Drepanosira gisini Nosek, 1964

Rabieh, Mohammad Mahdi, Shayanmehr, Masoumeh, Yoosefi Lafooraki, Elham & Noei, Javad, 2023, Three new records of Collembola (Hexapoda) from Birjand (South Khorasan, Iran), Journal of Insect Biodiversity and Systematics 9 (3), pp. 527-533 : 529

Drepanosira gisini Nosek, 1964 ( Figs 1C–1E)

Material examined. South Khorasan province, Birjand, Esfahrud , 32°47.01'N, 59°17.59'E, Leaf litter, 1888 m, 26.v.2019 , n=11; Razag , 32°47.42'N, 59°15.39'E, Leaf litter, 1836 m, 06.v.2019 , n=2; Band-darreh , 32°49.11'N, 59°13.00'E, Soil, 1682 m, 11.v.2019 , n=1; Chahkand , 32°49.55′N, 59°09.37′E, Leaf litter, 1716 m, 31.v.2019 , n=4; Kuhestan Hotel , 32°49.40'N, 59°10.48'E, Leaf litter, 79 m, 13.v.2019 , n=2; Giuk waterfall, 32°47.31'N, 59°07.33'E, Soil, 1961 m, 17.v.2019 , n=4; Chahardeh , 32°48.52'N, 59°14.16'E, Leaf litter, 1658 m, 21.v.2019 , n= 2, leg. M.M. Rabieh.

Diagnosis. Body colour pattern as Figure 1C. Diagnostic characters of the species according to Nosek (1964) is as below: “Body length 2.6 mm excluding antenna and furca, main colour yellowish white. The dark, black-blue pigments cover the anterior and lateral margins of the head, lateral margins of thoracic segments II and III and form torn spots on thoracic segment II, abdominal segments II and III. On Abd IV the pigments form a torn, zigzag transverse band as in Willowsia nigromaculata . Antenna and dorsal side of the manubrium and ventral side of the abdomen are bluish. A black spot appears at the base of the legs and femur. The body has plenty of bristles and is covered with narrow, pointed, fine scales ( Fig. 1D). Antenna: head diagonal= 69.5: 23. Relative length of antennal segments I: II: III: IV= 9.5: 19.5: 19.5: 21. The sensory organ of antennal segment III consists of two short sensory rods, each standing in a small depression and protected by an integumentary fold. Ant IV with dense but short bristles, with a lateral papilla at the apex. Eyes 8+8, GH significantly smaller than the others. Labrum near the anterior margin with a transverse row of four tiny papillae; each is armed with a fine, short brush. Th II: Th III = 17: 11. Claw narrow, armed with a small outer tooth, indistinct lateral teeth and 3 inner teeth. Empodial appendage narrow, lanceolate, ⅔ as long as inner edge of claw. Tibiotarsal hair severely twisted. Length ratio of Abdominal segments I: II: III: IV: V: VI = 9: 11: 9: 32: 8: 3. Manubrium: dens ratio = 26: 34. Mucro falcate with a long basal spine ( Fig. 1E), three times shorter than the inside of the claw. The unnotched terminal part of the dens is about 2 times longer than mucro”.

Distribution. Palaearctic. The species is reported for the first time from Iran.

Order Symphypleona Börner, 1901