Pulchroppia richterae, ErmilovK & SandmannK & ScheuK, 2023

ErmilovK, Sergey G., SandmannK, Dorothee & ScheuK, Stefan, 2023, New species of Pulchroppia (Acari, Oribatida, Oppiidae) from Indonesia, Acarologia 63 (3), pp. 725-734 : 726-729

Pulchroppia richterae n. sp.

Zoobank: 963F9CBF-5474-4F0E-B297-2A85A3FB7656

( Figures 1 , 2 )

Additional pictures are available in the online repositoryhttp://www.ecotaxonomy.org: ECOTAX_ID: 405475

25 μm (A, C), 20 μm (B), 50 μm (D–G).

Type material — Holotype (female) and four paratypes (three males and one female): Indonesia, Sumatra, Harapan landscape, secondary rainforest, 02°11′15.2″S, 103°20′33.4″E, litter. Specimens were collected by Bernhard Klarner (November 2013) and identified to morphospecies level by Dorothee Sandmann.

The holotype is deposited in the collection of the BRIN (National Research and Innovation Agency), Cibinong, Indonesia ; four paratypes are in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia. All specimens are preserved in 70% solution of ethanol with a drop of glycerol.

Diagnosis — Body length: 540–555. Interbothridial region tuberculate; notogaster and anogenital region smooth. Rostrum rounded. Rostral and lamellar setae medium-sized, setiform, slightly barbed; interlamellar seta comparatively long, setiform, erect, nearly smooth; exobothridial seta similar to lamellar seta in length; bothridial seta with three branches. Notogastral seta c represented by microseta, other setae medium-sized, setiform, erect, nearly smooth. Ventrosejugal tubercles absent. Discidium not defined. Adanal setae setiform, slightly roughened. Adanal lyrifissure slightly inverse oblique. Leg trochanter IV with anterodorsal tooth.

Description — Measurements – Body length: 555 (holotype: female), 540–555 (three male paratypes); 540 (one female paratype); body width: 315 (holotype), 315 (three male paratypes); 330 (one female paratype). No distinct difference between males and females in body size.

Integument – Body color light brown to brown. Body surface mostly smooth but interbothridial region with some large tubercles (diameter up to 13) and lateral part of body between bothridium and acetabula I–III densely microtuberculate (diameter of tubercle up to 4).

Prodorsum – Rostrum rounded. Costulae and transcostula present but poorly visible. Rostral (26–34) and lamellar (26–34) setae setiform, slightly barbed; interlamellar seta (82–90) setiform, erect, nearly smooth; exobothridial seta (26–34) setiform, erect, slightly barbed, located on tubercle; bothridial seta (112–127) with three branches; of them, distal branch the shortest, proximal branch the longest. Interbothridial region without muscle sigillae. Postbothridial tubercle absent.

Notogaster – Anterior border convex medially. Notogastral seta c (1–2) represented by microseta, others (p 1: 41–45; la, lm, lp, h 1 – h 3, p 2, p 3: 56–71) setiform, erect, nearly smooth;

lm and lp distinctly not reaching the insertions of lp and h 2, respectively. All notogastral lyrifissures and opisthonotal gland opening distinct.

Gnathosoma – Subcapitulum size: 131–135 × 82–90; subcapitular setae (a: 20–22; m, h: 34–37) setiform, slightly barbed; both adoral setae (13–15) dilated and truncate distally, smooth. Palp length: 82–86; postpalpal seta (4) spiniform, smooth. Chelicera length: 120–124; setae (cha: 28–30; chb: 20–22) setiform, barbed.

Epimeral and lateral podosomal regions – Epimeral setae 3c (41–52), 4c (34–37) setiform, slightly barbed, others 1b (, 3b, 4a: 22–26; 1a, 1c, 2a, 3a, 4b: 15–19) setiform, nearly smooth. Ventrosejugal tubercles absent. Discidium not defined.

Anogenital region – Genital (15–19), aggenital (15–19), adanal (ad 1: 41–45; ad 2: 22–26;

ad 3: 15–19), and anal (22–26) setae setiform slightly roughened. Adanal lyrifissure slightly inverse oblique, close to anal aperture.

Legs – Claw of each leg slightly barbed on dorsal side. Trochanter IV with anterodorsal tooth. Porose area on femora I–IV and on trochanters III, IV slightly visible. Formulas of leg setation and solenidia: I (1–5–2–4–20) [1–2–2], II (1–5–2–4–16) [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. Setae

p′ and p″ setiform on tarsus I versus very short, conical on tarsi II–IV; seta s eupathidial on tarsus I; famulus short, erect, slightly swollen distally, located close and behind solenidion 1. ω Solenidia ω 1, ω 2 on tarsi I, II, φ on tibia II, σ on genua II, III medium-sized, slightly bacilliform or rod-like versus other solenidia long, setiform.

Remarks — Pulchroppia richterae n. sp. is morphologically similar to P. elegans Hammer,

1979 in having setiform, nearly smooth notogastral setae and simple branches on the bothridial seta, but differs from the latter by the larger body length (540–555 versus 460), the number of branches on the bothridial seta (three versus seven or eight), the length of dorsal notogastral setae (medium-sized versus long), by tuberculate (versus not tuberculate) interbothridial region, and the relative length of lamellar and exobothridial setae ex (not shorter than le versus shorter).

Etymology — The species name is dedicated to MSc Kristina Richter for her contributions to studies on the diversity and ecology of oribatid mites of Ecuador and Indonesia. She contributed to the morphospecies collection of oribatid mites of Jambi province, Sumatra Indonesia and in digitally recording this collection.

Figures

Figure 1 Pulchroppia richteraen. sp., adult: A – dorsal view (legs omitted); B – ventral view (gnathosoma and legs omitted); C – lateral view (gnathosoma and legs omitted). Scale bar 100 μm.

Figure 2 Pulchroppia richterae n. sp., adult: A – subcapitulum, ventral view; B – palp, right, antiaxial view; C – chelicera, right, antiaxial view; D – leg I, right, antiaxial view; E – leg II right, antiaxial view; F – leg III, left, antiaxial view; G – leg IV, left, antiaxial view. Scale bar