Monatractides gledhilli Pesic & Smit, 2009, sp. nov.
Creators: name: Pesic, Vladimir
name: Smit, Harry
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Torrenticolidae
Monatractides
Monatractides gledhilli

description: Monatractides gledhilli sp. nov.
(Figs. 75–84)
Type material. Holotype: male dissected and slide mounted in Hoyer's fluid. Thailand: Pong Creek crossing road to Muang Kong, Doi Chiang Dao, 477 m asl, 22.xi.2007, 19° 24.774 N 98° 55.127 E, leg. Smit. Paratypes: 6/0/0 (2/0/0 mounted), same collecting site and data as holotype.
Diagnosis: three pairs of knob-shaped protrusions at the margin of the capitular bay; pointed, V-shaped capitular bay; Cxgl-4 subapical; capitulum with shorter rostrum; P-3 with two strong ventrodistal setae, P-4 with well visible denticle near the insertion of the ventral hairs.
Description. Male (holotype, in parentheses measurements of two paratypes): Idiosoma (ventral view: Fig. 76) L 794 (813–831), W 631 (606–638); dorsal shield (Fig. 75) L 681 (675–694), W 506 (531–537), L/W ratio 1.35 (1.26–1.31); dorsal plate L 644 (638–656); shoulder plate L 213 (194–213), W 67 (66), L/W ratio 3.2 (2.9–3.2); frontal plate L 116 (122–123), W 63 (63), L/W ratio 1.8 (1.9–1.94); shoulder/frontal plate L ratio 1.8 (1.6–1.75); capitular bay L 150 (152–154), W 41, L/W ratio 3.7; Cx-1 total L 288 (287–294), Cx-1 medial L 138 (131–142), Cx-2+3 medial 91 (92–102); ratio Cx-1 L/Cx-2+3 medial L 3.2 (2.8–3.2); Cx-1 medial L/Cx-2+3 medial L 1.5 (1.3–1.54); genital field L/W 156 (156–162)/119 (113–116), L/W ratio 1.3 (1.38–1.4), ejaculatory complex (Fig. 79) L 199 (206); distance genital field–excretory pore 159 (148–156), genital field–caudal idiosoma margin 237 (256–272); capitulum (Fig. 80) ventral L 150 (139–149); chelicera (Fig. 81) L 174 (183–185); palp (Figs. 77, 83–84) total L 229 (225–230), L: P-1 26 (26–27), P-2 65 (65–66), P-3 46 (44), P-4 59 (60–61), P-5 33 (29–33); %L (given as % of total L): P-1 11.4 (11.6–11.7), P-2 28.4 (28.3–29.3), P-3 20.1 (19.1–19.6), P-4 25.8 (26.5–26.7), P-5 14.4 (12.9–14.3); P-2/P-4 ratio 1.1 (1.07–1.1); P- 4 with well visible denticle near the insertion of the ventral hairs; L I-Leg-4-6 (Fig. 82): 118 (118–120), 111 (111), 112 (109–110).
Discussion. Due to the presence of three pairs of knob-shaped protrusions at the margin of the capitular bay, a capitulum with shorter rostrum, and a pointed, V-shaped capitular bay, M. gledhilli sp. nov. is similar to M. tristis (Lundblad, 1941b) (in parentheses data taken from Lundblad 1967), from which it can be easily distinguished by its smaller idiosoma and palp dimensions (e.g., idiosoma L 1017, dorsal shield L 845, genital field L/W 218/182, palp total L 258). Further differences regard subapical Cxgl-4, the presence of two strong ventrodistal setae on P-3, and a P-4 with a well visible denticle near the insertion of the ventral hairs.
Etymology. This species in named after Terry Gledhill (UK) in appreciation of his studies of water mites. Distribution. Thailand; only known from the locus typicus.
description: Published as part of Pesic, Vladimir & Smit, Harry, 2009, Water mites of the family Torrenticolidae (Acari: Hydrachnidia) from Thailand, Part II. The genus Monatractides K. Viets, pp. 1-27 in Zootaxa 2012 on pages 17-20, DOI: 10.5281/zenodo.185830