Atractides (Tympanomegapus) sulawesiensis Pesic & Smit, 2009, sp. nov.
Creators: name: Pesic, Vladimir
name: Smit, Harry
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Hygrobatidae
Atractides
Atractides sulawesiensis

description: Atractides (Tympanomegapus) sulawesiensis sp. nov.
(Figs. 20A–B, 21A–C)
Atractides neoclipeatus (non Lundblad, 1971) — Smit (1996) Type material. Holotype: female dissected and slide mounted in Hoyer's fluid. INDONESIA, Sulawesi Utara: S. Tumokang, at park headquarters, Dumoga-Bone NP, 9.iv.1990, leg. Smit. Paratype: one female, S. Toput, tributary of S. Tumokang, 23.iv.1991, leg. Smit.
Diagnosis. Gnathosoma elongated; P-4 sword seta pointed, little enlarged, but not hair-like; P-5 with ‘cheeks’; leg claws with dorsal clawlets.
Description. General features. Integument dorsally striated. Muscle attachment plates unsclerotized. Coxal field: caudal margin of Cx-1+2 medially tongue-shaped, apodemes of Cx-2 forming an acute angle. Genital field: Ac in triangular arrangement; excretory pore smooth; Vgl-1 fused with Vgl-2. Palp: P-4 with straight and equally curved dorsal margin, sword seta of P-4 pointed, little enlarged, but not hair-like, inserted near distoventral hair, P-5 with ‘cheeks’. I-Leg: little modified, S-1/2 close together, S-1 slightly curved inwards with blunt tip, S-2 with pointed, stiletto-like tip.
Female (holotype, in parentheses some measurement of paratype): Idiosoma L/W 763/631. Coxal field (Fig. 20A): L 358, Cx-3 W 416, Cx-1+2 mL 106, Cx-1+2 lL 253. Palp (Figs. 21 A-B): palp total L 327 (329), dL: P-1 56 (53), P-2 66 (70), P-3 71 (71), P-4 101 (102), P-5 33 (33); %L: P-1 17.1 (16.1), P-2 20.2 (21.3), P- 3 21.7 (21.6), P-4 30.9 (31.0), P-5 10.1 (10.0); L P-2/P-4 0.65 (0.69); chelicera (Fig. 21C) total L 296 (329), basal segment L 256 (247), claw L 98 (109), L ratio basal segment/claw 2.6 (2.3), capitulum (Fig. 21A) ventral L 268. Genital field (Fig. 20A): pre – and postgenital sclerites strong, L/W 141/169, genital plate L 95- 100, L Ac-1-3: 33-37-34.
I-Leg (Fig. 20B): I-Leg-5 dL 153 (155), vL 115 (119), dL/vL 1.33 (1.3), HB 36 (34), dL/HB 4.3 (4.6), S-1 L 56 (52), L/ W 12.3 (11.3), S-2 L 56 (58), L/ W 10.6 (8.5), distance of sword setae at I-Leg-5 5 (4), L S-1/2 1.0 (0.9); I-Leg-6 L 114 (117), HB 22 (21), L/HB 5.2 (5.5); L I-Leg-5/6 1.34 (1.32).
Male. Unknown.
Remarks. Due to the presence of elongated capitulum and a little enlarged, not hair-like sword seta on P- 4, the new species resembles Atractides neoclipeatus Lundblad, 1971 from Java, Indonesia. Atractides sulawesiensis sp. nov. can be distinguished easily from A. neoclipeatus in the presence of ‘cheeks’ on P-5 and dorsal leg clawlets.
Atractides talinarostris Cook, 1967 (Maharashtra, India), a species similar in having dorsal leg clawlets and an enlarged, not hair-like sword seta on P-4, differs in the absence of ‘cheeks’ on P-5 and a less elongated capitulum.
Atractides clipeatus (K. Viets, 1935) (Sumatra, Indonesia), A. jukii Cook, 1967 (Maharashtra, India) and A. latisetus Jin, 1997 (Guizhou, China) differ from A. sulawesiensis sp. nov., in the absence of dorsal leg clawlets, less elongated capitulum, unfused Vgl-1and -2 and presence of hair-like sword seta on P-4. The two later species differ additionally in the absence of ‘cheeks’ on P-5.
Within the Western Palaearctic region, due to narrow setal interspace, presence of dorsal clawlets on leg claws, fused Vgl-1+2 and the enlarged sword seta on P-4, Atractides sulawesiensis sp. nov., is most similar to A. moniezi (Motaş, 1927), a species known from Central Europe and Russia (Gerecke 2003), but differs from it in the presence of ‘cheeks’ on P-5 (without lateral ‘cheeks’ in A. moniezi) and more more elongated capitulum.
Etymology. The species is named after the Sulawesi, where this species was collected.
Distribution. Sulawesi.
description: Published as part of Pesic, Vladimir & Smit, Harry, 2009, New records of water mites of the genus Atractides Koch, 1837 (Acari: Hydrachnidia, Hygrobatidae) from Thailand, Malaysia and Sulawesi (Indonesia), with the description of four new species, pp. 1-30 in Zootaxa 2240 on pages 27-30, DOI: 10.5281/zenodo.190536