Diptilomiopus mohanasundarami, Chakrabarti & Sur & Sarkar, 2019

Chakrabarti, Samiran, Sur, Surajit & Sarkar, Sanjay, 2019, Two new species of Diptilomiopus Nalepa (Acari: Eriophyoidea) from India, Acarologia 59 (3), pp. 383-394 : 388-391

Diptilomiopus mohanasundarami n. sp.

( Figures 3 , 4 )

Diptilomiopus mangiferae Sarkar, 2011: 125 . Invalid name, a thesis name.

Zoobank: http://zoobank.org/act/ 5FCE349F-A4EE-4EC0-9D12-49A3CAFB2DA7

Description

Female (n=15) — Live colour brown. Body fusiform, 146 (142–157), 74 (74–75) wide. Gnathosoma: 49 (46–49), abruptly curved down, palp setae d 7 (7–8), palp setae ep 3 (2–3). Prodorsal shield: 31 (31–33), 63 (63–64) wide; prodorsal shield with a central cell and a row

of 12 cells on the anterior margin, besides, one cell below and one cell lateral to the central cell, other cell architecture on the posterior half of prodorsal shield not distinct; scapular tubercles 2 (2–3) and located ahead of shield margin but scapular setae sc absent. Leg I: 27 (27–29), femur 16 (16–17), femoral setae bv absent; genu absent; tibia 5 (4–5), tibial setae l′ absent; tarsus 6 (5-6), tarsal setae ft′ 39 (38–39), tarsal setae ft″ 38 (38–40), setae u′ 2 (2–3); empodium em 10 (10–12), deeply divided, each branch 6-rayed, solenidion ω 9 (9–10), knobbed. Leg II: 24 (24– 25), femur 14 (14-15), femoral setae bv absent; genu absent; tibia 4 (3–4), tibial setae l′ absent; tarsus 5 (5-6), tarsal setae ft′ 34 (34-35), tarsal setae ft″ absent, setae u′ 2 (2–3); empodium

em 10 (10–12), deeply divided, each branch 6-rayed, solenidion ω 9 (9–10), knobbed. Coxae

I: 14 (14–15), jointed at base, with granules, sternal line present; setae 1b absent; setae 1a 25 (24–26) and 5 (5–6) apart; coxae II: 13 (13–14), smooth, setae 2a 49 (48–50) and 13 (13–14)

apart, setae 1a located little ahead of 2a. Opisthosoma: dorsal annuli 58 (58–60) and little undulated; ventral annuli 53 (52–55), with small, roundish microtubercles till 46 th annuli, last

7 (7–8) ventral annuli with elongated and linear microtubercles; setae c2 absent; setae d 12 (11–12) on ventral annulus 16; setae e 10 (10–11) on ventral annulus 27; setae f 18 (17–18) on ventral annulus 42; setae h1 absent, setae h2 32 (32–33). Genital coverflap: 16 (16–17), 22 (22–23) wide, with very few granules on the basal part, setae 3a 9 (9–10). Internal genitalia: Apodeme short, spermathecae rounded with short funnel-like spermathecal tubes.

Male — Not found.

Etymology — The specific epithet is masculine in gender and derived after the name of Prof. M. Mohanasundaram, eminent Acarologist from India.

Type material — Holotype (circled): female (slide no. 1829/174/2017), 13 Jan. 2017, Kalyani (22˚98′56″N, 88˚26′44″E, alt. 11 m a.s.l.), Nadia, West Bengal, India, from Mangifera indica (L.) ( Anacardiaceae ), coll. S. Sur. Paratypes- 1 female and 2 nymphs in the slide bearing the holotype and 13 females and 8 nymphs (slide no. 1830-1833/174/2017), collection data as

in the holotype.

Additional specimens: 5 females and 2 nymphs (slide no. 1375/91/2006), 24 Dec. 2006,

30 females and 4 nymphs (slide no. 1376-1380/91/2007), 09 Oct. 2007, Amriti (24˚20′38″N, 87˚05′29″E, alt. 30 m a.s.l.), Malda, West Bengal from the same host plant, coll. S. Sarkar.

Relation to the host plant — Mites are vagrant on lower surface of leaves showing no apparent damage symptoms.

Differential diagnosis — Diptilomiopus mohanasundarami n. sp. shows most similarities with D. cerberae (Chandrapatya, 1998 in Boczek and Chandrapatya 1998) and D. meliae ( Boczek, 1998 in Boczek and Chandrapatya 1998) in having incomplete orientation of cells on posterior half of prodorsal shield and 6-rayed empodium. But D. mohanasundarami n. sp. can

be separated from the above species in having a total of 15 cells on prodorsal shield (20 cells in D. cerberae and 17 cells in D. meliae ).

Diptilomiopus mohanasundarami n. sp. remains distinct from D. panithus , another species

of Diptilomiopus on Mangifera indica (L.) in having the prodorsal shield with 15 cells; only the coxae I are granulated and the opisthosoma is provided with 58 dorsal annuli and 53 ventral annuli (in D. panithus 16 cells are present on prodorsal shield, both coxae are granulated and the opisthosoma is provided with 43 dorsal annuli and 60 ventral annuli). Apart from this, cellular orientations on the prodorsal shield are totally different. Here, a key is given to separate the Diptilomiopus species on Anacardiaceae .

Remarks — The name Diptilomiopus mangiferae appeared previously in the Ph.D thesis by Sarkar (2011) for D. mohanasundarami for this species.

Figures

Figure 3 Schematic drawings ofDiptilomiopus mohanasundaramin. sp.: female:- LM – lateral view of the mite; AD – dorsal view of prodorsal shield region; CG – coxi-genital region; L1 – leg I; L2 – leg II; Em – empodium; IG – internal genitalia.

Figure 4 Light micrographs ofDiptilomiopus mohanasundaramin. sp.: female: A – prodorsal shield design; B – coxal ornamentation; C – coxi-genital region; D – lateral view of annuli.