Lauroppia (Rhinoppia) undulata, Mahunka & Mahunka-Papp, 2010

Mahunka, S & Mahunka-Papp, L, 2010, New And Little Known Oribatid Mites From The Carpathian Basin And The Balkan Peninsula (Acari: Oribatida), Acta Zoologica Academiae Scientiarum Hungaricae 56 (3), pp. 211-234 : 220-222

Lauroppia (Rhinoppia) undulata sp. n.

( Figs 13–15 )

Material examined. Holotype: H-2328/b: Hungary: Szendehely, Carpinetum, 10.11.1981. Leg. S. MAHUNKA and 4 paratypes from the same sample. Holotype (1780-HO-10) and 3 paratypes (1780-PO-10) deposited in HNHM , 1 paratypes in MHNG .

Diagnosis. Body elongated, conspicuously narrow. Rostrum without apex, rostral part blunt at tip, medially widely concave. Prodorsum with weak and short costular lines and a pair of bent transversal crests basally. Rostral setae arising near to rostral margin, lamellar setae arising in median part of prodorsum. Rostral, lamellar and interlamellar setae simple, setiform, exobothridial setae longer and distinctly thicker than others. Sensillus with asymmetrically dilated head bearing 7–8 long bristles. Notogaster with undulating anterior margin. Crista present. Coxisternal region partly well sclerotised, median apodemes partly reduced. Sejugal and apodemes 4. well observable. Genitoanal setal formula: 6–1–2–3. Setae ad 3 located far anteriorly. Lyrifissures iad in adanal position.

Measurements. Length of body: 352–380 µm, width of body: 104–116 µm.

Prodorsum. Rostral part wide, without apex, slightly concave or undulate medially ( Fig. 13 ). Rostral setae situated laterally, far from each other, near to the anterior margin. A very weak, short costular line directed to insertion of lamellar setae. A pair of well sclerotised, semicircular, nearly transversal crests in interbothridial position. Bothridium with lateromarginal lath directed posteriorly. Sensillus large, its head wide, bearing unilaterally 7–8 long and thick bristles. All prodorsal setae short, length ratio: ex> ro> le ≅ in. Exobothridial setae much thicker and longer than others, setae le and in with some short bristles.

Notogaster. Conspicuously elongate, nearly twice as long as wide, anterior margin widely undulate. A pair of well-developed cristae present. Anteromedian part of notogaster projecting into the prodorsum. Ten pairs of short, nearly equally long notogastral setae, setae c 2 located very near to lyrifissures ia, only slightly shorter than other notogastral setae.

Lateral part of podosoma ( Fig. 15 ). Pedotecta I and II small. Posterior part of exobothridial region granulate. Longitudinal crests absent.

Ventral parts ( Fig. 14 ). Coxisternal region well sclerotised, but anterior and median part of sternal apodemes and epimeral borders partly or entirely reduced. Epimeral setae varying in length, setae 3c the longest of all. Six pairs of genital, 1 pair of aggenital, 2 pairs of anal, and 3 pairs of adanal setae, nearly equal in length. Setae ad 1 in postanal, setae ad 2 in paraanal and setae ad 3 in praeanal position, setae ad 3 located far from each other, near to the lateral margin of the ventral plate.

Legs: Excep the elongate femora II and IV all leg segments normal, all of oppioid type.

Remarks. The new species is well characterised by its undulate anterior margin of the notogaster, by the shape of rostrum and by the peculiarly transversal crests in the interbothridial region. On the basis of these peculiar features the new species is close to the relation of Oppiella (Rhinoppia) sensu WEIGMANN 2006 or Lauroppia sensu SUBÍAS and MINGUEZ (1986) . However, on the basis of the prodorsal transversal crests and the ventral chaetotaxy the new species is clearly distinguished from all congeners.

Etymology. The species name refers to the undulate sculpture of the prodorsum and the notogaster.

Figures

Figs 13–15. Lauroppia (Rhinoppia) undulata sp. n.: 13 = body in dorsal view, 14 = body in ventral view, 15 = podosoma in lateral view