Cothrix erugata, Reis & Gondim & Navia & Flechtmann, 2011

Reis, Aleuny C., Gondim, Manoel G. C., Navia, Denise & Flechtmann, Carlos H. W., 2011, New eriophyoid mites (Acari: Prostigmata: Eriophyoidea) from banana and heliconia in Northeastern Brazil — two new genera and three new species, Zootaxa 3042, pp. 15-26 : 17-19

Cothrix erugata n. gen. et n. sp. Reis & Navia

( Figs. 1 & 2 )

FEMALE (n=10). Body fusiform, 197 (174–197), 69 (63–78) wide; yellowish in life. Gnathosoma downcurved, 19 (18–20); basal seta (ep) 4 (3–4); antapical seta (d) moderately long and bifurcate 11 (11–12); chelicerae 10 (10– 12). Prodorsal shield 55 (48–55), 60 (53–63) wide, subtriangular; median line extending over 1/3 anterior shield; admedian lines on the 3/4 anterior shield, sinuous, subparallel; submarginal lines parallel to the antero lateral shield margin, curved inwards latero-posteriorly; a concave, transversal line or ridge crossing over 1/4 anterior of prodorsal shield, subparallel to submarginal line. Frontal lobe broad-based, anteriorly rounded. Scapular seta (sc) 5 (5–6), on prominent, transversal tubercles placed ahead of rear prodorsal shield margin and directed upwards, 25 (22–28) apart. Legs with all usual segments; all normal setae present except for tibial seta (l') on leg II. Leg I 30 (28–30); femur 8 (8–9), femoral seta (bv) 9 (7–9); genu 5 (5), genual seta (l") 21 (18–21); tibia 8 (7–8), tibial seta (l') 3 (2–3); tarsus 5 (4–5), lateral seta (ft") 17 (16–17), dorsal seta (ft') 16 (15–17), unguinal seta (u') 4 (4), solenidion (ω) 5 (5), empodium 5 (4–5), 3-rayed, apically bifurcate. Leg II 30 (27–30); femur 8 (8), bv 7 (7); genu 5 (4–5), l" 6 (6–8); tibia 7 (6–7); tarsus 5 (5), ft" 15 (15–16), ft' 4 (3–4), u' 3 (3–4), ω 5 (4–5); empodium 5 (4– 5), 3-rayed, apically bifurcate. Coxae I and II finely granulated. Sternal line 9 (8-10). Coxal seta I (1b) absent; coxal seta II (1a) 10 (9–10), 7 (6–7) apart; coxal seta III (2a) 20 (20–26), 26 (21–26) apart; coxigenital annuli not discernible. Genitalia 14 (14–17), 21 (20–21) wide, coverflap basally with short, irregular dashes and granules, distally with longitudinal broken lines; genital seta (3a) 11 (11). Opisthosoma 31 (30–31) dorsal annuli with a longitudinal middorsal and two lateral ridges extending until level of ventral seta III (f); microtubercles on dorsal annuli elongated, largely restricted to median region, more numerous on first 5 or 6 annuli and gradually decreasing in number along ridge with last 5 annuli (telesoma) completely microtuberculated; 61 (54–61) ventral annuli finely microtuberculated; microtubercles slightly elongated. Presence of loosely arranged microtubercles on area between anterior dorsal and ventral annuli. Lateral seta (c2) 8 (8–10), on annulus 2 (1–3). Ventral seta I (d) 17 (56– 60), on annulus 15 (13–15), 33 (26–33) apart, 28 (24–29) microtubercles apart; ventral seta II (e) 8 (8–11), on annulus 34 (29–34), 14 (10–14) apart, 11 (9–15) microtubercles apart; ventral seta III (f) 18 (16–18), on annulus 56 (49–56), 18 (18–23) apart, 27 (20–28) microtubercles apart. Caudal seta (h2) 31 (30–31); accessory seta (h1) absent. MALE (n=5). Smaller than female, 162–172, 59–66 wide. Gnathosoma 18–20; basal seta (ep) 3; antapical seta (d) moderately long and bifurcate 11–13; chelicerae 10–11. Prodorsal shield as in female, 45–50, 55–60 wide. Scapular seta (sc) 4–5, 22–26 apart. Legs as in female. Leg I 28–30; femur 8–9, femoral seta (bv) 7–8; genu 5, genual seta (l") 18–19; tibia 8, tibial seta (l') 2–3; tarsus 4–5, lateral seta (ft") 15–16, dorsal seta (ft') 14–15, unguinal seta (u') 4, solenidion (ω) 5; empodium 4–5, 3-rayed. Leg II 27–29; femur 8, bv 7–8; genu 4–5, l" 5–7; tibia 7; tarsus 4–5, ft" 13–14, ft' 4–5, u' 3–4, ω 4–5; empodium 4–5, 3-rayed. Coxae apparently smooth. Sternal line 9–10. Coxal seta I (1b) absent; coxal seta II (1a) 10–12, 5-8 apart; coxal seta III (2a) 23–25, 18–20 apart, 4 coxigenital annuli, without microtubercles. Genitalia 11–13, 13–14 wide, posterior region without granules, eugential seta as figured; genital seta (3a) 7–8. Opisthosoma as in female, 27–29 dorsal annuli; 51–55 ventral annuli. Lateral seta (c2) 9–11, on annulus 2. Ventral seta I (d) 18, on annulus 12–13, 21–24 apart, 17–23 microtubercles apart; ventral seta II (e) 10–11, on annulus 26–28, 9–10 apart, 10–14 microtubercles apart; ventral seta III (f) 14–16, on annulus 48–50, 19–21 apart, 18–23 microtubercles apart. Caudal seta (h2) 37; accessory seta (h1) absent.

Type material. Holotype, 40 female and 16 male paratypes, collected from Heliconia stricta Huber (Heliconiaceae) , Recife, Pernambuco, Brazil. 08°01'07"S, 34°56'41"W, 2 February 2009, coll. A.C. Reis, on 12 microscope slides. Holotype and paratypes (40 specimens: 31 females and 9 males, on 9 microscope slides) deposited in the collection of the Departamento de Agronomia, Entomologia Agrícola, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil. Paratypes (16 specimens: 9 females and 7 males, on 3 microscope slides) deposited in the collection of the Laboratório de Quarentena Vegetal, Embrapa Recursos Genéticos e Biotecnologia, Brasília, DF, Brazil.

Relation to host. A vagrant on the lower leaf surface. No damage symptoms were present.

Etymology. The specific designation, erugata , is derived from the Latin erugo, erugatus, meaning clear of wrinkles, smooth and refers to the absence of annuli in the coxigenital region of the female.

Figures

FIGURE 1. Cothrix erugata n. gen., n. sp. CGM. Coxigenital region, male; D. Dorsal habitus, female; em. Empodium, leg I, female; IG. Internal genital structures, female; LM. Lateral habitus, female; LO. Lateral opisthosomal view of anterior section of mite; L 1. Leg I, female; L 2. Leg II, female; V. Ventral habitus, female.

FIGURE 2. Cothrix erugata n. gen., n. sp. A. Dorsal habitus, female; B. Ventral habitus, female; C. Dorsal view of legs I and leg II, female; D. Ventral view of legs I and leg II, female; E. Detail of antapical seta (d) moderately long and bifurcate, female; F. Genitalia, male; G. Epigynum; H. Prodorsal shield, female.