Unguitarsonemus paradoxus, Khaustov & Petrov & Kolesnikov, 2021

Khaustov, Alexander A., Petrov, Alexander V. & Kolesnikov, Vasiliy B., 2021, A new genus and two new species of Tarsonemidae (Acari: Heterostigmata) associated with bark beetles (Coleoptera: Curculionidae: Scolytinae) from Peru, Zootaxa 4966 (1), pp. 41-53 : 44-45

publication ID	https://doi.org/ 10.11646/zootaxa.4966.1.4
publication LSID	lsid:zoobank.org:pub:020D9DD0-1FAF-4FEA-B210-DCC271A7733F
DOI	https://doi.org/10.5281/zenodo.4729397
persistent identifier	https://treatment.plazi.org/id/273B87CD-0A4E-9452-FF01-FF36FCDC73B6
treatment provided by	Plazi
scientific name	Unguitarsonemus paradoxus
status	sp. nov.

Treatment

Unguitarsonemus paradoxus n. sp.

( Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 )

Description

Female. Length of idiosoma 160 (180), width 95 (100).

Gnathosoma ( Fig. 2 View FIGURE 2 ). Length of gnathosomal capsule 30 (31), width 19 (21). Dorsomedian apodeme weakly developed, linear. Gnathosoma with dorsal pair of setae ch 11 (13) slightly shorter than subcapitular setae m 12 (15); both setae slender and smooth. Postpalpal setae (pp) slightly shorter than ch, slender and weakly blunttipped. Cheliceral stylets short and thin, nearly half as long as distance between bases of setae ch and distal end of gnathosomal capsule; cheliceral levers small, inconspicuous, poorly sclerotized. Palptibial claw very small, difficult to discern between accessory setigenous structures (ass).

Idiosomal dorsum ( Fig. 1A View FIGURE 1 ). All dorsal shields with uniform small round puncta. Prodorsum with very small median apodeme. Trichobothria capitate, ellipsoidal, finely spiculate and rounded apically.Anterior part of prodorsal shieldlet, lateral and posterior parts of prodorsal shield with delicate striae. Tergites C and D with finely serrate posterior margins. Posterior parts of tergites C, D, and EF with delicate longitudinal striae. All dorsal idiosomal setae smooth; setae v 1, sc 2, c 1 and c 2 pointed, other dorsal setae weakly blunt-tipped. Posterior margin of tergite H weakly concave. Lengths of dorsal setae: v 1 32 (36), sc 2 39 (44), c 1 21 (20), c 2 34 (35), d 19 (21), e 26 (31), f 39 (40), h 15 (19). Distances between setae: v 1 – v 1 21 (23), v 2 – v 2 39 (43), sc 2 – sc 2 47 (52), c 1 – c 1 50 (53), c 2 – c 2 92 (98), c 1 – c 2 28 (31), d–d 40 (42), e–e 68 (71), e–f 21 (22), f–f 26 (30), h–h 33 (36).

Idiosomal venter ( Fig. 1B View FIGURE 1 ). All ventral plates with uniform, very small puncta.All ventral setae smooth, pointed. Pits 1 b and 2 b large, elongate. Posterior margin of aggenital plate evenly rounded. Setae 1 a located just anteriad apodemes 1; setae 2 a located on apodemes 2. Tegula broadly rounded, length 14 (17), basal width 16 (18). Lengths of ventral setae: 1 a 11 (12), 2 a 14 (16), 3 a 11 (12), 3 b 15 (18), ps 14 (16).

Legs ( Figs 3 View FIGURE 3 , 4 View FIGURE 4 ). Lengths of legs: I 52 (59), II 50 (60), III 59 (63), IV 35 (39). Leg I ( Figs 3A, B View FIGURE 3 ): solenidion ω lanceolate, φ 1 and φ 2 capitate; seta k 3 (3) rod-shaped, subequal to solenidion φ 2. Lengths of solenidia: ω 6 (6), φ 1 6 (6), φ 2 3 (3). Setae l’ and l” of genu weakly barbed, other leg setae smooth; setae d, l′ of femur, l′, l”, v′, v” of genu, (p), (tc) and (u) of tarsus blunt-tipped; other leg setae pointed. Tarsal part of tibiotarsus ventrally with tubelike sclerotized subcuticular structure ( Fig. 3B View FIGURE 3 ). Leg II ( Fig. 3C View FIGURE 3 ): solenidion ω 6 (6) lanceolate. Setae d and l′ of femur weakly blunt-tipped, other leg setae pointed; all leg setae smooth. Leg III ( Fig. 4A View FIGURE 4 ): all leg setae pointed and smooth. Leg IV (Fig, 4B): all leg setae pointed and smooth. Seta tc″ very long. Lengths of setae: v’Fe 9 (10), v’Ge 15 (16), v’Ti 32 (36), tc” 100 (105).

Type material. Female holotype, slide ZISP T-Tar-001, PERU: Junín Prov., left bank of Perené River, 5 km NE from Puerto Ocopa , Canan Eden village, 1100 m, S11°04’23.9’’ W74°16’40.6’’, 10.03.2009, between coxae I and II on beetles Phloeotribus pilula ( Erichson, 1847) , A. Petrov leg. GoogleMaps Paratype: 1 female, same data GoogleMaps .

Type deposition. The holotype and one paratype are deposited in the collection of the Zoological Institute of RAS, Saint Petersburg, Russia.

Etymology. The specific epithet of the new species is derived from Latin paradoxus meaning paradoxical and refers to remarkable shape of modified seta pl” on tarsus II.