Five new species of water mite genus Atractides Koch, 1837 from Bhutan with new records (Acari: Hydrachnidia: Hygrobatidae)
Author
PešićK, Vladimir
University of Montenegro, Cetinjski put bb, 81000 Podgorica, Montenegro.
Author
SmitK, Harry
Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, the Netherlands.
Author
GurungK, Mer Man
Department of Forest Science, College of Natural Resources, Royal University of Bhutan, Lobesa, & University of Montenegro, Cetinjski put bb, 81000 Podgorica, Montenegro.
text
Acarologia
2023
2023-01-30
63
1
148
168
journal article
2107-7207
Atractides
(
Atractides
)
indentatus
sp. nov.
Zoobank:
A07B4D67-582A-48DA-AD8C-D60DC8C3E700
Figures 9-10
Type material
—
Holotype
♂
, dissected and slide mounted (
NBC
),
Bhutan
,
MG3
Bipgang Chhu
,
27.15729°N
,
90.66721°E
,
596 m
asl
,
25 Oct. 2021
.
Paratypes
:
4♀
, same site and data as the
holotype
,
1♀
dissected and slide mounted (
NBC
).
Diagnosis
— Integument finely striated, muscle insertions unsclerotized; mediocaudal margin Cx-I+II deeply indented; Vgl-1 separate from Vgl-2; strong sexual dimorphism (in male P-2 with pointed distoventral projection, P-4 shortened, P-2/P-4 ratio 0.94), anterior margin of the male genital plate with a V-shaped indentation.
Description
—
General features
– Integument striated, muscle insertions unsclerotized; mediocaudal margin Cx-I+II deeply indented (
Figures 9A
,
10A
), caudal apodemes of Cx-II strongly protruding and forming an acute angle. Excretory pore smooth; Vgl-1 not fused to Vgl-2. Palp with a strong sexual dimorphism, P-4 sword seta stout, nearer to distoventral setae. I-L-5 setae S-1 and S-2 nearer to each other, bluntly pointed, S-1 longer than S-2; I-L-6 stout, proximally thickened, slightly curved (
Figures 9D
,
10C
).
Male
– Anterior and posterior margin of genital plate deeply indented, anterior indentation V-shaped, P-2 ventral margin with a strongly developed pointed distal extension, P-3 slightly concave, P-4 shortened, ventral margin slightly protruding at level of ventral setae (
Figure 9C
).
Female
– P-2 ventral margin convex distally, P-3/4 straight, P-4 slender than in male (
Figure 10B
).
Measurements
—
Male
– Idiosoma L 390, W 319; maximum diameter Dgl-4, 17. Coxal shield L 241; Cx-III W 280; Cx-I+II mL 63, Cx-I+II lL 150. Genital field L/W 101/118, ratio 0.85, L Ac-1-3: 39-41, 44-47, 34-36.
Palp – Total L 228; dL/H, dL/H ratio: P-1, 23/26, 0.91; P-2, 56/45, 1.24; P-3, 56/36, 1.57;
P-4, 60/31, 1.97; P-5, 33/13, 2.62; L ratio P-2/P-4, 0.94.
Legs – I-L-5 dL 142, vL 98, dL/vL ratio 1.46, maximum H 44, dL/maximum H 3.25, S-1 L
59, L/W ratio 5.3, S-2 L 53, L/W ratio 4.9, distance S-1-2, 5.0, dL ratio S-1/2, 1.12; I-L-6 dL
97, central H 20, dL/central H ratio 4.77; L I-L-5/6 ratio 1.47.
Female
– Idiosoma L 594, W 447; maximum diameter Dgl-4, 20. Coxal shield L 325; Cx-III W 391; Cx-I+II mL 63, Cx-I+II lL 175. Genital field L/W 144/164, genital plates L 109, pregenital sclerite W 59, gonopore L 103, L Ac-1-3: 41-47, 52-54, 47.
Palp – Total L 295; dL/H, dL/H ratio: P-1, 28/30, 0.94; P-2, 63/44, 1.43; P-3, 78/40, 1.96;
P-4, 85/27, 3.2; P-5, 41/15, 2.74; L ratio P-2/P-4, 0.73. Gnathosoma vL 72, chelicera total L
173.
Legs – I-L-5 dL 198, vL 145, dL/vL ratio 1.36, maximum H 51, dL/maximum H 3.9, S-1
L 77, L/W ratio 5.18, S-2 L 65, L/W ratio 4.41, distance S-1-2, 7.0, dL ratio S-1/2, 1.17; I-L-6
dL 125, central H 25, dL/central H ratio 5.0; L I-L-5/6 ratio 1.58.
Etymology
— The specific name refers to deeply indented mediocaudal margin of Cx-I+II.