Isotomurus pseudopalustris Carapelli, Frati, Fanciulli & Dallai, 2001

Mandal, Pritha, Mandal, Guru Pada, Suman, Kusumendra Kumar, Bhattacharya, Kaushik Kumar & Kumari, Simran, 2024, Taxonomic insight on some newly recorded species of the springtails (Hexapoda: Collembola) from North Eastern and Eastern states of India, Journal of Insect Biodiversity and Systematics 10 (2), pp. 215-229 : 219-221

Isotomurus pseudopalustris Carapelli, Frati, Fanciulli & Dallai, 2001 ( Fig. 4).

Material examined. 51 specimens, India, Arunachal Pradesh, West Kameng district, 4 km away from Bomdila towards Pedung , collected from leaf litter, 27°16'01.2"N 92°24'43.2"E, 2561 m a.s.l., 27-III-2023, leg. G. P. Mandal, reg no.- 3435/H14 .

Diagnosis. Average body length about 1.9 mm (three specimens). Antennae: head diagonal 1.4: 1. Body colour dirty white with differential pigment patches mainly on the lateral portion of the body, dark uninterrupted dorso-median black band conspicuous. Antennae, coxa and tita uniformly brown pigmented ( Fig. 4A).

Antennal segment ration I: II: III: IV- 1: 1.4: 1.5: 2.1. Ant. IV with a prominent pin chaeta ( Fig. 4D) and Ant. III with two small curved sense rods ( Fig. 4B). Base of Ant. I with 8–9 small smooth chaetae. PAO oval shaped 0.5 times to nearer omma ( Fig. 4C). Md. with four basal as well as rear teeth. Unguis with one inner and outer tooth, Emp. lanceolate with corner edge. Hind tita with 5 large ciliated chaetae. VT with 4+4 chaetae. Tenaculum quadridentate. Manubrium: dens- 1: 2.27, covered with numerous smooth setae. Mucro with four teeth, without chaeta ( Fig. 4E).

Distribution in India. Arunachal Pradesh.

General distribution. Mediterranean region ( Bellinger et al., 1996 –2024).

Remarks. This species was first reported not only from India but also from the Asian continent. The species is similar to I. palustris - in most aspects expect some differences in the colour pattern, the latter one has relatively less pigmentation in the lateral portion and the median longitudinal band becomes lighter in the last few segments ( Potapov, 2001).