The first record of Ceratotarsonemus (Acari: Tarsonemidae) from the Oriental region with description of a new species from West Bengal, India

Abstract

A new tarsonemid species Ceratotarsonemus bengalicus Karmakar and Kayal sp. nov. is described from specimens collected on leaves of the mandarin orange, Citrus reticulata (Rutaceae), in Rishikhola, Kalimpong district, West Bengal, India. This is the first record of the genus Ceratotarsonemus De Leon, 1956 in the Eurasian mainland. An updated key to the species of Ceratotarsonemus is provided.

Description of two new species of Tarsonemus (Acari: Tarsonemidae) from the Southern Plateau and Hill Region of India

“…Subtriangluar, length 29 (28-31), maximum width 24 (23)(24)(25)(26). Seta dgs 10 (9-11) and vgs 11 (10)(11), subequal, both smooth; seta pp indiscernible. Palpi directed anteriorly, sub parallel each with very minute setae and minute teeth like processes anteriorly.…”

“…Bothridial seta sc1 club shaped, spinose, located ventrolaterally, nearly at same level of setae sc2, covered by prodorsal shield. Length of setae: v1 39 (37-41), sc1 16 (14-17), sc2 54 (51-56), c1 11 (10)(11)(12), c2 20 (19)(20)(21), d 9 (8-10), e 11 (10)(11), f 9 (9-10), h 9 (8-9). All dorsal setae serrated.…”

“…Seta d of tibia I 27 (25-28) long, stout, serrated; seta v' 10 (9-11), seta v'' 14 (13)(14)(15), both smooth; seta l' 7 (6-7), seta l'' 9 (8-9), both smooth. Genu I with seta l'' 12 (11)(12)(13), seta l' 7 (7-9), both smooth. Femur I with seta d 6 (5-6), smooth; seta l' 10 (9-11), setiform.…”

“…Claw of leg I strong, curved and hook shaped with blunt tip, 3(3-4) long. Solenidion ω of tarsus II proximal, 4 (4-5) clavate; seta pl'' 3 (3)(4), smooth, minute, setiform, inserted posterior solenidion ω; tc' 18(16-19), tc'' 12 (11)(12)(13), both smooth. Seta d of tibia II 8 (7-9) long, smooth.…”

Description of two new species of genera Daidalotarsonemus and Floridotarsonemus (Acari: Tarsonemidae) from West Bengal, India

“…In terms of the status of Indian Tarsonemidae, 42 species have been documented to date (Kayal & Karmakar 2023a, b, 2024), out of which 30 were described recently. Twenty six out of 30 newly described species were discovered from the state of West Bengal alone (87% of the total described new species of the country), which indicate two impressions, viz.…”