Torrenticola (s.str.) laskai Di Sabatino, 2009

Özdilek, Murat & Esen, Yunus, 2023, New records of water mite (Acari, Hydrachnidia, Torrenticolidae) species for the Turkish fauna, Acarological Studies 5 (1), pp. 34-41 : 34-35

Torrenticola (s.str.) laskai Di Sabatino, 2009

Description

Male. Idiosoma sligthly ovally, L/W 605/540 ( Fig. 1B ); frontal and shoulder plate long, frontal plates L/W 128/60, shoulder plate L/W 199/70, dorsal shield L/W 577/473 ( Fig. 1A ); subcapitulum vL 308, rostrum L 121, chelicera L 354, claw L 50, P-2 as long as P-4, ventral decticle of P-4 located in distal part ( Fig. 1C ), dL P-1 41, P-2 91, P-3 56, P-4 90, P-5 20; palp total L 298; genital field L/W 168/132, Cx-I mL 130, Cx-II+III mL 108 (ratio length Cx-I/Cx-II+III 1.2), gnathosomal bay L 140, distance between genital field and excretory pore 107 ( Fig. 1B ); dL of leg segments I-L-1-6: 40-80-83-90-93-95 = 481, II-L-1-6: 48-82-75-94-103-105 = 507, III-L-1-6: 60-95-82-100- 110-122 = 569, IV-L-1-6: 110-100-122-140-156-148 = 786.

Female. Idiosoma L/W 735/662 ( Fig. 2A ); frontal and shoulder plate long, frontal plates L/W 146/70, shoulder plate L/W 211/90, dorsal shield L/W 700/557; subcapitulum vL 345, rostrum L 133 ( Fig. 2C ), chelicera L 415, claw L 60 ( Fig. 2D ), dL P-1 37, P-2 110, P-3 59, P-4 99, P-5 17; genital field L/W 185/184, Cx-I mL 132, Cx-II+III mL 40, gnathosomal bay L 190, distance between genital field and excretory pore 190 ( Fig. 2B ); dL of leg segments I-L-1-6: 61-80-87-98-103-100 = 529, II-L-1-6: 70-80-83-105- 113-110 = 560, III-L-1-6: 71-83-81-121-149-136 = 641, IV-L-1-6: 120-110-129-160-184-178 = 881.

Distribution

Bosnia and Herzegovina, Bulgaria, Czechia, France (Corsice), Greece, Italy and Montenegro ( Di Sabatino et al., 2009, 2010). It is new record for the Turkish fauna.

Remarks

Torrenticola laskai is very similar to T. barsica (Szalay, 1933) . Males of T. barsica differ from T. laskai in shorter medial suture of Cx-II+III (L ratio Cx-I / Cx-II+III 1.3-1.8), shape of genital field (anteriorly slightly enlarged, forming an obtuse triangle, anterolaterally obtuse angled), in both sexes, palp segment P-2 longer than P-4. So, distinction of females of the two species may be impossible ( Di Sabatino et al., 2009, 2010). The Turkish male specimen is agree with T. laskai by the ratio length of Cx-I / Cx-II+III, genital field paralel sides, anterior margin smoothly convex, anterolateral angles rounded, P-2 and P-4 nearly equal in length. In female P-2 slightly longer than P-4, and the other characteristic features is agree with previously description of the species.

Figures

Figure 1. Torrenticola (s.str.) laskai (male). A. Dorsal shield, B. Idiosoma, ventral view, C. Palp, medial view (scale bars = 100).

Figure 2. Torrenticola (s.str.) laskai (female). A. Idiosoma, dorsal view, B. Idiosoma, ventral view, C. Gnatosoma, D. Palp, medial view (scale bars = 100).