Nycteridocaulus guaratubensis, Hernandes, 2013

Hernandes, Fabio Akashi, 2013, Three new proctophyllodine feather mites (Acari: Proctophyllodidae) from passerines in Brazil (Aves: Passeriformes), Journal of Natural History (J. Nat. Hist.) 48 (3 - 4), pp. 185-202 : 187-191

Nycteridocaulus guaratubensis sp. nov.

( Figures 1–3 )

Type host

Phylloscartes kronei Willis and Oniki, 1992 (Rhynchocyclidae) , the Restinga Tyrannulet.

Type locality

Lagoa do Parado, Guaratuba, Paraná State, Brazil.

Type material

Male holotype ex Phylloscartes kronei, Lagoa do Parado, 25 ◦ 44 ′ 36 ′′ S, 48 ◦ 42 ′ 53 ′′ W, Guaratuba, Paraná State, Brazil, 12 January 2012, band C82764, col. F.A. Hernandes. Paratypes: 1 male and 2 females, same data as the holotype; 10 males and 6 females from “Reserva Bicudinho-do-Brejo”, 25 ◦ 45 ′ 23 ′′ S, 48 ◦ 43 ′ 37 ′′ W, Guaratuba, 13 January 2012, band C82763, col. F.A. Hernandes. Holotype male and most paratypes at DZUnesp-RC; a pair of male and female paratypes in each DZSJRP, BMOC , and ZISP.

Diagnosis

Nycteridocaulus guaratubensis sp. nov. resembles N. tyranni Atyeo 1966 by the overall shape of male opisthosoma, and can be separated on the basis of several subtle characters: in males of the new species, the small plates near setae 4a are absent (present in N. tyranni ); terminal lamellae are straight and rectangular in shape (situated obliquely on opisthosomal lobes and with rounded margins in N. tyranni ); the anterior margin of hysteronotal shield is concave (straight in N. tyranni ); seta h3 is relatively longer, 78–125 (about 50 µm in N. tyranni ); opisthoventral shields are straight, rather than directed towards adanal shields as in N. tyranni . In females, seta h2 is shorter, reaching only halfway to terminal appendages (reaches well beyond appendages in N. tyranni ); terminal cleft is relatively long and more slender than in N. tyranni (length of the terminal cleft approximately four and a half times the width at level of seta h 2 in the new species, but only about twice that width in N. tyranni ); three to four pairs of large lacunae on posterior area of anterior hysteronotal shield (those lacunae absent in N. tyranni ).

Male ( Figures 1 , 2A–D ) (holotype, measurements for five paratypes in parentheses). Idiosoma, length × width, 293 (292–303) × 144 (141–149). Prodorsal shield: anterolateral margins acute, posterior margin slightly concave, total length of shield along mid-line 88 (80–90), width 90 (90–97), surface uniformly punctate; setae ve present, represented by microsetae; scapular setae se 120 (92–123) in length, those setae separated by 54 (57–61), setae si separated by 39 (36–44) ( Figure 1A ). Humeral shields present. Setae cp situated ventrally on humeral shields. Setae c2 situated dorsally on anterolateral margins of humeral shields. Subhumeral setae c3 lanceolate, 21 (20–21) × 5 (5–6). Hysteronotal shield: greatest length 179 (183–191), width in anterior region 81 (86–89), anterior margin slightly concave, surface with small scattered lacunae. Distance between prodorsal and hysteronotal shields 26 (28–35). Opisthosomal lobes short, posterior margins rounded, terminal lamellae straight, 7 (8–9) in length, terminal cleft 19 (17–19) in length. Supranal concavity present ( Figure 1A ). Setae h3 setiform, 98 (78–125) long, setae ps2 21 (19–26) long; setae h2 148 (175–210) long; setae ps1 minute, c.3 long, situated at the same level of setae h3. Distance between dorsal setae: si: c1 56 (57–64), c1: c2 33 (34–40), c1: d1 40 (38), d1: d2 19 (25–28), d2: e1 44 (41–45), e1: h1 41 (43–47), h1: h1 42 (39–43), h3: h3 53 (49–51).

Epimerites I free, parallel ( Figure 1B ). Epimerites II with narrow sclerotized areas. Rudimentary sclerite rEpIIa present. Coxal fields I–IV open. Epimerites IVa absent. Aedeagus length (from anterior bend to apex) 19 (19), genital arch width 38 (37–39), length 9 (8–11). Genital shields absent, adanal sclerites present bearing setae ps3 and anal suckers, anterior ends of these shields with narrow projections directed to tips of genital arch. Anal suckers 14 (14–15) in diameter, corolla with indentations, distance between centres of discs 23 (21–26). Setae ps3 11 (8–11) long. Distance between ventral setae: 3a: 4a 28 (27–29), 4a: g 36 (37–40), g: ps3 24 (24–26), ps3: ps3 21 (20–21).

Femora I–II with narrow ventral crests, other segments without processes ( Figure 2A–D ). Solenidion σ 1 of genu I approximately the same length as solenidion ω3 of corresponding tarsus, situated at midlevel of segment. Genual seta cG I and II, and mG I and II, setiform ( Figure 2A, B ). Solenidia ω1 of tarsi I and II subequal in length. Legs III and IV similar in form and size. Tarsus IV 30 (30) long; setae d and e button-like ( Figure 2D ).

Female ( Figures 2E , 3 ) (range of seven paratypes). Idiosoma, length × width, 397–435 × 157–179. Prodorsal shield: 94–103 × 107–122, anterolateral margins acute, posterior margin slightly concave, surface uniformly punctate; setae ve present, represented by microsetae; scapular setae se 124–136 long, those setae separated by 68–77, si separated by 49–57. Setae cp situated ventrally on humeral shields. Setae c2 situated dorsally on anterior margins of humeral shields. Setae c3 lanceolate, 20–24 × 4–6. Distance between prodorsal and hysteronotal shields 23–37. Anterior hysteronotal shield greatest length 188–200, width at anterior margin 99–108, surface uniformly punctate ( Figure 3A ). Pair of oval pale patches between setae e1 and e2, two nearly longitudinal rows of three to four larger lacunae on posterior part of shield. Length of lobar region 90–106, greatest width 99–109. Terminal cleft inverted U-shape, 56–63 long, 17–28 wide. Setae h1 on narrow area of striated tegument between anterior hysteronotal and lobar shields. Setae h2 blade-like with terminal filament, total length 76–104 long, width of enlarged part 5–7. Setae ps1 closer to setae h3 than to h2. Setae h3 setiform, 66–72 long. Distance between dorsal setae: si: c1 62–76, c1: c2 43–50, c1: d1 43–56, d1: d2 27–39, d2: e1 46–63, e1: h1 52–74, h1: h1 28–31, h3: h3 40–58.

Epimerites I free, nearly parallel, without sclerotized areas ( Figure 3B ). Epimerites IVa present. Epigynum horseshoe-shaped, greatest width 67–77, length 45–52. Spermatheca as in Figure 2E ; copulatory opening situated terminally at terminal cleft. Pseudanal setae ps2 and ps3 setiform, seta ps2 situated at midlevel of anal opening; distances of ventral setae: 1a: 3a 52–60, 3a: g 24–33, g: 4a 63–74, 4a: ps3 75–86, ps2: ps3 18–20, ps2: ps2 44–53, ps3: ps3 20–23.

Three distal segments of legs I and II as in male; femur II with small ventral crest, femur I without crests or processes. Solenidion σ 1 of genu I about the same length as solenidion ω3 of corresponding tarsus. Genual seta cG I and II, and mG I and II, setiform. Solenidia ω1 of tarsi I and II subequal in length. Genu II, IV not modified.

Etymology

The specific name refers to the type locality.

Figures

Figure 1. Nycteridocaulus guaratubensis sp. nov., male: dorsal (A) and ventral (B) views.

Figure 2. Nycteridocaulus guaratubensis sp. nov.: male legs I–IV (A–D), female spermatheca (E), hs = head of the spermatheca, pd = primary duct, sd = secondary ducts, co = copulatory opening.

Figure 3. Nycteridocaulus guaratubensis sp. nov., female: dorsal (A) and ventral (B) views.