Tycherobius australis Fan & Walter, 2006, sp. n.
Creators: name: Fan, Qing-Hai
name: Walter, David E.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Camerobiidae
Tycherobius
Tycherobius australis

description: Tycherobius australis sp. n.
(Plate 4; Figs. 9–24, 33)
Material examined
Holotype: adult female, from forest litter, 27°33'S, 153°03'E, Toohey Forest, Nathan, Brisbane, Queensland, Australia, coll. H.C. Proctor, 23 Aug 2001. In QM.
Paratypes: 2 protonymphs, 1 larva, from wet­sandy heath litter, 25°57'S, 153°00'E, Rainbow Beach, Cooloola, Queensland, Australia, coll. J. Beard, 7 Sept 1997; 1 protonymph, same data as holotype except date (8 Dec 1997); 1 larva, same data as holotype except date (21 Aug 1999); 1 adult male, same data as holotype except date (22 Mar 1999); 1 adult male, same data as holotype except date (30 Jul 1999); 1 protonymph, same data as holotype except date (28 Aug 2001); 1 adult male, same data as holotype except coll. and date (Q.­H. Fan, 4 Oct 2001); 2 protonymphs, 2 larvae, same data as holotype except coll. and date (Q.­H. Fan, 17 Dec 2001). In UQIC.
Diagnosis
Adult female. Peritremes with 1 loop; palptarsus with 2 + 1 eupathidium + 1; pdx present; idiosomal setae lanceolate subequal in length; c1: c2 = 0.8, d1: d2 = 1.4, e1: e2 = 1.3, f1: f2 = 1.3, c1: d1: e1: f1 = 1.0: 1.2: 1.4: 1.3; 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 = 1.1, d1: d2 = 1.1, e1: e2 = 1.1, f1: f2 = 1.2, c1: d1: e1: f1 = 1.2: 1.0: 1.3: 1.3; tibia I with an additional long terminal solenidion and each tarsus with an enlarged solenidion.
Description
ADULT FEMALE (Plate 4; Figs. 9–12)
Gnathosoma. Stylophore stumpy, 49; movable digits 21; peritremes with one loop. Palp 47; counts of setae and solenidia from trochanter to tarsus: 0, 2, 1, 3 + 1 claw, 2 + 1 eupathidia + 1 solenidion (). Subcapitular setae m 15, distance m–m, 23.
Idiosoma. Nearly circular in shape, 307 long, 242 wide. Prodorsum bearing one pair of eyes, 9 in diameter, one pair of postocular bodies, 11 in diameter, and five pairs of lanceolate setae, vi 50, ve 45, sci 31, sce 32, pdx 26; ratio vi: ve = 1.1; distances: vi– vi 30, vi–ve 22, vi–pdx 33, ve–sci 37, sci–sce 50. Hysterosoma bearing ten pairs of setae, c1 35, c2 45, d1 41, d2 29, e1 50, e2 39, f1 47, f2 37, h1 37, h2 26; ratios c1: c2 = 0.8, d1: d2 = 1.4, e1: e2 = 1.3, f1: f2 = 1.3, c1: d1: e1: f1 = 1.0: 1.2: 1.4: 1.3; distances: c1–c1 15, c1–c2 89, c1–d1 52, d1–d1 15, d1–d2 75, d1– e 1 52, e1– e 1 12, e1– e 2 72, e1–f1 50, f1–f1 16, f1–f2 50, f1–h1 51, h1– h1 12, h1–h2 17. Venter with three pairs of setae, 1a 18, 3a 23, 4a 18; coxal setae 1c about 1.5x of 1b, 1b 20, 1c 30. Aggenital setae small, ag 15. Genito­anal valves with one pair of genital setae, g 12, and three pairs of pseudanal setae, ps3 10, ps2 11, ps1 11.
Legs. Length (from base of trochanter to tip of tarsus): leg I 503, leg II 408, leg III 445, leg IV 542. Setae on genua lanceolate, length: I 25, II 23, III 26, IV 27. Tibiae I–IV each with a solenidion: I 18, II 6, III 5, IV 5. Tarsi I–II each with a solenidion: I 7, II 5. 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. 13–16)
Gnathosoma. Stylophore stumpy, 41; movable digits 20; peritremes with one loop. Palp 40; counts of setae and solenidia from trochanter to tarsus: 0, 2, 1, 3 + 1 claw, 2 + 1 eupathidia + 1 solenidion (). Subcapitular setae m 13, distance m–m, 23.
Idiosoma. Nearly circular in shape, 232 long, 190 wide. Prodorsum bearing one pair of eyes, 6 in diameter, one pair of postocular bodies, 11 in diameter, and five pairs of lanceolate setae, vi 35, ve 31, sci 28, sce 25, pdx 20; ratio vi: ve = 1.2; distances: vi– vi 34, vi–ve 22, vi–pdx 30, ve–sci 32, sci–sce 40. Hysterosoma bearing ten pairs of setae, c1 28, c2 25, d1 23, d2 21, e1 29, e2 28, f1 30, f2 26, h1 13, h2 17; ratios c1: c2 = 1.1, d1: d2 = 1.1, e1: e2 = 1.1, f1: f2 = 1.2, c1: d1: e1: f1 = 1.2: 1.0: 1.3: 1.3; distances: c1–c1 11, c1–c2 80, c1–d1 42, d1–d1 11, d1–d2 62, f1–f1 10, f1–f2 50, f1–h1 27, h1–h1 7, h1–h2 15. Venter with three pairs of setae, 1a 13, 3a 15, 4a 13; coxal setae 1c 1.7x of 1b, 1b 15, 1c 26. Aggenital and genital setae absent; genito­anal valves with four pairs of setae, g 10, ps3 10, ps2 10, ps1 11.
Legs. Length (from base of trochanter to tip of tarsus): leg I 485, leg II 390, leg III 425, leg IV 487. Setae on genua lanceolate, subequal, length: I 18, II 17, III 17, IV 18. Tibiae I with two solenidia, I 60, I 13; tibiae II–IV each with one solenidion: II 9, III 7,
IV 7; ratio I: I = 4.6, I: II = 6.7. Tarsi I–IV each with one solenidia: I 20, II 18,
III 13, IV 13. 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.
PROTONYMPH (Figs. 17–20)
Gnathosoma. Stylophore stumpy, 37; movable digits 18; peritremes with one loop. Palp 32; counts of setae and solenidia from trochanter to tarsus: 0, 2, 1, 3 + 1 claw, 2 + 1 eupathidia + 1 solenidion (). Subcapitular setae m 11, distance m–m, 17.
Idiosoma. Nearly circular in shape, 207 long, 161 wide. Prodorsum bearing one pair of eyes, 6 in diameter, one pair of postocular bodies, 9 in diameter, and five pairs of lanceolate setae, vi 42, ve 30, sci 27, sce 27, pdx 21; ratio vi: ve = 1.4; distances: vi– vi 32, vi–ve 22, vi–pdx 27, ve–sci 22, sci–sce 25. Hysterosoma bearing ten pairs of setae, c1 32, c2 35, d1 32, d2 25, e1 30, e2 30, f1 32, f2 25, h1 22, h2 17; ratios c1: c2 = 0.9, d1: d2 = 1.3, e1: e2 = 1.0, f1: f2 = 1.3, c1: d1: e1: f1 = 1.1: 1.1: 1.0: 1.1; distances: c1–c1 14, c1–c2 47, c1–d1 42, d1–d1 12, d1–d2 50, d1– e 1 31, e1– e 1 12, e1– e 2 47, e1–f1 32, f1–f1 10, f1–f2 32, f1–h1 35, h1– h1 7, h1–h2 5. Venter with three pairs of setae, 1a 12, 3a 14, 4a 12; coxal setae 1c about 1.8x of 1b, 1b 15, 1c 27. Aggenital setae small, ag 12. Anal valves with three pairs of pseudanal setae, ps3 7, ps2 7, ps1 7.
Legs. Length (from base of trochanter to tip of tarsus): leg I 286, leg II 234, leg III 297, leg IV 327. Setae on genua lanceolate, length: I 30, II 23, III 25, IV 27. Tibiae I–IV each with a solenidion: I 7, II 6, III 5, IV 5. Tarsi I–II each with a solenidion: I 5, II 4.
LARVA (Figs. 21–24)
Gnathosoma. Stylophore stumpy, 30; movable digits 10; peritremes with one loop. Palp 32; counts of setae and solenidia from trochanter to tarsus: 0, 2, 1, 3 + 1 claw, 2 + 1 eupathidia + 1 solenidion (). Subcapitular setae m absent.
Idiosoma. Nearly circular in shape, 187 long, 177 wide. Prodorsum bearing one pair of eyes, 6 in diameter, one pair of postocular bodies, 9 in diameter, and four pairs of lanceolate setae, vi 43, ve 25, sci 33, sce 29; ratio vi: ve = 1.7; distances: vi– vi 34, vi–ve 19, ve–sci 22, sci–sce 35. Hysterosoma bearing ten pairs of setae, c1 39, c2 37, d1 35, d2 30, e1 35, e2 28, f1 33, f2 26, h1 19, h2 10; ratios c1: c2 = 1.1, d1: d2 = 1.2, e1: e2 = 1.3, f1: f2 = 1.3, c1: d1: e1: f1 = 1.2: 1.1: 1.1: 1.0; distances: c1–c1 15, c1–c2 71, c1–d1 50, d1–d1 17, d1–d2 42, d1– e 1 20, e1– e 1 12, e1– e 2 42, e1–f1 27, f1–f1 10, f1–f2 31, f1–h1 30, h1–h1 6, h1–h2 15. Venter with two pairs of setae, 1a (15), 3a (18); coxa setae 1c 23. Anal valves with three pairs of pseudanal setae, ps3 4.5, ps2 5, ps1 5.
Legs. Length (from base of trochanter to tip of tarsus): leg I 278, leg II 245, leg III 281. Setae on genua lanceolate, length: I 25, II 20, III 22. Tibiae I–III each with a solenidion: I 6, II 5, III 4. Tarsi I–II each with a solenidion: I 4, II 2. Counts of setae and solenidia on legs I­III: coxae 1a + 1, 0, 0; trochanters 0, 0, 0; femora 2, 2, 1; genua 1 + 1, 1 + 1, 1; tibiae 3 + 1, 2 + 1, 3 + 1; tarsi 7 + 1, 5 + 1, 5.
Remarks
Adults of this species are similar to those of T. turcicus Ayy ₁ld₁z & Doğan, 2003 in the appearnnce of idiosoma and having the same chaetotaxy on the legs, but can be separated from the latter by having peritremes with one loop (vs: 3 loops), palptarsus with 1 eupathidium (vs: 2 eupathidia).
Etymology
The specific name refers to the occurrence of this species in Australia.
description: Published as part of Fan, Qing-Hai & Walter, David E., 2006, A review of the genus Tycherobius (Acari: Camerobiidae), with descriptions of four new species from Australia, pp. 1-52 in Zootaxa 1121 on pages 23-40, DOI: 10.5281/zenodo.171702