Kokoppia lagunaensis, Ermilov, 2019

Ermilov, Sergey G., 2019, New species of oribatid mites of the family Oppiidae (Acari, Oribatida) from Chile, Zootaxa 4656 (2), pp. 274-286 : 275-279

Kokoppia lagunaensis sp. nov.

( Figs 1–3 )

Material examined. Holotype (male) and four paratypes (all males): Chile, Región de Magallanes y de la Antártica Chilena, Provincia de Magallanes, 30 km south-east of Punta Arenas, before Laguna Parrillar National Park , 53°23’00”S, 071°13’34”W, swamp, moss Sphagnum magellanicum, Berlese funnel extraction, 10.XI.2014 (V.A. Stolbov & S.A. Ivanov) .

Type deposition. The holotype is deposited in the collection of the Senckenberg Institute, Görlitz, Germany; four paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia. All in ethanol with drop of glycerol.

Diagnosis. Body size: 209–225 × 110–123. Rostrum rounded. Costulae of medium size, distally not reaching level of lamellar setae. Transcostula absent. Rostral, lamellar and interlamellar setae setiform, barbed; ro longer than le and in. Bothridial setae long, unilaterally slightly dilated and ciliate (with four long cilia). Interbothridial region with two pairs of muscle sigillae and one pair of tubercles. Nine pairs of comparatively short, setiform, barbed notogastral setae and one pair (c) of minute, needle-like notogastral setae. Setae la inserted posterolateral to lm. Epimeral and anogenital setae short, setiform, slightly barbed. Leg tarsi II with one solenidion.

Description. Measurements. Body length: 209 (holotype, male), 209–225 (four paratypes, all males); notogaster width: 114 (holotype), 110–123 (four paratypes).

Integument. Body color light brownish. Body surface microfoveolate (visible only under high magnification in dissected specimens, × 1000). Lateral parts of body between bothridia and acetabula I and II with few small granules (their diameter up to 2).

Prodorsum ( Figs 1 A, 1 C ). Rostrum rounded. Costulae of medium size, lineate, distally not reaching level of lamellar setae. Transcostula absent. Rostral (20), lamellar (12) and interlamellar (12) setae setiform, barbed; le located closer to in than to ro. Exobothridial setae (8) setiform, thin, slightly barbed. Bothridial setae (45–49) with long stalk and shorter, elongate, unilaterally slightly dilated and ciliate (with four long cilia) head. Interbothridial region with two pairs of muscle sigillae and one pair of tubercles (posterior to interlamellar setae). Postbothridial tubercles distinctly developed. Longitudinal rows, comprising several muscle sigillae, present in front of the bothridia. Lateral semi-oval prodorsal carinae lc present.

Notogaster ( Figs 1 A, 1 C, 1 D ). Anterior border convex medially. Ten pairs of notogastral setae present, c (2–4) needle-like, smooth, others (16) setiform, barbed, la inserted slightly posterolateral to lm. Notogastral lyrifissures ia, im and ip and opisthonotal gland openings well visible, ih and ips not observed. Circumgastric scissure and circumgastric sigillar band distinct.

Gnathosoma ( Figs 1 C , 2 A–2 C). Subcapitulum longer than wide (53–57 × 41). Subcapitular setae setiform, slightly barbed, m (14) longer than a and h (10). Adoral setae (4) setiform, thin, smooth. Palps (36–41) with setation 0-2-1-3-9(+1 solenidion). Postpalpal setae (2) spiniform, smooth. Chelicerae (53–57) with two setiform, barbed setae, cha (12–14) longer than chb (8). Trägårdh’s organ of chelicerae elongate triangular.

Epimeral and lateral podosomal regions ( Figs 1 B, 1 C ). Sejugal tubercles absent. Epimeral borders IV present, semi-oval. Epimeral setal formula 3-1-3-3, setae setiform, slightly barbed, 3c (16) longer than 1b, 1c, 3b, 4a, 4b and 4c (10–12) and 1a, 2a and 3a (8). Lateral ridges between bothridia and acetabula III on lateral sides of body absent. Discidia triangular.

Anogenital region ( Figs 1 B–1 D). Six pairs of genital (6), one pair of aggenital (10–12), three pairs of adanal (10–12) and two pairs of anal (10–12) setae setiform, slightly barbed. With three pairs of genital papillae. Adanal lyrifissures distinct, in inverse apoanal position, distanced from anal aperture.

Legs ( Figs 3 A–3 D). Leg claws smooth. Porose areas on femora I–IV not observed. Formulas of leg setation and solenidia: I (1-5-2-4-20) [1-2-2], II (1-5-2-4-16) [1-1-1], 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 . Setae p setiform on tarsi I, and very short, conical on tarsi II–IV. Famulus of tarsi I erect, slightly swollen and blunted distally, inserted posterolateral to solenidion ω 1. Solenidia ω 1 on tarsi I, ω on tarsi II, φ on tibiae II, III and σ on genua III bacilliform, ω 2 on tarsi I slightly thickened, blunt-ended, other solenidia setiform.

Etymology. The specific name lagunaensis refers to the Laguna Parrillar National Park, near of which was collected the new species.

Remarks. Kokoppia lagunaensis sp. nov. is morphologically most similar to Kokoppia inclinata (Hammer, 1962) comb. nov. 1 from the Neotropical region ( Hammer 1962 b), K. rafalskii ( Hammer, 1968) from New Zealand and K. pectinata ( Kok, 1967) from South Africa and India ( Kok 1967) in having costulae, comparatively short lamellar, interlamellar and notogastral setae, localization of notogastral setae la posterolateral to lm, and unilaterally dilated and ciliate bothridial setae. The new species differs from K. inclinata by the smaller body length (209–225 versus 280), the presence of short costulae (their distal part not developed) and the absence of transcostula (versus costulae completely and transcostula well developed), and the presence of interbothridial tubercles (versus tubercles absent) and long bothridial cilia distinctly longer than bothridial heads (versus cilia shorter than bothridial heads); from K. rafalskii by the smaller body length (209–225 versus 280), and the presence of short costulae (their distal part not developed) (versus costulae completely well developed), interbothridial tubercles (versus tubercles absent) and long bothridial cilia distinctly longer than bothridial heads (versus cilia shorter than bothridial heads); from K. pectinata by the smaller body length (209–225 versus 308–336), the presence of short costulae (their distal part not developed) (versus costulae completely well developed), interbothridial tubercles (versus tubercles absent) and one solenidion on leg tarsi II (versus two solenidia).

Figures

FIGURE 1. Kokoppia lagunaensis sp. nov., adult:A—dorsal view (legs not shown); B—ventral view (gnathosoma and legs not shown); C—anterior part of body, lateral view (legs not shown); D—posterior part of body, lateral view. Scale bar 50 μm.

FIGURE 2. Kokoppia lagunaensis sp. nov., adult: A—subcapitulum, ventral view; B—palp, right, antiaxial view; C—chelicera, left, paraxial view. Scale bar 20 μm (A, C), 10 μm (B).

FIGURE 3. Kokoppia lagunaensis sp. nov., adult: A—leg I, right, antiaxial view; B—genu, femur and trochanter of leg II, left, antiaxial view; C—genu, femur and trochanter of leg III, right, antiaxial view; D—leg IV, left, antiaxial view. Scale bar 20 μm.