Perscheloribates paratzitzikamaensis, 2013

Ermilov, S. G., Sandmann, D., Marian, F. & Maraun, M., 2013, Perscheloribates Paratzitzikamaensis N. Sp., With Supplementary Descriptions Of Scheloribates Elegans And Monoschelobates Parvus (Acari, Oribatida, Scheloribatidae) From Ecuador, Acarologia 53 (4), pp. 429-437 : 430-432

Perscheloribates paratzitzikamaensis n. sp.

( Figure 1 )

Diagnosis — Body size: 298 – 315 × 182 – 199. Rostrum rounded. Prodorsal setae long, setiform, barbed. Sensilli spindle-form, with short cilia. Translamellar line absent. Prolamellar lines represented by short basal part. Notogaster with nine pairs of setal alveoli and one piar (p 1) of setae. Epimeral setal formula: 3-1-2-2. Leg claw serrate on dorsal side.

Description — Measurements. Body length: 315 (holotype), 298 – 315 (four paratypes); notogaster width: 199 (holotype), 182 – 199 (four paratypes).

Integument — Body color light brown. Body surface smooth.

Prodorsum — Rostrum rounded. Lamellae located dorso-laterally, as long as half of prodorsum (in lateral view), without cusps. Translamellar line absent. Prolamellar lines represented only by short basal part. Sublamellar lines distinct, long. Sublamellar porose areas (Al) small, oval (6×4). Rostral (ro, 41 – 49), lamellar (le, 53 – 61) and interlamellar (in, 65 – 73) setae setiform, barbed. Sensilli (ss, 61 – 65) spindle-form (with well dilated head and long, thin apex), with short cilia. Exobothridial setae and their alveoli absent. A pair of elongate, narrow porose areas present (visible in dissected specimens) latero-posterior to interlamellar setae.

Notogaster — Anterior notogastral margin convex medially. Dorsophragmata (D) of medium size, widely rounded. Nine pairs of notogastral setae represented by alveoli; one pair of thin, smooth setae present (p 1, 24-32). Four pairs of sacculi (Sa, S1, S2, S3) oval, with small openings.

Epimeral and lateral podosomal regions — Apodemes 1, 2, 3 and sejugal apodemes distinct. Epimeral setal formula: 3-1-2-2 (3c, 4c absent). Setae setiform, thin, smooth; medial setae 1a, 2a, 3a (6

– 12) shorter than others (16 – 24). Pedotecta I (Pd I) large, concave, pedotecta II (Pd II) rounded anteriorly. Discidia (dis) poorly developed, rounded distally. Circumpedal carinae (cp) distinct.

Anogenital region — Four pairs of genital (g 1, 12 – 20, g 2 - g 4, 6 – 12), one pair of aggenital (ag, 6 – 12), two pairs of anal (an 1, an 2, 6 – 12) and three pairs of adanal (ad 1 - ad 3, 6 – 12) setae thin, smooth. Lyrifissures iad in paraanal position.

Legs — Claw of each leg with several minute barbs on dorsally side. Formulae of leg setation and solenidia: I (1-5-3-4-19) [1-2-2], II (1-5-2-4-15) [1-1-2], III (2-3-1-3-15) [1-1-0], IV (1-2-2-3-12) [0-1-0]; homology of setae and solenidia indicated in Table 1 .

Material examined — Holotype (female): Ec- 2 (1.IV.2009, collected by F. Marian and D. Sandmann). Four paratypes (all females): Ec-3 (1.IV.2009, collected by F. Marian and D. Sandmann).

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

Etymology — The prefix para is Latin meaning "near" and refers to the similarity between the new species and the species Perscheloribates tzitzikamaensis ( Pletzen, 1965) .

Remarks — In having the long notogastral setae p 1 (other setae represented by alveoli) and spindleform sensilli, Perscheloribates paratzitzikamaensis n. sp. is similar to Perscheloribates tzitzikamaensis (Plet- zen, 1965) from South Africa (see Pletzen 1965), however, it differs from the latter by smaller body size (298 – 315 × 182 – 199 versus 405 – 423 × 279 – 293 in P. tzitzikamaensis ), longer setae p 1 (considerably longer than adanal setae versus not longer in P. tzitzikamaensis ), the absence of a translamellar line (rudimentary parts of lines present in P. tzitzikamaensis ) and prolamellar lines represented only by short basal part (versus present in P. tzitzikamaensis ).

Also, in having the long notogastral setae p 1 (other setae represented by alveoli), Perscheloribates paratzitzikamaensis n. sp. is similar to Perscheloribates aculeatus ( Hammer, 1961) from Peru (see Hammer 1961), however, it differs from the latter by the spindle-form sensilli (versus fusiform in P. aculeatus ) and the rounded rostrum (versus pointed in P. aculeatus ).

Figures

FIGURE 1: Perscheloribates paratzitzikamaensis n. sp.: A – body dorsally; B – body ventrally (gnathosoma and legs not illustrated); C – prodorsum and anterior part of notogaster laterally (gnathosoma and legs not illustrated); D – rostral seta; E – sensillus; F – pedotectum II and discidium in dissected specimen; G – left genital plate and epimaral seta 3a; H – left anal plate and adanal seta ad3; I – claw on leg I. Scale bars (A-C) 100 µm, scale bar (D-F, I) 10 µm, scale bar (G, H) 20 µm.