Tycherobius stipula, Fan, Qing-Hai & Walter, David E., 2006

Fan, Qing-Hai & Walter, David E., 2006, A review of the genus Tycherobius (Acari: Camerobiidae), with descriptions of four new species from Australia, Zootaxa 1121, pp. 1-52 : 14-23

publication ID	https://doi.org/ 10.5281/zenodo.171702
DOI	https://doi.org/10.5281/zenodo.5625449
persistent identifier	https://treatment.plazi.org/id/03A04634-FFDC-FF9B-FEF5-FA9CFD7C806D
treatment provided by	Plazi
scientific name	Tycherobius stipula
status	sp. nov.

Treatment

Tycherobius stipula sp. n.

(Plate 1–4; Figs. 1–8 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 , 33 View FIGURE 33 )

Material examined

Holotype: adult female, from grasstree litter, 27°33'S, 153°03'E, Toohey Forest, Nathan, Brisbane, Queensland, Australia, coll. H.C. Proctor, 5 Sept 1999. In QM.

Paratypes: 1 adult male, same data as holotype except coll. (D.E. Walter), 6 Aug 1997; 1 adult female, from wetsandy heath litter, 25°57'S, 153°00'E, Rainbow Beach, Cooloola, Queensland, Australia, coll. J. Beard, 7 Sept 1997; 1 adult female, 2 adult male, same data as holotype except date (21.viii.1999). In UQIC.

Diagnosis

Adult female. Peritremes with 2 loops; palptarsus with 2 + 1 eupathidium + 1; pdx present; idiosomal setae broadly clavate and subequal in length; c1: c2 = 0.9, d1: d2 = 1.4, e1: e2 = 1.2, f1: f2 = 1.0, c1: d1: e1: f1 = 1.0: 1.1: 1.2: 1.2; femora I–IV with 4, 3, 3, 2; tarsi I–II with 10 + 1, 8 + 1.

Adult male. As adult female but: h1 much shorter than other setae; c1: c2 = 0.7, d1: d2 = 1.1, e1: e2 = 0.9, c1: d1: e1: f1 = 1.2: 1.3: 1.1: 1.0; tibia I with an additional long terminal solenidion and each tarsus with an enlarged and slightly elongate solenidion.

Description

ADULT FEMALE (Plate 1–4; Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 )

Gnathosoma . Stylophore stumpy, 55; movable digits 27; peritremes with 2 loops. Palp 45; counts of setae and solenidia from trochanter to tarsus: 0, 2, 1, 3 + 1 claw, 2 + 1 eupathidia + 1 solenidion (). Subcapitular setae m 20, distance m–m, 28.

Idiosoma. Nearly circular in shape, 301 long, 227 wide. Prodorsum bearing one pair of eyes, 10 in diameter, one pair of postocular bodies, 14 in diameter, and five pairs of distally expanded setae, vi 40, ve 28, sci 28, sce 27, pdx 22; ratio vi: ve = 1.4; distances: vi– vi 32, vi–ve 27, vi–pdx 37, ve–sci 32, sci–sce 47. Hysterosoma bearing ten pairs of setae, c1 26, c2 29, d1 29, d2 21, e1 31, e2 26, f1 31, f2 30, h1 27, h2 16; ratios c1: c2 = 0.9, d1: d2 = 1.4, e1: e2 = 1.2, f1: f2 = 1.0, c1: d1: e1: f1 = 1.0: 1.1: 1.2: 1.2; distances: c1–c1 17, c1–c2 97, c1–d1 62, d1–d1 21, d1–d2 67, d1– e 1 44, e1– e 1 15, e1– e 2 65, e1–f1 50, f1–f1 15, f1–f2 50, f1–h1 47, h1–h1 17, h1–h2 20. Venter with three pairs of setae, 1a 20, 3a 25, 4a 18; coxal setae 1c about 1.5x of 1b, 1b 18, 1c 27. Aggenital setae small, ag 12. Genitoanal valves with one pair of genital setae, g 12, and three pairs of pseudanal setae, ps3 10, ps2 10, ps1 11.

Legs. Length (from base of trochanter to tip of tarsus): leg I 491, leg II 392, leg III 457, leg IV 515. Setae on genua clavate, length: I 26, II 23, III 22, IV 27. Tibiae I–IV each with a solenidion: I 9, II 6, III 5, IV 5. Tarsi I–II each with a solenidion: I 6, II 4. Counts of setae and solenidia on legs I–IV: coxae 1a + 2, 1, 2, 2; trochanters 1, 1, 1, 1; femora 4, 3, 3, 2; genua 1 + 1, 1 + 1, 1, 1; tibiae 9 + 1, 8 + 1, 7 + 1, 7 + 1; tarsi 10 + 1, 8 + 1, 7, 7.

ADULT MALE (Plate 4; Figs. 5–8 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 )

Gnathosoma . Stylophore stumpy, 52; movable digits 23; peritremes with 2 loops. Palp 45; counts of setae and solenidia from trochanter to tarsus: 0, 2, 1, 3 + 1 claw, 2 + 1 eupathidia + 1 solenidion (). Subcapitular setae, m 18, distance m–m, 20.

Idiosoma. Nearly circular in shape, 255 long, 206 wide. Prodorsum bearing one pair of eyes, 9 in diameter, one pair of postocular bodies, 13 in diameter, and five pairs of clavate setae, vi 30, ve 25, sci 23, sce 15, pdx 16; ratio vi: ve = 1.2; distances: vi– vi 31, vi–ve 25, vi– pdx 27, ve–sci 35, sci–sce 37. Hysterosoma bearing ten pairs of setae, c1 19, c2 28, d1 20, d2 18, e1 18, e2 19, f1 16, f2 20, h1 14, h2 18; ratios c1: c2 = 0.7, d1: d2 = 1.1, e1: e2 = 0.9, f1: f2 = 0.8, c1: d1: e1: f1 = 1.2: 1.3: 1.1: 1.0; distances: c1–c1 12, c1–c2 87, c1–d1 57, d1–d1 14, d1–d2 62, d1– e 1 35, e1– e 1 13, e1– e 2 62, e1–f1 34, f1–f1 13, f1–f2 42, f1–h1 17, h1–h1 10, h1– h2 37. Venter with three pairs of setae, 1a 15, 3a 20, 4a 15; coxal setae 1c 1.3x of 1b, 1b 15, 1c 20. Aggenital and genital setae absent; genitoanal valves with four pairs of setae, g 10, ps3 10, ps2 11, ps1 13.

Legs. Length (from base of trochanter to tip of tarsus): leg I 503, leg II 405, leg III 447, leg IV 505. Setae on genua clavate, subequal, length: I 25, II 22, III 22, IV 25. Tibiae I with two solenidia, I 2 55, I 1 8; tibiae II–IV each with one solenidion: II 6, III 5, IV 5; ratio I 2: I 1 = 6.9, I 2: II = 9.2. Tarsi I–IV each with one enlarged solenidia: I 21, II 20, III 15, IV 15. Counts of setae and solenidia on legs I–IV: coxae 1a + 2, 1, 2, 2; trochanters 1, 1, 1, 1; femora 4, 3, 3, 2; genua 1 + 1, 1 + 1, 1, 1; tibiae 9 + 2, 8 + 1, 7 + 1, 7 + 1; tarsi 10 + 1, 8 + 1, 7 + 1, 7 + 1.

Remarks

Adult females of this species are very similar to that of T. aotearoa Fan & Zhang, 2005 in having similar structure of peritremes, chaetotaxy of palptarsus and legs, but differ from the latter in the idiosomal setae being broadly clavate and subeuqal in length; c1: c2 = 0.9, d1: d2 = 1.4, e1: e2 = 1.2, f1: f2 = 1.0, c1: d1: e1: f1 = 1.0: 1.1: 1.2: 1.2 (vs: d1 and e1 obviously longer than others).

PLATE 4. Tarsi I (left side, female; right side male). A, B, Tycherobius stipula sp. n.; C, D, T. australis sp. n.; E, T. acicula sp. n.; F, T. elongata sp. n.