Neocarus coronatus Araújo & Feres, Araújo & Bichuette & Bauchan & Ochoa & Feres, 2018

Araújo, Marcel Santos De, Bichuette, Maria Elina, Bauchan, Gary R., Ochoa, Ronald & Feres, Reinaldo José Fazzio, 2018, A new species of cave dwelling Neocarus (Acari: Opilioacaridae) from Bahia state, Brazil, with remarks on taxonomic characters, Zootaxa 4402 (2), pp. 303-322: 306-308

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Neocarus coronatus Araújo & Feres

n. sp.

Neocarus coronatus Araújo & Feres   n. sp.

( FigS. 2A View FIGURE 2 – 12D View FIGURE 12 )

Material examined. Holotype ♀ (DZSJRP10707), Brazil, Bahia, São DeSidério, Gruta do Sumidouro do João Baio , S12°22’27.6” W44°53’31.7”, col. Bichuette, M.E., Gallão, J.E., Monteiro-Neto, D., 2.XI.2011, collected by hand, deposited in DZSJRP GoogleMaps   ; paratype ♂ (DZSJRP10706), same data as holotype GoogleMaps   ; paratype ♂ (DZSJRP10709), Brazil, Bahia, São DeSidério, Gruta do Catão (twilight zone), S12°22’07.0” W44°52’03.2”, col. Bichuette, M.E., Gallão, J.E., Fernandes, C.S., Pedroso, D.R., 30.X.2011, manual collection GoogleMaps   ; paratype ♂ (DZSJRP10710), paratype ♂ (DZSJRP10711), paratype ♂ (DZSJRP10712), paratype ♂ (DZSJRP10713), same data GoogleMaps   ; paratype ♀ (DZSJRP10714), Brazil, Bahia, São DeSidério, epigean habitatS cloSe to Gruta do Catão cave, S12°22’07.0” W44°52’03.2”, col. Bichuette, M.E., Gallão, J.E., Fernandes, C.S., 3.XI.2012, manual collection GoogleMaps   ; paratype ♂ (DZSJRP10715), paratype ♀ (DZSJRP10717), Same data.  

Etymology. From the Latin word “corona”, meaning crown, referring to the denSity and poSition of anterior prodorSal Shield Setae in adultS.

Diagnosis. AdultS: anterior dorSal Shield with higher Setal denSity (greater on male) than the reSt of dorSal Shield, palpal tibiotarSuS with 4 d and 22–27 (female) and 18–25 (male) ch Setae; cheliceral movable digit ventral denticle triforked. Male: anterior dorSal Shield with a prominent triangular projection. Female: ovipoSitor with 3 pairS of Smooth digitiform projectionS and 6–8 eugenital Setae.

Remarks. Opilioacaridae   genera are often identified by a combination of characterS, mainly uSing palp, pregenital and genital Setae, while the ovipoSitor Shape iS uSually conSidered a SpecieS Specific character.

Description. BaSed on female (N= 3) and male (N=7).

IDIOSOMA. Coloration dark blue with violet StripeS on both body ( Fig. 2A View FIGURE 2 ) and legS; SometimeS with a browniSh background reSulting from ingeSted food. DiStinct Segmentation; integument coniculate. DorSal idioSomal SegmentS between prodorSal Shield and preanal SegmentS without Setae, but with numerouS lyrifiSSureS arranged in tranSverSe rowS. Prodorsal shield. DorSal Shield with prominent triangular area anteriorly bearing denSe patch of 28–43 (male) or 6–7 (female) Setae ( FigS. 3A, B View FIGURE 3 ); 2 pairS of dorSolateral eyeS; 2 pairS of prodorSal lyrifiSSureS ( Fig. 3A, B View FIGURE 3 ), one cloSe to the apical part ( Fig. 7B View FIGURE 7 ) and other Smaller cloSe to firSt pair of eyeS ( Fig. 12A View FIGURE 12 ); 114–117 (female), 125–168 (male) Stout ribbed Setae ( Fig. 3A –B View FIGURE 3 , 7C View FIGURE 7 ). Preanal region. XVII dorSal Segment without Setae; ventral XVII Segment without Setae; preanal Segment with a Single dorSal Seta and one pair of lateroventral Setae. Anal valves. Each with 7–10 (female) or 7–11 (male) Stout ribbed Setae ( Fig. 5E –F View FIGURE 5 , 7E View FIGURE 7 ). Tritosternum. Each digitiform Structure with 2 pairS of Setae, 1 Small at tip and 1 long, barbed Setae poSitioned more baSally ( Fig. 9E View FIGURE 9 ). Sternal verrucae. Each with a longer ribbed tapering Seta (st1) and 2–3 acute ribbed Setae; Surrounded by a narrow lyrifiSSure. Sternal region. With a pair of ventral and lateroventral lyrifiSSureS. Female ( Fig. 5B View FIGURE 5 , 9F View FIGURE 9 ) and male ( Fig. 5A View FIGURE 5 ) st2 and st3 ribbed tapering; and 4–5 pairS of Stout ribbed Setae. Sternal region without papilliform (p) Setae. Pregenital area. Female without Setae. Male with 1–7 Stout ribbed Setae ( Fig. 10C View FIGURE 10 ). Pregenital capsules. Female with 3–4 Stout ribbed Setae and a (st5) tapering ribbed Seta; male with 2–5 Stout ribbed Setae and a (st5) tapering ribbed Seta. Genital area. Female without Setae ( Fig 5B View FIGURE 5 ). Male genital area trapezoid with 5–15 acute Smooth Setae ( Fig. 5A View FIGURE 5 , 10D View FIGURE 10 ). Ovipositor. With 6 eugenital Setae ( Fig. 5D View FIGURE 5 , 10F View FIGURE 10 ) conSiSting of tube Shape Structure; Slightly Striated; 4 pairS of digitiform Smooth projectionS ( Fig. 5D View FIGURE 5 , 10E View FIGURE 10 ); 6 Small canalS; without terminal Setae; gland-like StructureS abSent; without acceSSory glandS. Male glands. 2 pairS of glandS, one larger and one Smaller, bearing reel-like StructureS ( Fig. 5C View FIGURE 5 , 12D View FIGURE 12 ).

GNATHOSOMA. Chelicera. BaSal Segment with 1 Seta (cht 1) and denticulate paraXial Surface. FiXed digit with 3 dorSal Setae (ch 1, ch 2, ch 3); id and iα lyrifiSSureS;; well-developed hook; ogc preSent, 1 ventral denticle triforked; ( Fig. 3E –F View FIGURE 3 ). Subcapitulum. All paralabial Setae preSent ( Fig. 3C –D View FIGURE 3 , 8A View FIGURE8 ); pl1 conical, obtuSe, inSerted between cb 3 and cb 4; pl2 (With'S organ) diScoid, marginally barbed ( Fig. 8A –B View FIGURE8 ); pl3 (rutella) inSerted dorSolaterally, with diStinct row of 5 teeth; pl4 tiny, conical, inSerted dorSally near baSe of pl3; all 4 pairS of circumbuccal Setae (cb) with bifurcated tip; cb 4 equal Size of other cb Setae; female with 3 rounded tip Setae; 7–9 pairS of pointed Setae (vm, lvm, vp, lvp) and 1 ldm Seta. Male with 1 rounded tip Seta; 6–9 pairS of pointed Setae (vm, lvm, vp, lvp) and 1 ldm Seta. Lateral lipS with diStinct canalS (dl1, dl2) and their orificeS (ogl1, ogl2). Palps. Female. Trochanter with 5–7 r Setae. Femur with 13–16 r, 9–10 p Setae. Spike-like Setae abSent. Genu with 33–35 r, 3–5 p Setae. Tibia with Subequal Setae, 70 r, 3 s ( Fig. 4B View FIGURE 4 , 8F View FIGURE8 ). TarSuS ( Fig. 4A View FIGURE 4 ) with iα and iπ lyrifiSSureS, 4 foliate, Stout pointed d Setae ( Fig. 9C View FIGURE 9 ), 4 v1 ( Fig. 9B View FIGURE 9 ), 4–5 v2 ( Fig. 9D View FIGURE 9 ), 3 s, 12 sm, 22–27 ch Setae ( Fig. 9B View FIGURE 9 ); v3 abSent ( Fig. 9B View FIGURE 9 ). Apotele diStal, ventral margin Smooth ( Fig. 9D View FIGURE 9 ). Male. Trochanter with 5–7 r Setae. Femur with 12–19 r, 6–10 p Setae; Spike-like Setae abSent. Genu with 30–41 r, 2–5 p Setae. Tibia with 59–76 r Subequal length, 3 s Setae. TarSuS ( Fig. 4C View FIGURE 4 ) with ia and iπ lyrifiSSureS, 4 foliate, Stout pointed d Setae, 3 s, 4–5 v1, 4 v 2, 10–11 sm1; 18–25 ch Setae; v3, sm3 abSent. Apotele diStal and ventral margin Smooth.

LEGS. LegS thin. Papilliform Setae preSent, aS broad aS long. Legs I. Longer than otherS. Tibia I diStal long Setae abSent. BaSitarSuS I proXimal long Setae abSent. TelotarSuS with a highly modified group of dorSal diStal Setae in a depreSSion ( Fig. 6C View FIGURE 6 , 11B View FIGURE11 ); ω1 acicular, ω2 ligulate, ω3 Subulate acuminate, ω4 conical; ζ1 Small with crownlike tip inSerted cloSe to SenSilla group ( Fig. 6C View FIGURE 6 , 11D View FIGURE11 ) and a ζ2 filiform with bifid tip ( Fig. 6C View FIGURE 6 , 11E View FIGURE11 ). Legs II. AcrotarSuS II with bifid Setae longer than wide; a long Smooth dorSal Seta and ωa Solenidion ( Fig. 6D View FIGURE 6 ). Legs IV. Tibia IV without coronidia. Legs I –IV. All other leg SegmentS with 3 typeS of Setae arranged in diStal to baSal lineS: 1) tapering and barbed, 2) papilliform and 3) Smooth Setae. Legs II –IV. BaSitarSuS II –IV with coronidia; diStal Soledinion ωd, often partially Sunk. AcrotarSuS II –IV with 3 ventral Setae pairS v, 3 lateral Setae pairS l/dl, a pair of long Serrated dorSolateral Seta, a pair of diStal lightly bifid Setae lv. PretarSi II –IV with 1 pair of well-developed SeSSile clawS and 2 pairS of Setae, 1 Setal pair long and curved, other pair Smaller and apically pectinate ( Fig. 6E View FIGURE 6 , 11F View FIGURE11 ). Legs III-IV. AcrotarSi III –IV with long dorSal Serrated Setae.

Measurements. Female. Idiosoma: length 1880–2328; width at level of ocelli 445–828, palp: trochanter 107–237, femur 132–243, genu 146–242, tibiotarSuS 104–291; chelicera length: baSal Segment 219–238, fiXed digit 276–276; leg I: trochanter 474–512, baSifemur 68–116, telofemur 1153–1239, genu 952–1017, baSitibia 783– 852, telotibia 552–598, baSitarSuS 453–513, telotarSuS 428–473; leg II: trochanter 235–262, femur 678–713, genu 345–372, tibia 371–418, baSitarSuS 470–486, telotarSuS 330–382, acrotarSuS 80–102; leg III: baSitrochanter 192– 296, telotrochanter 188–317, femur 496–805, genu 331–479, tibia 377–626, baSitarSuS 414–622, telotarSuS 363– 480, acrotarSuS 81–102; leg IV: baSitrochanter 305–341, telotrochanter 294–332, femur 817–852, genu 440–524, tibia 583–642, baSitarSuS 607–645, telotarSuS 430–494, acrotarSuS 100–106. Male. Idiosoma: length 1429–2015, ocelli: width 366–401, palp: trochanter 80–258, femur 145–198, genu 129–226, tibiotarSuS 93–272; chelicera: baSal 178–230, median 202–245; leg I: trochanter 384–495, baSifemur 67–146, telofemur 978–1109, genu 795– 905, baSitibia 569–787, telotibia 520–602, baSitarSuS 419–430, telotarSuS 386–409; leg II: trochanter 184–184, femur 526–526, genu 281–281, tibia 302–302, baSitarSuS 378–378, telotarSuS 323–323, acrotarSuS 73–73; leg III: baSitrochanter 163–215, telotrochanter 124–236, femur 453–693, genu 294–345, tibia 331–568, baSitarSuS 379– 476, telotarSuS 349–456, acrotarSuS 56–78; leg IV: baSitrochanter 296–326, telotrochanter 254–359, femur 731– 880, genu 409–593, tibia 509–651, baSitarSuS 464–649, telotarSuS 409–497, acrotarSuS 70–139.