Pulchroppia roynortoni, Ermilov & Anichkin, 2011

Ermilov, S. G. & Anichkin, A. E., 2011, New Oribatid Mites Of The Genera Pulchroppia And Lineoppia (Acari: Oribatida: Oppiidae) From Cat Tien National Park In Southern Vietnam, Acarologia 51 (1), pp. 31-42 : 32-36

Pulchroppia roynortoni n. sp.

( Figures 1 – 3 )

Diagnosis

The new species is characterized by size of body, 315 – 365 x 149 – 166; smooth body surface; rostrum with two deep incisions, central protruding and two small lateral tubercles; sensillus with fivesix branches, each branch divided into two long cilia distally; ten pairs of short and smooth notogastral setae; leg setae a” and pv” on tarsi IVmodified, with radiate cilia distally.

Description

Measurements — Body length 365 (holotype), 315 – 365 (mean 336, 12 paratypes); body width 166 (holotype), 149 – 166 (mean 159, 12 paratypes). Females slightly larger than males: body length of females (holotype and four paratypes) 348 – 365 (mean 355), body width of all females (holotype and four paratypes) 166; body length of males (eight paratypes) 315 – 348 (mean 328), body width of males (eight paratypes) 149 – 166 (mean 155).

Integument — Body color light brown to brown. Surface of body smooth. Distinct polygonal sculpturing in anogenital region absent.

Prodorsum — ( Figure 1A, C ; Figure 2A–D ). Rostrum with two deep incisions, central protruding and two small lateral tubercles ( Figure 2A ). Costular lines slightly developed. Small median tubercles of interbothridial region and lateral tubercles of postbothridial region directed towards dorsosejugal scissure, rounded posteriorly. Rostral (ro, 24 – 28), lamellar (le, 12), interlamellar (in, 12 – 20) and exobothridial (ex, 8) setae setiform, thin, smooth. Sensilli (ss, 53 – 61) with five-six branches, each branch divided into two long cilia distally.

Notogaster and lateral part of body — ( Figure 1A, C ). Ten pairs of notogastral setae. Setae c very short (2 – 4), others setae longer (12 – 16), straight, thin, smooth. Lyrifissures (ia, im, ip, ih, ips) welldeveloped, long. Opisthosomal gland opening indistinct. Discidia (di) strongly, triangular.

Anogenital region — ( Figure 1B ; Figure 2E, F ). Two pairs anal (an 1, an 2, 8 – 12), three pairs adanal (ad 1 - ad 3, 12), one pair aggenital (ag, 6 – 8) and five

Acarologia 51(1): 31–42 (2011)

pairs genital (g 1 - g 5 6 – 8) setae, thin, smooth. Lyrifissures iad well-developed, in typical position for genus. Anterior part of genital plates with short, triangular projections and with rectangular concavity between them. Ovipositor ( Figure 2G ) elongate, narrow (89 – 93 x 16); length of lobes 24 – 28, length of cylindrical distal part (bDp) 65. Lobes with 12 pairs thin, smooth setae; ψ 1 ≈ τ 1 (20 – 24) longer than ψ 2 ≈ τa ≈ τb ≈ τc (16). Setae k absent.

Epimeral region — ( Figure 1B ). Setae 3c and 4c 24, setiform, curved, barbed. Others setae shorter (12 – 16), straight, smooth. Setae 3a set adjacent to small tubercles. Setae 3c set on small apophyses laterally.

Gnathosoma — ( Figure 2H–J ). Subcapitulum longer than wide: 86 – 102 x 61 – 69. Hypostomal setae setiform, smooth; a and h (14 – 16) shorter than m (24). Lateral lips wide and rectangular distally, adoral setae absent. Palps (length 53 – 57) with setation 0-2-1-3-8(+1ω). All setae (except on tarsi) with long cilia (on femora and genua) or barbs (on tibiae). Palptarsal solenidion very long, thickened, lying adjacent to acm distally. Chelicerae (length 82 – 94) chelate-dentate, with small thorn on dorsal side. Cheliceral setae setiform, barbed, cha (20) slightly longer than chb (16).

Legs — ( Figure 3 ). All legs with one simple claw. Formulae of leg setation and solenidia: I (1-5-2-4- 20) [1-2-2], II (1-5-2-4-15) [1-1-2], III (2-3-1-3-13) [1- 1-0], IV (1-2-2-3-10) [0-1-0]; homology of setae and solenidia indicated in Table 1 . Setae (except p and famulus) with cilia or barbs. Setae a” and pv” on tarsi IV modified in all specimens, with radiate cilia distally. Setae p on tarsi II – IV absent. Famulus short, dilated distally. Solenidia ω 1 and ω 2 on tarsi I, ω 1 and ω 2 on tarsi II, φ 1 on tibiae II, φ on tibiae IV, σ on genua III thickened, rod-like. Others solenidia setiform, straight, with thinner tips, blunt-ended.

Material examined — Holotype (female) and 12 paratypes (eight males and four females) were obtained from southern Vietnam, 11°25’ N, 107°25’ E, 149 m a.s.l., in dark loamy soil of Lagerstroemia forest, February-March 2009, collected by A.E. Anichkin.

Type deposition — The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia ; 11 paratypes are deposited in the collection of Siberian Zoological Museum , Novosibirsk, Russia ; one paratype are in the personal collection of the first author.

Etymology — The specific name is dedicated to our colleague, the acarologist Roy A. Norton, Syracuse N.Y., USA.

Distribution — At present, this species is only known from Cat Tien National Park of southern Vietnam.

Remarks — Pulchroppia roynortoni n. sp. clearly differs from all the species of Pulchroppia ( P. burckhardti Mahunka, 1987 from Borneo, P. elegans Hammer, 1979 from Java, P. granulata Mahunka, 1988 from Oriental region, P. malapectinata (Corpuz- Raros, 1979) from Philippines, P. pendula ( Balogh, 1970) from Sri Lanka, P. ramifera Wang and Li, 1997 from China — see Wang, Li and Zheng 1997 —, P. sculpturata Mahunka, 2008 from Thailand) by the specific structure of rostrum (with two deep incisions, central protruding and two small lateral tubercles in new species; rounded in the other species) and the morphology of sensillus (each branch divided into two long cilia distally in new species; not divided or only partially divided in the other species).

Figures

FIGURE 1: Pulchroppia roynortoni n. sp. A – dorsal view, legs partly removed; B – ventral view, legs removed; C – lateral view, legs partly removed, gnathosoma and epimeral setae removed. Scale bars (A + B, C) 100 µm.

FIGURE 2: Pulchroppia roynortoni n. sp. A – rostrum and rostral setae; B – lamellar seta; C – interlamellar seta; D – sensillus; E – genital plate, right; F – anal plate, right; G – ovipositor; H – subcapitulum; I – palp; J – chelicera. Scale bars (A, D – J) 20 µm, scale bar (B + C) 10 µm.

FIGURE 3: Pulchroppia roynortoni n. sp. A – leg I, without trochanter, left, paraxial view; B – leg II, without trochanter, left, paraxial view; C – leg III, right, paraxial view; D – leg IV, right, paraxial view. Scale bar (A + B + C + D) 50 µm.