Neocarus paraplatensis Araujo 2023, n. sp.
Creators: name: Araújo, Marcel Santos De
name: Palma, Antonella Di
name: Feres, Reinaldo José Fazzio
name: Penteado-Dias, Angelica Maria
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opilioacarida
Opilioacaridae
Neocarus
Neocarus paraplatensis

description: Neocarus paraplatensis Araújo n. sp.
(Figures 6–10)
Material examined. Holotype F (UNINA), URUGUAY, Salto, coll. F. Silvestri, ex. under stones, MAY.1899. From original syntype material of N. platensis. There is no information about the coordinates or specific location.
Paratypes. Same data as for the holotype: 6 M (UNINA).
Etymology. From the Greek word para, meaning “side by side” + platensis, the original species that contained the type series.
Diagnosis. Male pregenital area with 4–6 stout ribbed setae, genital area with 5–7 acute smooth setae. Female pregenital and genital area with no setae. Ovipositor with 13 smooth eugenital setae, 8 digitiform projections with bifid tip, and rugose basilateral patch [internal papillate hooks] at each side. Male palp tarsus with 17–20 ch and female with 20 ch setae. Adults palp genus with 0–6 p setae, palp tarsus with 5–6 d setae with four rounded lobes.
Description
Based on female (N = 1) and male (N = 6).
IDIOSOMA. Distinct segmentation; integument coniculate; dorsal segments between prodorsal shield and preanal segments without setae, but with numerous lyrifissures arranged in transverse rows; with four pairs of dorsal stigmata without peritremes; ventral suckers absent; posterior border without elongated setae; anus positioned terminally. Prodorsal shield (Figures 6A, 9A). With rounded area anteriorly; without dense patch; with 2 pairs of dorsolateral eyes; 2 pairs of lyrifissures, one close to apical part and other smaller close to first pair of eyes; female with 143 and male with 137 stout ribbed setae. Preanal region (Figures 6B, 9E). Segment XVI without setae; preanal segment XVII with a single dorsal and a pair of lateroventral stout ribbed setae. Anal valves. Each with 12–13 (female) and 10–13 (male) stout ribbed setae. Tritosternum. Each digitiform structure with 2 pairs of setae, 1 small at tip and 1 long, barbed positioned more basally. Sternitogenital area (Figures 6C–D, 9C). Sternal verrucae. In both adults, each with a longer ribbed smooth tapering seta (st1), female with 2–4 and male with 2 ribbed acute setae. Sternal region. Adults with a pair of ventral and lateroventral lyrifissures, s t2 and st3 ribbed tapering, female with 7–8 pairs and male with 4–8 pairs of stout ribbed setae. Sternal region without p setae. Pregenital area. Female without setae. Male with 4–6 stout ribbed setae. Each pregenital capsules in both adults with a ribbed, smooth, tapering setae (st5); female with 6 and male with 4–6 stout ribbed setae. Genital area. Without setae, but with 13 smooth eugenital setae. Male genital area trapezoid and with 5–7 acute smooth setae. Ovipositor (Figures 6D, 8A–C). Consisting of a tube-shaped structure, slightly striated with 4 pairs of smooth forked digitiform projections and a rugose basolateral patch (Figures 6D, 8A–C) without terminal setae; gland-like structures or accessory glands. Male glands. 2 pairs of glands, one larger and one smaller, without reel-like structures.
GNATHOSOMA. Chelicera (Figure 9B). Male presenting chelicera basal segment with 1 seta (cht 1) (female chelicera was lost); normal size; and denticulate paraxial surface; fixed digit with 3 dorsal setae (ch 1, ch 2, ch 3) and id and iα lyrifissures; well-developed hook; movable digit with 1 ventral denticle; lateral denticle absent; ogc present. Subcapitulum (Figures 7A, 9D). Paralabial setae present; pl1 conical, obtuse, inserted between cb 2 and cb 3; pl2 (With’s organ); discoid, marginally barbed; 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 bifurcate tips; cb 4 equal size of other cb setae; lateral lips with distinct canals (dl1, dl2) and their orifices (ogl1, ogl2). Female with 3 rounded tip setae; 7–8 pairs of pointed setae (vm, lvm, vp, lvp) and 1 ldm seta. Palps (Figures 7B–C, 8D, 10). Female. Trochanter with 4 r setae. Femur with 13 r; 5–13 p setae; spike-like setae absent. Genu with 38 r; 7 p setae. Tibia with subequal setae; 65 r; 3 s setae. Tarsus with iα and iπ lyrifissures; 5–6 d1 foliate stout pointed setae; 4 v1, 4 v2; v3 absent; 3 s; 11 sm1; 20 ch setae. Tarsus apotele distal; ventral margin smooth. Male. Trochanter with 3–4 r setae. Femur with 7–13 r; 5–13 p setae; spike-like setae absent. Genu with 24–38 r; 1–7 p setae. Tibia with 45–65 r; subequal length; 3 s setae; tarsus with ia and iπ lyrifissures; 5–6 d1; 3 s; 2–4 v1, 4–6 v2; v3 absent; 9–11 sm1; sm3 absent; 17–20 ch setae; apotele distal; ventral margin smooth.
LEGS. Papilliform setae longer than broad. Legs I–IV thin. Legs I. Legs I longer than others; tibia I distal long setae absent; basitarsus I proximal long setae absent; telotarsus I with a highly modified group of dorsal distal setae in a depression; ω1 conical, ω2 ligulate, ω3 subulate acuminate, ω4 acicular; ζ1 small with crown-like tip inserted close to sensilla group and a ζ2 filiform with bifid tip. Legs II. Acrotarsus II with a bifid seta longer than wide. And a smooth dorsal seta and ωa solenidion. 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. Femora II–IV without ventral trichobothria. Genua and tibiae II–IV without coronidia. Basitarsi II–IV with coronidia. Acrotarsi II–IV with 3 ventral setae pairs v; 3 lateral setae pairs l/dl; a pair of long serrated dorsolateral setae; and a pair of distal bifid setae lv; lightly bifid. 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; ambulacrum rounded and smooth; with a pair of well-developed sessile claws. Legs III–IV. Acrotarsi III–IV with a long dorsal serrated seta.
Measurements. Female. Idiosoma: length 2283–2283; width at level of ocelli 355–355, palp: trochanter 121– 121, femur 233–233, genu 198–198, tibiotarsus 284–284. Male. Idiosoma: length 1755–2301, width at level of ocelli 303–403; palp: trochanter 83–121, femur 181–233, genu 120–172, tibiotarsus 246–329; chelicera length: basal segment 169–353, fixed digit 266–448; leg I: trochanter 438–443, basifemur 83–83, telofemur 883–916, genu 605–605, basitibia 444–575, telotibia 475–491, basitarsus 327–327, telotarsus 376–376; leg II: trochanter 230–242, femur 491–509, genu 287–287, tibia 254–254, basitarsus 292–292, telotarsus 256–256, acrotarsus 90–90; leg III: basitrochanter 185–308, telotrochanter 151–223, femur 442–575, genu 269–446, tibia 294–457, basitarsus 341–424, telotarsus 287–356, acrotarsus 82–113; leg IV: basitrochanter 306–312, telotrochanter 279–314, femur 698–706, genu 451–475, tibia 492–503, basitarsus 456–500, telotarsus 358–360, acrotarsus 107–108.
description: Published as part of Araújo, Marcel Santos De, Palma, Antonella Di, Feres, Reinaldo José Fazzio & Penteado-Dias, Angelica Maria, 2023, Redescription of Neocarus platensis Silvestri, 1905 (Acari: Opilioacaridae) and a new species from the syntype series, pp. 209-224 in Zootaxa 5230 (2) on pages 216-222, DOI: 10.11646/zootaxa.5230.2.5, http://zenodo.org/record/7553538