Propeaciota genusetosis, Chakrabarti, Samiran, Sur, Surajit, Roy, Sourav & Sarkar, Sanjay, 2017

Chakrabarti, Samiran, Sur, Surajit, Roy, Sourav & Sarkar, Sanjay, 2017, Two new genera and two new species of eriophyoid mites (Acari: Eriophyoidea) from North Bengal, India, Zootaxa 4236 (1), pp. 172-182 : 175-176

Propeaciota genusetosis n. sp.

( Figs. 1–13 )

Diagnosis. Distinct 1lateral and broad medio-longitudinal shallow trough flanked by furrows on either side till end of dorsal opisthosoma, admedian lines on prodorsal shield distantly apart and epigynum with 7 longitudinal scorings, each dorsal annulus laterally meeting almost 4 ventral annuli.

FEMALE (holotype): Body fusiform, white, 135 (135–165 in 13 paratypes) long, 59 (54–59) wide. Gnathosoma 18 (17–20) long, almost straight with pedipalp coxal seta 4 (4–5) long. Prodorsal shield 44 (38–44) long, 63 (48–63) wide, almost triangular with anterior acute lobe; admedian lines 28 (25–28) apart, sinuate, reaching base of dorsal tubercles and effaced anteriorly, median and submedian lines not discernible; dorsal tubercles on rear shield margin, 3 long and 25 (25–28) apart, scapular seta sc 4 (4–5) and directed posteriorly. Leg I from base of trochanter 26 (26–32); femur 11 (11–17), basiventral femoral seta bv 6 (6–8); genu 4 (4–7), antaxial genual seta lʺ 17 (12–18); tibia 6 (4–6) without seta; tarsus 5 (4–5); paraxial fastigial tarsal seta ftʹ 17 (14–17), antaxial fastigial tarsal seta ftʺ 16 (13–16); tarsal solenidion ω curved, knobbed, 6 (6–10); tarsal empodium em 5 (3–6), 4-rayed. Leg II from base of trochanter 26 (26–32); femur 11 (11–16), basiventral femoral seta bv 7 (4–7), genu 5 (5–8), antaxial genual seta lʺ 4 (4–10); tibia 5 (3–5) without paraxial tibial seta lʹ; tarsus 5 (4–7), paraxial fastigial tarsal seta ftʹ 17 (15–18), antaxial fastigial tarsal seta ftʺ 4 (3–5), paraxial unguinal tarsal seta uʹ absent, tarsal solenidion ω curved, knobbed 5 (4–6); tarsal empodium em 5 (4–5) with stout base and 4-rayed. Coxae I 14 (10–14), connate with sternal line, base of coxae I with few granules, 1b tubercles and setae present, setae 1b 5 (5– 7) and 9 (9–10) apart, 1a tubercles with setae present, setae 1a 15 (11–15) and 6 (5–7) apart, distance between setae 1a and 1b 8 (8–9); coxae II 14 (12–15) and separated from setae 2a 26 (19–26) and 20 (18–20) apart. Opisthosoma with 1 lateral ridge on either side and broad medio-longitudinal shallow trough flanked by 1 deeper furrow on either side and extending almost up to end of opisthosoma, with 20 (19–20) dorsal annuli and 49 (49–51) ventral annuli, each dorsal annulus either flat or little depressed dorsally and with elongated wax secreting glands, without microtubercles or striations on dorsal surface; ventral annuli with small striations; seta c2 18 (12–18) and present on annulus 7 (7–8), seta d 19 (13–19) on annulus 16 (16–17), seta e 7 (5–7) on ventral annulus 26 (24–26), seta f 19 (19–21) on ventral annulus 43 (42–44), seta h1 absent and seta h2 30 (28–33). Epigynium elliptical, 12 (10–14) long, 21 (21–24) wide, with 7 longitudinal scorings, seta 3a 8 (8–9), 2–3 oblique lines on upper half of epigynium; 5 ventral annuli present between coxae II and epigynium. Internal genitalia with anterior apodeme curved downward.

MALE: Not found.

Type material. Holotype: Female (marked) on slide (no.1805/55/2015), INDIA: West Bengal, Darjeeling, Rishop , 27˚09’N, 88˚58’E, altitude 2591m. 18 October 2015 from Acer sp. ( Aceraceae ), coll. S. Chakrabarti . Paratypes: 13 females on 4 slides (nos. 1806–1809 /55/2015); collection data same as in holotype.

Relation to host. This white and fusiform mite occurs on under surface of leaf as leaf vagrant.

Etymology. The specific epithet is neuter gender and is derived from Latin word genu (knee, part of the leg) + seta (bristle) used here as an objective (sis) referring to its presence on genu of leg II.

Differential diagnosis. This new species differs from Propeaciota secundum ( Flechtmann et al., 1995) in having one lateral ridge and shape of the median part of the opisthosoma, admedian lines situated laterally apart, dorsal tubercles and scapular setae directed posteriorly, coxae with granulations at their bases. But in the case of P. secundum the following characters are found: two lateral ridges on each side, dorsum of the opisthosoma flat or little elevated, paired admedian lines on rear two third of the shield, dorsal tubercles and scapular setae laterally divergent, outwardly directed and coxae smooth.

Figures

FIGURE 1 – 5. Propeaciota genusetosis n. sp., female: 1. Dorsal view of body; 2. Ventral view of body. 3. Dosal and ventral annuli; 4. Empodium; 5. Internal genitalia.

FIGURE 6 – 9. Propeaciota genusetosis n. sp., female: 6. Prodorsal shield; 7. Coxal – genital region; 8. Dorsal opisthosoma with ridges; 9. Caudal region.

FIGURE 10 – 13. Propeaciota genusetosis n. sp., female: 10. Genu II setae; 11. Opisthosomal setae d, e and f; 12. Dorsal opisthosoma with ridges and troughs; 13. Empodium.