Cosella macrothrix, Flechtmann, Carlos H. W., 2004

Flechtmann, Carlos H. W., 2004, New genus and seven new species of Brazilian eriophyoid mites and redescription of Catachela machaerii Keifer (Acari: Prostigmata: Eriophyoidea), Zootaxa 611, pp. 1-20 : 13-15

Cosella macrothrix n.sp. ( Fig. 6 )

DIAGNOSIS — Empodium 4­rayed; femoral seta (bv) on leg II more than twice as long as segment; tarsal I dorsal and lateral seta (ft', ft") subequal in length.

FEMALE (n = 6) — Body fusiform, 153 (143–172), 66 (61–66) wide. Gnathosoma projecting down; antapical seta 5 (5–7); basal seta 3 (2–3); chelicera 18 (17–18). Prodorsal shield design a complex network; median and admedian lines complete, slightly sinuose, three transverse lines and several longitudinal lines forming a pattern of symmetric geometric figures ( Fig. 6 D); laterally with many short dashes. Setiferous tubercles ahead of rear shield margin, plicate, 22 (18–24) apart, directing scapular seta (sc) upwards; sc 7 (7–8). Legs: leg I 23 (22–24); femur 9 (8–9), femoral seta (bv) 8 (7–9); genu 4 (4), genual seta (l") 25 (23–25); tibia missing; tarsus 8 (7–9), dorsal and lateral setae subequal in length, dorsal seta (ft') 17 (17–19), lateral seta (ft") 18 (18–22), unguinal seta (u') geniculate in some specimens, 5 (5–7), solenidion somewhat displaced axially, 5 (5–7), empodium 6 (6–7), 4­rayed. Leg II 21 (20–23); femur 9 (7–9), bv 18 (15–19), genu 3 (3–4), l" 9 (8–10); tibia missing; tarsus 7 (7–8), ft' 7 (5–7), ft" 19 (19–22), u' 5 (5–6), solenidion in usual dorsal position, 10 (8–10), empodium 5 (5–6), 4­rayed. Coxigenital area: coxae I fused medially with no indication of a sternal line and fused with hypostome, with numerous granules; coxae II with granules surrounding setal basis. Coxal seta I (1b) missing; coxal seta II (1a) 17 (13–17), 9 (9–11) apart; coxal seta III (2a) 20 (20–38), 23 (22–26) apart. Coxigenital area with three annuli, smooth. Genitalia 24 (23–24) wide, 11 (11–16) long. Genital seta (3a) 11 (8–11). Epigynum granulated. Opisthosoma: annuli subequal dorsoventrally; microtubercles present only laterally on dorsal annuli and a few caudal annuli entirely with reduced microtubercles. Ventrally microtubercles absent on an Ushaped area extending from opisthosomal seta I (d) to seta II (e). Lateral seta (c2) 30 (28– 33), on annulus 1 (1–2) from genitalia rear margin; ventral seta I (d) 51 (49–61), 32 (31– 37) apart, on annulus 11 (9–12); ventral seta II (e) 10 (8–11), 14 (14–18) apart, on annulus 23 (21–24); ventral seta III (f) 18 (17–20), 18 (18–19) apart, on annulus 41 (35–41) or 8 (7–8) th from rear. Total ventral annuli 48 (40–48); total dorsal annuli 54 (49–56). Caudal seta (h2) 57 (57–62); accessory seta (h1) minute.

MALE (n = 3) — Smaller than female, 139–154, 55–65 wide. Gnathosoma: antapical seta 5–6; basal seta 4; chelicera 15–16. Prodorsal shield 36–39, 56–60 wide; sc 6–7, 18–19 apart. Legs: leg I 19–23; femur 6–8, bv 5–8; genu 3, l" 23–25; tibia missing; tarsus 7, ft' 17–18, ft " 18–19, u' 6, solenidion 5, empodium 5, 4–rayed. Leg II 19–20; femur 7–8, bv 12–14; genu 3–4, l" 7–8; tibia missing; tarsus 6–7, ft' 6–7, ft" 16–20, u' 5–6, solenidion 8–9, empodium 6–8, 4­rayed. Coxigenital area: 1b missing; 1a 10–11, 9–10 apart; 2a 18– 19, 23–24 apart. Coxigenital area with 3 annuli, smooth. Genitalia: 21–23 wide, 13–16 long, densily granulate; 3a 7. Opisthosoma: annuli subequal dorsoventrally, microtubercles as in female. Lateral seta (c2) 20–23, on annulus 2 from genitalia rear margin. Ventral setae: d 48–50, 22–31 apart, on annulus 8–9; e 9–11, 18 apart, on annulus 18–21; f 17–19, 18 apart, on annulus 34–37 or 7–8th from rear. Total ventral annuli 40–44; total dorsal annuli 46–50; h2 46–57; h1 minute.

TYPE MATERIAL — Holotype female, 37 female and 16 male paratypes from Ficus pumila L. ( Moraceae ), Campus "Luiz de Queiroz", Piracicaba, São Paulo, Brazil (22° 42' 30" S, 47° 38' 00" W), coll. Nora Cristina Mesa and C.H.W. Flechtmann , 1 Oct. 2003, on 11 microscopic preparations.

RELATION TO HOST PLANT — vagrant on both sides of leaves.

ETYMOLOGY — The specific designation macrothrix is derived from the Greek makro, long, plus the Greek thrix, hair, seta and refers to the long femur II seta.

REMARKS — Cosella macrothrix n.sp. is close to C. ceratopudenda Flechtmann, 2002 (in: Flechtmann & Moraes, 2002) in the complexity of the prodorsal shield design, but has a much shorter scapular seta (sc extending over 2–4 dorsal opisthosomal annuli in C. ceratopudenda ; reaching only half the distance to rear shield margin when folded backwards in C. macrothrix ); and presents femur II seta at least twice as long as the segment (not more than equal in length to femur length in C. ceratopudenda ); tarsal I dorsal and sublateral setae subequal in length (lateral seta much longer than dorsal seta in the other species of Cosella ).

ventral aspect of female.

Figures

FIGURE 6. Cosella macrothrix n. sp. AL, anterolateral aspect of female; D, dorsal aspect of female; E, empodium (enlarged); GM, male genitalia L 1, leg I (enlarged); L 2, leg II (enlarged); V,