Australiobates (Australiobates) archboldi Wiles, 1997

Smit, H., 2011, New Species Of Water Mites From New Guinea (Acari: Hydrachnidia, Halacaridae), Acarologia 51 (3), pp. 321-345 : 334-336

Australiobates (Australiobates) archboldi Wiles, 1997

Material examined — 10/10/0, River Pos 7, Sentani, 2°33.740 S 140°30.784 E, alt. 103 m a.s.l., 9- iii-2010 ; 5/5/2, Uwe River , Wamena, 4°06.521’ S; 138°56.310’ E, alt. 1668 m a.s.l., 24-iii-2010 ; 0/1/0, River Yabawi , upstream of Harapan, 2°34.216’ S; 140°33.723’ E, alt. 120 m a.s.l., 28-iii-2010 ; 1/0/0, River Kamp Walker , near UNCEN, Abepura, 2°34.202’ S; 140°38.886’ E, alt. 144 m a.s.l., 31-iii- 2010 .

Remarks — Previously reported from Papua New Guinea and Papua province ("Irian Jaya") by Wiles (1997a). Characteristic for the species are the curved distoventral setae of I-leg-5, one of these blunt, the other pointed

Australiobates (Australiobates) bruijni Wiles, 1997 ( Figure 8 )

Material examined — 0/1/0, River Rumei, Waigeo, New Guinea, 13-x-1993, leg. M. Argeloo.

Remarks — In the slender palp ( Figure 8b ), I-leg- 5 with two slender stout setae of which is longer than the other ( Figure 8c ) and the genital field with the acetabula lying almost in a line ( Figure 8a ), the specimen from Waigeo matches the description by Wiles (1997a). Thus far, the species has been reported from Papua New Guinea and Papua province (" Iran Jaya"), Indonesia.

Australiobates (Australiobates) hyalinus n. sp. ( Figures 9–10 )

Material examined — Holotype male, Bion River, upstream, Pass Valley, Papua Province, New Guinea, Indonesia, 3°51.294’ S; 139°05.733’ E, alt. 1962 m a.s.l, 15-iii-2010. Paratypes: 1 male, 2 females, same data as holotype ; one male, two females, Bion River , Pass Valley, 3°51.267’ S; 139°05.789’ E, alt. 1955 m a.s.l., 11-iii-2010 ; one female, Mulun stream, Pass Valley, 3°51.599’ S; 139°05.876’ E, alt. 1970 m a.s.l., 12-iii-2010 ; one female, Bion River , upstream, Pass Valley, 3°51.513’ S; 139°05.570’ E, alt. 2007 m a.s.l., 15-iii-2010 ; one male, two females, Bion River , upstream, Pass Valley, 3°51.513’ S; 139°05.570’ E, alt. 2007 m a.s.l., 15- iii-2010 .

Diagnosis — Legs with a row of hyaline setae, especially on fourth leg.

Description — Male: Idiosoma finely lineated, 348 (340 – 365) long and 300 (284) wide (measured dorsally). Idiosoma without platelets or reticulation. Gnathosoma with a long anchoral process. Coxoglandularia 4 near suture line of third and fourth coxal plates. Posterior apodemes of fourth coxal plates long ( Figure 9a ). Genital field with three pairs of acetabula, anteromedially with three setae. Genital field 86 long and 106 wide, gonopore 40 long. Lengths of PI-PV: 18, 44, 62, 64, 24; PIV with two small setae near ventral margin, lying close to each other ( Figure 9b ). Lengths of I-leg-4-6: 100, 104, 75; IV-leg-5 anteroventrally with two curved setae, one of these truncated. Lengths of IV-leg-4- 6: 160,156, 114. Fourth legs with hyaline setae: IVleg-3-6 with 7, 8, 3 and 0 of these setae, respectively ( Figure 9c ). Second and third legs with less hyaline setae. Swimming setae absent.

Female: Idiosoma finely lineated, 478 (383 – 535) long and 356 (308 – 446) wide (measured dorsally). Idiosoma without platelets or reticulation. Gnathosoma with a long anchoral process. Coxoglandularia 4 near suture line of third and fourth coxal plates. Posterior apodemes of fourth coxal plates long ( Figure 10a ). Genital field with three pairs of acetabula, triangular in shape, extending well posterior of post-genital sclerite. Gonopore 112 long, pre-genital sclerite 40 wide, post-genital sclerite 60 wide. Lengths of PI-PV: 28, 58, 88, 92, 28; palp as in male, but small setae near ventral margin of PIV more distanced of each other. Lengths of I-leg-4- 6: 134, 126, 96; first leg as in male, anteroventrally with two curved setae, one of these truncated ( Figure 10b ). Lengths of IV-leg-4-6: 202, 200, 150. Legs with hyaline setae, especially on the fourth leg: IVleg-3-6 with 7, 9, 3 and 0 of these setae, respectively. Other legs with only a few hyaline setae. Swimming setae absent.

Etymology — Named for the hyaline setae of the legs.

Remarks — The presence of hyaline setae on the dorsal margin of the legs is characteristic for the new species. Australiobates plumosa Wiles, 1997 has somewhat similar setae, but these are more numerous and plumose.

Figures

FIGURE 8: Australiobates bruijni Wiles, female: a – genital field; b – palp; c – I-leg-5-6. Scale bar = 50 µm.

FIGURE 9: Australiobates hyalinus n. sp., holotype male: a – ventral view; b – palp; c – IV-leg-4-6. Scale bar = 50 µm.

FIGURE 10: Australiobates hyalinus n. sp., paratype female: a – ventral view; b – I-leg-5-6. Scale bar = 50 µm.