguishable by the presence of the anterior cowl of its notogaster and its unusual arrangement of setae in row p of its notogaster, in that p 1 is situated above the line of p 2-4 setae (while all the setae p positioned in one line in A. (H.) minisetosus ) ( Mahunka 1978).

Figures

FIGURE 5 A – G. Atropacarus (Hoplophorella) stenos sp. nov. (holotype). A, prodorsum, dorsal view, B, prodorsum, lateral view, C, opisthosoma, lateral view, D, dorsal view of notogaster, E, genitoaggenital and anoadanal plates, F, mentum of subcapitulum, G, trochanter and femur of leg I.