Cosella macrothrix Flechtmann, 2004, n.sp.
Creators: name: Flechtmann, Carlos H. W.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Eriophyidae
Cosella
Cosella macrothrix

description: 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.
description: Published as part of Flechtmann, Carlos H. W., 2004, New genus and seven new species of Brazilian eriophyoid mites and redescription of Catachela machaerii Keifer (Acari: Prostigmata: Eriophyoidea), pp. 1-20 in Zootaxa 611 on pages 13-15, DOI: 10.5281/zenodo.158438