Epitrimerus edsilvai Flechtmann, 2007, n.sp.
Creators: name: Flechtmann, Carlos H. W.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Prostigmata
Eriophyidae
Epitrimerus
Epitrimerus edsilvai

description: Epitrimerus edsilvai n.sp.
(Fig. 2)
Diagnosis. Small stout scapular seta; tibia I seta (l') missing; sternal line absent; empodia 7–8-rayed; dorsoopisthosomal ridges fading equally at about seta f.
FEMALE (n = 6). Body fusiform, 172 (172–212), 67 (65–69) wide. Gnathosoma: antapical seta 10 (10– 12); basal seta 3 (3–4); chelicera 34 (32–34). Prodorsal shield 45 (45–48), 55 (54–57) wide, anterior lobe rounded, prominent, deflected, 9 (8–9), with anterior triangular extension which flaps underneath in dorsoventral mountings; frontal lobe 18 (17–19) wide at basis (see Fig. 2. FL). Rear shield margin with produced convexity into anterior middorsal area of opisthosoma, extending mesally over 5–6 dorso-opisthosomal annuli. Shield design of one pair of sinuose complete admedian lines, two pairs of incomplete, somewhat arched, submedian lines extending over anterior shield half, and one pair of almost straight, complete, submedian lines. Dorsal setiferous tubercles ahead of rear shield margin, 27 (25–27) apart; scapular seta (sc) small, stout, spinelike, 4 (4) long, probably pointing up; in dorsoventral mountings tubercles flatten out directing seta divergently backwards. Shield lines and seta covered with wax. Legs: leg I 34 (34–36); femur 9 (9–11), femoral seta (bv) 17 (13–17), set on strong tubercle; genu 4 (4–5), genual seta (l") 26 (25–27); tibia 8 (8–9), tibial seta (l') missing; tarsus 8 (7–8), doral seta (ft') 21 (21–23), lateral seta (ft") 23 (23–25), unguinal seta (u') 5 (5– 6), solenidion 7 (7–8), with slight distal enlargement; empodium 5 (5–6), 7–8-rayed. Leg II 31 (31–32); femur 9 (9–10), bv 9 (9–11); genu 4 (4–5), l" 9 (9–11); tibia 7 (7–8); tarsus 7 (6–7), ft' 7 (6–7), ft" 23 (18–24), u' 4 (4–5), solenidion 8 (8), slightly knobbed; empodium 6 (6–7), 7–8-rayed. Coxigenital area: anterior coxae broadly fused medially without indication of a prosternal apodeme; with short lines in area between coxal setae I and II. First setiferous coxal tubercles prominent, farther apart than second and way ahead than anterior coxal approximation. Remaining coxal areas smooth. Coxal setae I (1b) 11 (10–12), 12 (12–15) apart; coxal setae II (1a) 17 (16–20), 9 (8–9) apart; coxal setae II (2a) 46 (43–49) apart. Prosternal apodeme absent. Coxisternal region with 5 (6–7) annuli, faintly microtuberculate. Genitalia 26 (25–28) wide, 17 (17–19) long; genital seta (3a) 61 (56–64). Epigynum basally with 4 (4) transverse lines, distally with 12 (10–14) longitudinal ribs. Opisthosoma with three dorsal ridges that fade out equally at about seta f. Lateral seta (c2) 20 (18– 22), on annulus 3 (3–4) from genitalia rear margin; ventral seta I (d) 63 (61–66), 36 (35–38) apart, on annulus 19 (19–21); ventral seta II (e) 51 (48–51), 17 (17–19) apart, on annulus 41 (41–46); ventral seta III (f) 36 (36– 38), 29 (25–31) apart, on annulus 62 (62–70) or 10 (9–10)th from rear. Total dorsal annuli 54 (51–56), laterally with wax bearing structures (faint microtubercles or pores?); total ventral annuli 71 (71–78), microtuberculate. Caudal seta (h1) 96 (93–123); accessory seta (h1) missing.
MALE (n = 3). Slightly smaller than female, 172–186, 60–61 wide. Gnathosoma: apical seta 8–11; basal seta 3–4; chelicera 26–31. Prodorsal shield 51–60 wide, 43–44 long, sc 3, 24–26 apart. Legs: leg I 32 –33; femur 9, bv 10–11; genu 4–5, l" 25–27; tibia 9, l' missing; tarsus 6–7, ft' 19–20, ft" 23–24, u' 4–5, solenidion 7–8, empodium 6–7, 8-rayed. Leg II 29; femur 9, bv 8–11; genu 3–4, l" 8–9; tibia 7–8; tarsus 8, ft' 6–7, ft" 21– 22, u' 4–5, solenidion 7–8, empodium 6, 7-rayed. Coxigenital area: 1b 9–11, 12–18 apart; 1a 15–19, 8 apart; 2a 46, 24–26 apart; coxisternal region with 6 annuli. Genitalia 22–24 wide, 15–19 long; 3a 51–53. Opisthosoma: c 2 16–18, on annulus 2; d 63–64, 33–35 apart, on annulus 15–16; e 48–49, 16–17 apart, on annulus 37– 38; f 39–40, 25–26 apart, on annulus 59–63 or 10th from rear. Total dorsal annuli 49–52; total ventral annuli 68–71; h2 121–125, h1 missing.
Type material. Holotype female, 22 female, 11 male paratypes, from "canelinha", Nectandra megapotamica (Spreng.) Mez., Lauraceae, an ornamental tree used on street arborization, Piracicaba, Sao Paulo, Brazil, ca. 800 m west of 22o 42' 30" S, 47o 38' 00" W, 1 November 2004, coll. E. S. Silva, on eight microscopic preparations.
Relation to host. Underside leaf vagrant.
Etymology. I take pleasure in dedicating this species to Mr. Edmilson Santos Silva, who detected, collected and submitted infested plant material, therefore the specific designation edsilvai.
Remarks. E. edsilvai is, so far, the only species in the genus with a bare tibia I, that is, with l' missing; and, the third species with a 7–8-rayed empodium (7-rayed in E. rainieriellus Keifer, 1971 and E. yunbimus Huang 1996 [in: Huang and Boczek, 1996]. Huang (2001) erected the genus Spatha having Epitrimerus yubimus [sic] Huang as the type species, but Amrine et al. (2003) synonymyzed Spatha under Epitrimerus.
description: Published as part of Flechtmann, Carlos H. W., 2007, Two new taxa in the Eriophyidae (Acari, Prostigmata) from the Brazilian fauna, pp. 29-33 in Zootaxa 1425 on pages 31-33, DOI: 10.5281/zenodo.175731