Microliobunum erseni, Kurt & Online & Version, 2018

Kurt, Kemal, Online, Published & Version, Final, 2018, A new species of the genus Microliobunum from Turkey (Opiliones, Sclerosomatidae), Turkish Journal of Zoology 42 (4), pp. 389-393 : 389-393

Microliobunum erseni sp. nov. ( Figures 1–7 )

Material. Holotype: ♂ ( GUSAL), Turkey: Kilis Province, Akçağıl village (36°46′50″N, 37°25′58″E), 752 m, 13

September 2013, leg. E. A. Yağmur. - Paratypes: 1 ♂, 4 ♀♀ ( GUSAL) ; 2 ♀♀ ( AZMM = Alaşehir Zoological Museum , Manisa), same data as holotype .

Diagnosis: Microliobunum erseni sp. nov. differs from Microliobunum brevipes by the following morphological characters: body dorsally dark brown with light brown spots (pale yellow in M. brevipes ), tibiae of legs II and IV without pseudosegments ( II with two pseudosegments and IV with one pseudosegment in M. brevipes ).

Description. Male: Body length 3.25 mm; width 2.25 mm; chelicerae: basal segment 0.58 mm; distal segment 1.05 mm.

Body ( Figure 1 ): Approximately oval-shaped in dorsal view. Cephalothorax with slightly raised area in front of ocular tubercle. Cephalothorax covered with granules; between cephalothorax and abdomen, a deep rift along transverse line; abdomen dome-shaped and granular. Body ventrally bearing only granules. Genital operculum with lateral rows of three minute pointed granules and scattered small spines.

Ocular tubercle: Nearly equal in length and width, narrowed basally, with obtuse tubercles; light yellow stripe in two rows. Supracheliceral lamellae consisting of two obtuse black tubercles covered with numerous small granules.

Chelicerae ( Figure 2 ): Not enlarged. Basal segment with spur ventrally, dorsally with 1–2 spines; distal segment covered with setae.

Pedipalps ( Figure 3 ): Without apophysis, strong; coxae with finger-shaped apophysis; trochanters with black tubercles and spines ventrally, dorsally with 1-2 spines; femora covered with black tubercles and spines ventrally; patella with black spines and setae laterally and dorsally; tibia with spines and setae; tarsus bearing only setae, but male tarsus covered with microdenticles ventrally, tarsal claw coarsely (3–6 teeth) pectinate. Length of palpal segments: femur 0.67, patella 0.32, tibia 0.41, tarsus 0.88; total length 2.28 mm.

Legs: Short, robust; pairs I and III slightly thicker; femur I shorter than length of body; femur IV with S-shaped curve, the lower half of which follows the shape of abdomen; coxae with lateral rows of three black minute pointed granules. All segments (except tarsus) covered with black microdenticles, tarsus bearing only setae, tarsal claw smooth. Length of legs (in mm): I 1.7 + 0.66 + 1.42 + 1.5 + 2.5 = 7.78, II 2.7 + 0.76 + 2.39 + 2.5 + 5.5 = 13.85, III 1.65 + 0.67 + 1.43 + 1.7 + 3.4 = 8.85, IV 2.5 + 0.73 + 2.14 + 1.8 + 4 = 11.17.

Male genital morphology ( Figure 4 ): Truncus wide at base, narrowed towards subapex; widening again, taking form of wings; glans in straight prolongation of truncus, tapering into stylus; stylus short, acute.

Coloration: Body dark brown, with round, elongated light brown spots. Basal segment of chelicerae dark brown, distal segment light brown. Pedipalps light brown (tarsus light yellow). Legs dark brown.

Figures

Figure 1. Body of Microliobunum erseni sp. nov.: a) female, dorsal view; b) male, dorsal view.

Figure 2. Chelicera of Microliobunum erseni sp. nov.: a, b) chelicera, mesal and lateral view, male; c, d) chelicera, mesal and lateral view, female.

Figure 3. Pedipalp of Microliobunum erseni sp. nov.: a, b) pedipalp, mesal and lateral view, male; c, d) pedipalp, mesal and lateral view, female.

Figure 4. a, b) Penis of Microliobunum erseni sp. nov., ventral view.