Lohmannia (Carolohmannia) monosetosa, Ermilov, Sergey G. & Anichkin, Alexander E., 2014

Ermilov, Sergey G. & Anichkin, Alexander E., 2014, Taxonomic study of oribatid mites (Acari, Oribatida) of Bi Dup — Nui Ba National Park (southern Vietnam), Zootaxa 3834 (1), pp. 1-86 : 10-15

Lohmannia (Carolohmannia) monosetosa sp. nov.

( Figs. 3–6 )

With character states of the genus Lohmannia Michael, 1898 as summarized by Grandjean (1950) and the subgenus Lohmannia (Carolohmannia) Norton, Metz & Sharma, 1978 as summarized by Norton et al. (1978).

Diagnosis. Body size 1162–1294 × 763–863. Rostral and anterior exobothridial setae phylliform, serrate; lamellar, interlamellar, posterior exobothridial and notogastral setae setiform, smooth. Bothridial setae setiform, slightly serrate unilaterally. Notogastral transverse bands complete. Epimeral setae 1b, 3a, 3b, 4a, 4b setiform; others phylliform. Genital setae similar in length.

Description. Measurements. Very large species. Body length 1228 (holotype: female), 1162–1294 (three paratypes: all females); body width 780 (holotype), 763–863 (four paratypes).

Integument. Body color yellow-brownish to red-brownish. Surface of body foveolate; foveolae very small (less than 1, distinctly visible only under high magnification). Porose areas larger (up to 6) than foveolae, forming transverse bands on notogaster.

Prodorsum. Rostrum widely rounded. Rostral (ro, 116–132) and anterior exobothridial (exa, 99) setae phylliform, dilated in medial part, weakly serrate. Lamellar (le), interlamellar (in) and posterior exobothridial (exp) setae similar in length (282–365), setiform, smooth. Bothridial setae (ss, 232–249) setiform, thickened, slightly serrate unilaterally. Postbothridial transverse band (S b) well visible.

Notogaster. Anterior notogastral margin weakly convex medially. Nine transverse bands (S 1– S 9) distinct, all complete. Sixteen pairs of notogastral setae long (282–332, posterior setae in some specimens up to 398), setiform, smooth.

Gnathosoma. Subcapitulum with one pair of lateral tubercles. Subcapitulum longer than wide (298–332 × 282). Subcapitular setae similar in length (77–82), smooth; h, m 1, m 2 phylliform, a setiform. Three pairs of adoral setae present: or 1 (45–49) wide, lobe-formed, weakly concave distally, smooth; or 2 (69–73) setiform, thickened, with strong spine in distal part; or 3 (53–61) setiform, thickened, smooth. Palps (164) with setation 0–1–0–1–10(+ω). Distal three setae connected basally. Solenidion little longer than palptarsus, thick, not fused with acm. Chelicerae (323–328) with two cheliceral setae; chb (77–82), setiform, smooth, cha (10–12) thorn-like.

Epimeral and lateral podosomal regions. Apodemes (1, 2, sejugal, 3, 4) well visible. Epimeral setal formula: 3–1–3–4. Setae 1b, 3a, 3b, 4a, 4b (83) setiform, with one to two barbs; others (66–83) phylliform, serrate.

Anogenital region. Ten pairs of genital setae (g 1– g 10, 66–83) setiform, with one to two barbs. One pair of anal (an, 66–99) and four pairs of adanal (ad 1, 215; ad 2– ad 4, 149–182) setae setiform, smooth.

Roman letters refer to normal setae (e to famulus), Greek letters to solenidia, d σ—seta and solenidion coupled. Single prime (') marks setae on anterior and double prime (") setae on posterior side of the given leg segment. Parentheses refer to a pair of setae.

Type material. Collection data for holotype (female): locality 2 (soil); collection data for four paratypes (all females): locality 6 (soil).

Type deposition. The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; three paratypes are deposited in the collection of the Siberian Zoological Museum, Novosibirsk, Russia; one paratype is deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology. The specific name “ monosetosa ” refers to the one seta on each anal plate.

Remarks. The subgenus Lohmannia (Carolohmannia) comprises only the type species, Lohmannia (Carolohmannia) carolensis Norton, Metz & Sharma, 1978 , which is distributed in U.S.A. ( Norton et al. 1978). Lohmannia (Carolohmannia) monosetosa sp. nov. differs from the latter by the serrate bothridial setae (versus with long branches in L. (C.) carolensis ), phylliform rostral setae (versus setiform in L. (C.) carolensis ), setiform posterior exobothridial setae (versus phylliform in L. (C.) carolensis ), smooth lamellar, interlamellar and notogastral setae (versus serrate in L. (C.) carolensis ), complete notogastral transverse bands (versus interrupted medially in L. (C.) carolensis ) and genital setae similar in length (versus heterotrichous in L. (C.) carolensis ).

Figures

FIGURE 3. Lohmannia (Carolohmannia) monosetosa sp. nov., adult: dorsal view. Scale bar 300 Μm.

FIGURE 4. Lohmannia (Carolohmannia) monosetosa sp. nov., adult: ventral view (gnathosoma and legs except trochanters I, II omitted). Scale bar 300 Μm.

FIGURE 5. Lohmannia (Carolohmannia) monosetosa sp. nov., adult: A—rostral seta; B—exobothridial seta exa; C—exobothridial seta exp; D—bothridial seta; E—notogastral seta h 1; F—subcapitulum, left half, ventral view; G—palp; H—anterior part of chelicera; I—part of epimeral region with setae 1 a, 1 b, 2 a; J—part of epimeral region with setae 3 a, 3 b, 3 c, 4 a, 4 b, 4 c, 4 d; K—genital plate, left; L—anal and adanal plates, left. Scale bar (A, B, G) 50 Μm; scale bar (C – F, H – L) 100 Μm.

FIGURE 6. Lohmannia (Carolohmannia) monosetosa sp. nov., adult: A—leg I, without trochanter, right, antiaxial view; B—leg IV, left, antiaxial view. Scale bar 100 Μm.