Hydrachna globosa lacerata Lundblad, 1969

Pešić, Vladimir, Smit, Harry & Saboori, Alireza, 2012, 3330, Zootaxa 3330, pp. 1-67 : 12

Hydrachna globosa lacerata Lundblad, 1969

( Fig. 6A – C)

Material examined. Iran, Sistan va Baluchestan Province, IR5-2011, Gerdoig village N of Chabahar, 5 km of Koch village , pool, 25º 46.084 N, 60º 54.968 E, 13.vii.2011 0/6/1 (0/1/1 mounted) .

Morphology. Female — Idiosoma L 1809–2440; paired frontal plates ( Fig. 6C), L/W 500/288, separated from each other by membranous integument; coxal field: L 619, W 1187, medial margin of Cx-III+IV concave, Cx-IV bearing one seta, posteromedial corner of Cx-IV extended with cleaver-shaped posterolaterally directed secondary sclerotization; genital field ( Fig. 6A) L/W 197/263. Gnathosomal rostrum L 356, relatively long and curved; chelicera L 744; palp ( Fig. 6B): total L 663; dL (in parentheses dL/H ratio): P-1, 181 (1.0); P-2, 150 (1.4); P-3, 213 (3.1); P-4, 88 (2.1); P-5, 31 (1.7); palp slender, P-1 bearing one dorsodistal seta, P-2 ventral margin slightly concave or straight. Legs: dL of I-L: 70, 175, 105, 119, 144, 172; dL of IV-L: 216, 216, 186, 297, 283, 222.

Deutonymph (collected together with adults of Hydrachna globosa lacerata at IR5-2011 and suspected to represent this species). — Idiosoma L/W 1138/925; frontal plate L/W 241/122; coxal field L 384; individual provisional genital plate L/W 128/84; gnathosomal rostrum L 167; chelicera L 441; palp: total L; dL: P-1, 102; P-2, 92; P-3, 108; P-4, 55; P-5, 30. Legs: dL of I-L-2-6: 98, 62, 72, 94, 126; dL of IV-L: 125, 117, 97, 166, 184, 175.

Remarks. The third Hydrachna species collected from a pool near Gerdoig village resembles Hydrachna globosa (De Geer, 1778) . Our specimens are assigned to the Oriental subspecies, H. globosa lacerata Lundblad, 1969 , known only from a female from Burma ( Lundblad 1969). Compared with the stem species, this subspecies has more broad and relatively short frontal plates, a more slender P-3 (L/H ratio 3.1) and extended posteromedial extensions of the fourth coxal plates. Additional information on the population variability of H. globosa lacerata , and the description of the male, are necessary to resolve the taxonomy of this taxon.

Habitat. Standing waters ( Fig. 8A).