Maculanemus chilensis, Khaustov & Tolstikov, 2025

Khaustov, Alexander A. & Tolstikov, Andrei V., 2025, A new genus and two new species of Tarsonemidae (Acari: Heterostigmata) from Chilean Patagonia, Persian Journal of Acarology 14, pp. 317-334 : 319-324

publication ID	https://doi.org/10.22073/pja.v14i2.86917
publication LSID	urn:lsid:zoobank.org:pub:3F8689D1-900E-48BD-8687-F60DB5BA0111
persistent identifier	https://treatment.plazi.org/id/03DF87FC-FF95-FFB5-FE42-F9799CAAE17F
treatment provided by	Felipe
scientific name	Maculanemus chilensis
status	sp. nov.

Treatment

Maculanemus chilensis sp. nov. ( Figs. 1–6 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 )

http://zoobank.org/ urn:lsid:zoobank.org:act:190522A7-219E-4DFF-830A-A7854E5048C6

Description (female)

Length of idiosoma 242 (208–254), width 167 (155–177).

Idiosomal dorsum ( Figs. 1A View Figure 1 , 4A View Figure 4 , 5A, C, E View Figure 5 ) – Idiosoma elongated oval in outline. All dorsal shields with uniform small round puncta ( Figs. 5A, C, E View Figure 5 ). Posterior parts of prodorsal shield and tergites C, D, and EF with delicate striae. Prodorsal shield and tergite C weakly concave posteriorly.

Setae sc2, c1 and c2 smooth and pointed, in some specimens setae c1 weakly blunt-tipped; other dorsal setae blunt-tipped and weakly barbed. Lengths of dorsal setae: v1 29 (28–32), sc2 85 (80–87), c1 13 (13–17), c2 23 (21–23), d 14 (13–14), e 10 (10–11), f 13 (13–14), h 11 (10–12). Distances between setae: v1–v1 25 (23–25), v2–v2 35 (34–40), sc2–sc2 36 (36–41), c1–c1 69 (69–72), c2– c2 104 (104–109), c1–c2 30 (26–30), d–d 59 (58–66), e–e 75 (73–78), e–f 21 (19–22), f–f 35 (32– 40), h–h 32 (32–35).

Idiosomal venter ( Figs. 1B View Figure 1 , 4B View Figure 4 , 5B, D, F View Figure 5 ) – Ventral plates with very small and hardly visible puncta ( Figs. 5B, D, F View Figure 5 ). Setae ps weakly barbed, other ventral setae smooth; all ventral setae weakly blunt-tipped. Pits 1b and 2b small, round. Setae 1a located well posteriad apodemes 1; setae 2a located just posteriad middle part of apodemes 2, in one specimen left seta 2a asymmetrically absent ( Fig. 5B View Figure 5 ). Tegula length 10 (10–11), maximum width 17 (17–19). Lengths of ventral setae: 1a 5 (4– 5), 2a 5 (5–6), 3a 16 (13–16), 3b 8 (8), ps 16 (16–17).

Gnathosoma ( Figs. 5B View Figure 5 , 6 View Figure 6 ) – Length of gnathosomal capsule 35 (35–37), width 37 (37–38). Dorsomedian apodeme not evident. Gnathosoma with dorsal pair of setae ch 18 (17–18) distinctly longer than subcapitular setae m 8 (7–8); both setae smooth; setae m weakly blunt-tipped, ch pointed. Dorsal face of gnathosomal capsule and ventral pigmented spots with tiny puncta.

Legs ( Figs. 2 View Figure 2 , 3 View Figure 3 ) – Lengths of legs: I 54 (49–55), II 52 (51–54), III 52 (51–53), IV 46 (45–47). Leg I ( Fig. 2A View Figure 2 ). Solenidion ω slightly clavate, φ1 slightly capitate; seta k 7 (6–7) rod-shaped. Lengths of solenidia: ω 4 (5), φ1 3 (3–4). Setae (tc) and (p) of tibiotarsus smooth, blunt-tipped, eupathid-like, subequal in length; setae d, l’ of femur and l’ of genu blunt-tipped, other leg setae pointed; all leg setae smooth. Seta d of tibiotarsus distinctly longer than other leg setae. One specimen lacks both tibial solenidia φ1 and φ2 on both legs. Leg II ( Fig. 2B View Figure 2 ). Solenidion ω 6 (5–6) weakly clavate. All setae smooth; seta pl” of tarsus spiniform and located posterolaterad solenidion ω; Setae d and l’ of femur weakly blunt-tipped, other leg setae pointed. Leg III ( Fig. 3A View Figure 3 ). All setae smooth; setae v’ of femur weakly blunt-tipped, other leg setae pointed. Leg IV ( Fig. 3B View Figure 3 ). Setae v’Ti weakly barbed, other leg setae smooth; seta tc” pointed, other leg setae blunt-tipped; seta tc” of tibiotarsus long, whip-like. Type material

Holotype: female, slide ZISP T-Tar-004, Chile, The Region of Magallanes, Nothofagus forest, moss on soil, 53° 41' 08.8" S, 70° 58' 24.2" W, 26 January 2015, coll. A. V. Tolstikov GoogleMaps . Paratypes: 22 females, same data GoogleMaps .

Type deposition

The holotype and nine paratype are deposited in the collection of the Zoological Institute of RAS, Saint Petersburg, Russia ; other paratypes are deposited in the mite collection of the Museum of Zoology , University of Tyumen, Tyumen, Russia .

Etymology The specific epithet of the new species refers to geographical distribution in Chile.