Atractides (Atractides) ivanae, Pešić & Smit, 2021
publication ID |
https://doi.org/ 10.24349/acarologia/20214434 |
publication LSID |
lsid:zoobank.org:pub:145A84E6-3C8C-4D80-9D9E-B77CAF2A3227 |
persistent identifier |
https://treatment.plazi.org/id/EB704886-6D27-4A4B-965A-16679CEF8999 |
taxon LSID |
lsid:zoobank.org:act:EB704886-6D27-4A4B-965A-16679CEF8999 |
treatment provided by |
Marcus |
scientific name |
Atractides (Atractides) ivanae |
status |
sp. nov. |
Atractides (Atractides) ivanae n. sp.
Zoobank: EB704886-6D27-4A4B-965A-16679CEF8999
Figures 11-12 View Figure 11 View Figure 12
Type material — Kyrgyzstan: Holotype ♂, dissected and slide mounted ( RMNH), KR27 About RMNH river along the road to Son Kol Lake , 41°56.487 ′ N, 75°35.272 ′ E, 2428 m a.s.l., 15 Aug. 2013, GoogleMaps
leg. Pešić & Smit; 1♀, KR14 Karakal region, road to May Saz pass, stream, 42°25.033 ′ N, 79°02.657 ′ E, 3348 m a.s.l., 12 Aug. 2013, leg. Pešić & Smit, dissected and slide mounted ( RMNH); KR15 Karakal region, road to May Saz pass, fast flowing river, 42°25.004 ′ N,
78°58.100 ′ E, 2981 m a.s.l., 12 Aug. 2013, leg. Pešić & Smit, 2♀.
Diagnosis — Integument striated; genital field with acetabula in a weakly curved line,
Ac subtriangular in shape; excretory pore smooth; Vgl-1 not fused to Vgl-2; seta S-1 bluntly pointed, not apically truncated; I-L-6 stout (L/H <5.0 in ♂, <6.0 in ♀) and relatively short, L I-L-5/6 ratio 1.5-1.9. Males: P-2 and P-3 ventrally each with a distinct protrusion; P-4 ventral setae very long, exceeding length of the segment. Genital plate anterior margin slightly convex or straight, not indented, Ac-3 subtriangular, not elongated. Female: P-3 without central thickening of its ventral margin.
Description — General features — Integument striated, muscle insertions unsclerotized; mediocaudal margin Cx-I convex, apodemes of Cx-II in in an acute angle with the median line; posterior margin of Cx-IV with short posterior extension ( Figure 11A View Figure 11 ). Ac in an weakly curved line, subtriangular in shape. Excretory pore smooth; Vgl-1 not fused to Vgl-2. Palp with strong sexual dimorphism, P-4 sword seta near distoventral hair. I-L-5 setae S-1 and S-2 distally narrowed, bluntly pointed, S-1 longish, S-2 proximally enlarged, distance S-1-2 short; I-L-6 stout, slightly curved, proximally thickened ( Figure 12 View Figure 12 C-D). Male — Genital plate anterior margin slightly convex or straight, posterior margin indented ( Figure 11A View Figure 11 ); P-2 and P-3 each with a strong lamellar ventral extension, P-4 slightly protruding near proximoventral seta, ventral setae very long, exceeding the length of the segment ( Figure 12A View Figure 12 ). Female — P-2 without projection, ventral margin slightly protruding distally, P-3/4 nearly straight ( Figure 12B View Figure 12 ).
Measurements. Male (holotype) — Idiosoma L 697, W 494; maximum diameter Dgl-4, 23. Coxal shield L 353; Cx-III W 413; Cx-I+II mL 125, Cx-I+II lL 266. Genital field L/W 123/145, ratio 0.85, L Ac-1-3: 43-45, 47-50, 42. Ejaculatory complex ( Figure 11B View Figure 11 ) L 139.
Gnathosoma — Palp total L 335; dL/H, dL/H ratio: P-1, 38/34; 1.1; P-2, 71/58, 1.23; P-3,
80/48, 1.65; P-4, 110/41, 2.7; P-5, 36/16, 2.3; length ratio P-2/P-4 0.65. Gnathosoma vL 134;
chelicera total L 259.
Legs — I-L-5 dL 225, vL 169, dL/vL ratio 1.33, maximum H 59, dL/maximum H 3.8, S-1
L 77, L/W ratio 7.0, S-2 L 70, L/W ratio 5.6, distance S-1-2, 14, dL ratio S-1/2 1.1; I-L-6 dL
119, central H 28, dL/central H ratio 4.2; L I-L-5/6 ratio 1.89.
Female (specimen from KR14, n = 1) — Idiosoma L 481, W 318; maximum diameter Dgl-4, 32. Coxal shield L 331; Cx-III W 359; Cx-I+II mL 95, Cx-I+II lL 203. Genital field
L/W 178/172, genital plates L 114-116, pregenital sclerite W 109, gonopore L 148, L Ac-1-3:
40-41, 38-39, 34-36. Egg maximum diameter (n =1) 184.
Gnathosoma — Palp total L 348; dL/H, dL/H ratio: P-1, 34/28, 1.2; P-2, 75/49, 1.52; P-3,
92/39, 2.35; P-4, 109/30, 3.7; P-5, 38/16, 2.4; length ratio P-2/P-4 0.69. Gnathosoma vL 123;
chelicera total L 180.
Legs — I-L-5 dL 187, vL 139, dL/vL ratio 1.34, maximum H 52, dL/maximum H 3.6, S-1
L 80, L/W ratio 7.8, S-2 L 80, L/W ratio 5.7, distance S-1-2, 11, dL ratio S-1/2 1.0; I-L-6 dL
122, central H 22, dL/central H ratio 5.6; L I-L-5/6 ratio 1.53.
Etymology — The new species is named after Ivana Pozojević (Zagreb, Croatia) in appreciation of her work on water mites.
Discussion — The presence of a strong ventral protrusion on P- 3 in males, makes the new species similar to A. gibberipalpis Piersig, 1898 , A. inflatus (Walter, 1925) and A. yunusi n. sp.
(see below). Atractides gibberipalpis , a rhitrobiontic species from the Palaearctic ( Sokolow
1940, Gerecke 2003, Pešić et al. 2004, Pešić and Erman 2006) differs from both new species from Kyrgyzstan in the shape of male genital plate (Ac larger, Ac-3 elongated, drop-shaped, anterior margin more or less indented; see Figure 13D View Figure 13 ). Atractides inflatus differs in having lineated integument, in the both sexes I-L-6 relatively long, L I-L-5/6 ratio 1.3-1.4, in male the protrusions of P-2 and -3 more laterally flattened, and in female the both P-2 and P-3 with a gentle central thickening covered by fine denticulation ( Gerecke 2003). For similarities and differences in comparison with Atractides yunusi , see below in discussion of the latter species.
Distribution — Kyrgyzstan ; know from the high-order streams in Tien Shan mountains at an elevation from 2,400 to 3,400 meters.
RMNH |
National Museum of Natural History, Naturalis |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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