Pterodectes fissuratus Hernandes & Valim

Hernandes, Fábio A. & Valim, Michel P., 2005, A new species of Pterodectes Robin, 1877 (Proctophyllodidae: Pterodectinae) from the pale­breasted thrush, Turdus leucomelas (Passeriformes: Turdidae), Zootaxa 1081, pp. 61-68 : 62-66

Pterodectes fissuratus Hernandes & Valim sp. n. ( Figs. 1–12 )

TYPE MATERIAL: 1 male holotype, 3 male and 3 female paratypes, collected from Turdus leucomelas Veillot, 1818 ( Passeriformes , Turdidae ), Parque Estadual Vila Rica do Espirito Santo, Fenix, Parana, Brazil (23 S 55’–51 W 57’), 30.III.2003, coll. A. Bispo.

Holotype male and paratypes (2 male and 2 females) are deposited at DZSJRP (slides 6193 to 6197), paratype male and female are deposited at USDA.

Male holotype ( Figs. 1, 2 , 5 , 8–11 ). (range of 2 paratypes indicated in parenthesis). Length of idiosoma 363 (341–374), width 154 (165). Prodorsal shield: 122 (117–119) in length along median line, 114 (114) in width at posterior margin, posterior half with deep median suture, posterior two thirds of shield surface with numerous lacunae of irregular shape. Scapular setae si and se arranged in a transverse line. Scapular setae se 119 in length (125–127) and separated by 68 (62); si separated by 53 (41–53). Setae c2 on striated tegument, setae c3 lanceolate, 30 in length and 8 in width (24–30 x 8). Hysteronotal shield: greatest length 253 (250–252), width at level of setae cp 109 (111); surface of the shield with median longitudinal suture running from anterior margin to terminal cleft and with numerous lacunae of irregular shape, except for lobar area. Terminal cleft V­shaped, with rounded anterior end, 35 (33–38) from anterior end to lobar apices. Setae h3 relatively short, without terminal filament, separated by 61 (49–63). Length of setae: ps1 11 (8–11), h3 35 (41), h2 185 (190–207), ps2 98 (95–106), f2 8 (8), ps3 38 (41–46). Distance between dorsal setae: si–c1 76 (60–76), c1–c2 52 (44–52), c1–d1 64 (60–71), d1–d2 38 (38–41), d1– e1 79 (73–82), d2– e1 50 (49–53), e1– e2 50 (48–50), e1–h1 73 (61–73), e2–h1 39 (29–39), h1–f2 24 (23–24).

Epimerites I fused as a narrow U, coxal fields I, II and III not closed. Aedeagus reaches the level of adanal discs ( Fig. 5 ), 84 in length (80–82); genital arch 43 in width (41–46). Distance between ventral setae: 3a–4a 41 (41–43), 4a–g (35–38), g–ps3 68 (68–71), ps3–ps3 73 (73–79), ps3–h3 37 (35–38). Adanal discs 14 (14–15) in diameter, and separated by 41 (41) [distance between centres of discs]. Solenidion —1 of genu I as thin spine ( Fig.8 ), seta cG of genua I, II setiform; genua III, IV with short and rounded ventral apophysis ( Fig.9 ). Tarsus IV 58 in length, seta e stick­like, seta f setiform, only insertion of seta d present ( Fig.10 ).

Female ( Figs. 3, 4 , 6, 7 and 12 ). (measurements of 3 paratypes). Length of idiosoma excluding terminal appendages 506–539, width 176–187. Prodorsal shield: 132–133 in length along median line, 133–140 in width at posterior margin, median suture runs three quarters of shield length, posterior 2/3–3/4 of shield with numerous lacunae of irregular form. Scapular setae si and se arranged in a transverse line. Setae se 125–141 in length and separated by 76–79; pair si separated by 53–58. Setae c2 on striated tegument; setae c3 lanceolate, 20–33 in length and 7–8 in width. Anterior hysteronotal shield: greatest length 258–277, width at level of setae cp 133–139; surface with lacunae of irregular shape and with median furrow running entire length of the shield; posterior end of this furrow bifurcate as an inverted Y ( Fig. 12 ). Length of lobar region excluding terminal appendages 103–109, greatest width 84–87. Setae h2 thickened, with short terminal filament, 98–120 in length, 7 in width. Setae h1 inserted on anterior third of lobar shield. Distance between dorsal setae: si–c1 75–88, c1–c2 49–57, c1–d1 71–76, d1–d2 41–48, d1–e1 105–113, d2– e1 68–76, e1– e2 54–62, e1–h 1 31–34, e2–h1 46–52, h1–f 2 31–34, f2–h 2 14–19.

Epimerites I fused as a narrow U, coxal fields I, II and III not closed. Setae ps2 and ps3 button­like. Spermatheca and spermaducts as in Fig. 7 .

ETYMOLOGY: the specific designation refers to the longitudinal furrow on dorsal shields.

Differential diagnosis. The new species resembles P. bilineatus Berla, 1958 in having a longitudinal median suture on the hysteronotal shield. However, in P. fissuratus , the suture on dorsal surface of the body also spreads onto the posterior half of the prodorsal shield in the male and runs through almost the entire length of the prodorsal shield in the female ( Figs. 1 , 3 ). Prodorsal and hysteronotal shields in both sexes have numerous wellpronounced lacunae of irregular shape, which somewhat resemble those of Montesauria pardalis (Gaud & Mouchet, 1957) . Seta cG of genua I and II are normal, setiform (greatly thickened, blade­like in P. bilineatus ). The aedeagus in P. fissuratus is shorter and reaches only the level of adanal discs ( Fig.5 ). The epimerites I of male are fused as a narrow U and are not connected with epimerites II, differently from P. bilineatus , which has a narrow V connected with epimerites II by a transverse bar. The new species was collected from Turdus leucomelas , Turdidae , whereas P. bilineatus was collected from Cariothraustes canadensis (Linnaeus, 1966.), Cardinalidae .

Figures

FIGURES 1 – 2. Pterodectes fissuratus n. sp. Male: dorsal (1) and ventral (2) views. Scale in µm.

FIGURES 3 – 4. Pterodectes fissuratus n. sp. Female: dorsal (3) and ventral (4) views. Scale in µm.

FIGURES 5 – 7. Pterodectes fissuratus n. sp. Genital region of male (5) and female (6). Fig. 7. Female spermatheca: hs—head of spermatheca; pd—primary spermaduct; sd—secondary spermaducts. Scales in µm.

FIGURES 8 – 10. Pterodectes fissuratus n. sp. Male legs: 8. Genu and tibia I. 9. Genu and tibia IV. 10. Tarsus IV. Scales in µm.

FIGURES 11 – 12. Pterodectes fissuratus n. sp. lobar region of male (11) and female (12). Scales in µm.