Indohya scanloni Harvey &amp; Burger 2023, n. sp.
Creators: name: Harvey, Mark S.
name: Burger, Mieke A. A.
name: Abrams, Kym M.
name: Finston, Terrie L.
name: Huey, Joel A.
name: Perina, Giulia
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Pseudoscorpiones
Hyidae
Indohya
Indohya scanloni

description: <i>Indohya scanloni</i> Harvey &amp; Burger, n. sp. (Figs. 1–3, 5, 50, 51) urn:lsid:zoobank.org:act: 2833D53F-B4C6-45DB-9B4A-279256E7A331 <b>Material examined.</b> <i>Holotype male</i>. AUSTRALIA: <i>Western Australia:</i> Upper Weeli Wolli, ca. 70 km NW. of Newman, 22°55′02.41″S, 119°12′20.33″E, 10 May 2011, stygofauna net, 3–6 m depth, J.S. Cocking, M.D. Scanlon (WAM T140479). <i>Paratype</i>: AUSTRALIA: <i>Western Australia:</i> 1 &amp;female;, collected with holotype (WAM T151338). <b>Diagnosis.</b> <i>Indohya scanloni</i> belongs to a group of <i>Indohya</i> species that have 12 setae on the carapace and no eyes. It differs from <i>I. anastomosa</i>, <i>I. aquila</i> and <i>I. humphreysi</i> by the presence of 4 setae on tergite I (only 2 setae in <i>I. anastomosa</i>, <i>I. aquila</i> and <i>I. humphreysi</i>). It differs from <i>I. arnoldstrongi</i>, <i>I. cockingi</i> and <i>I. finitima</i> by having numerous pointed teeth on the fixed chelal finger, and from <i>I. cribbi</i> and <i>I. lynbeazleyae</i> by the partially granulate pedipalpal femur and smooth patella (femur and patella granulate in <i>I. cribbi</i> and <i>I. lynbeazleyae</i>). It differs from <i>I. damocles</i> and <i>I. sagmata</i> by its less narrow pedipalpal segments [e.g. chela (with pedicel) less than 4.5 × longer than broad; femur less than 6.0 × longer than broad, vs. chela (with pedicel) at least 5.0 × longer than broad; femur at least 6.5 × longer than broad], and from <i>I. jessicae</i> by its smaller size [e.g. chela (with pedicel) 1.395 (Ô), 1.505 (&amp;female;), vs. 1.81 (&amp;female;) mm in <i>I. jessicae</i>]. It also differs from all other <i>Indohya</i> species for which sequence data are available by a synapomorphy in <i>COI</i> mtDNA: at base 488 there is a substitution to C. The single sequenced specimen differs from all other sequenced specimens of <i>Indohya</i> by 15.6–26.4% (Table 2). <b>Description (adult).</b> <i>Colour (Fig. 50):</i> carapace and pedipalps deep yellow-brown, tergites light brown. <i>Setae and cuticle:</i> setae long, mostly straight and acicular; most cuticular surfaces smooth and glossy. <i>Chelicera:</i> surface smooth; hand with 5 (Ô), 5 or 6 setae (&amp;female;), movable finger with 1 sub-medial seta, all setae acuminate; galea present, long, slender and slightly curved; fixed finger with 15 (Ô), 14 (&amp;female;) small teeth, each approximately same size; movable finger with 7 (Ô, &amp;female;) small teeth, each approximately same size; with 2 dorsal and 1 ventral lyrifissures; lamina exterior absent; rallum with 7 (Ô, &amp;female;) blades, all blades with anterior spinules, basal blade shorter than others. <i>Pedipalp (Fig. 51B):</i> long and slender; trochanter smooth, 2.30 (Ô) ×, 2.44 (&amp;female;) ×; femur slightly broadened distally, basal third lightly granulate, without dorsal tactile seta, with 3 stout retrolateral setae near base, 5.94 (Ô) ×, 5.61 (&amp;female;) ×; patella slightly broadened distally, smooth, pedicel not strongly pronounced but basal portion slimmer than distal portion, with several small lyrifissures situated basally on dorsal surface, 3.58 (Ô) ×, 3.81 (&amp;female;) ×; chela (Fig. 51C): hand slender, with dorsal, prolateral and retrolateral faces lightly granulate, chela (with pedicel) 4.10 (Ô) ×, 3.91 (&amp;female;) ×, chela (without pedicel) 3.81 (Ô) ×, 3.61 (&amp;female;) ×, hand (without pedicel) 1.57 (Ô) ×, 1.55 (&amp;female;) × longer than broad, movable finger 1.33 (Ô) ×, 1.24 (&amp;female;) × longer than hand (without pedicel). Fixed finger with 8 trichobothria, <i>eb</i>, <i>esb</i> and <i>isb</i> in straight row at base of finger, <i>ib</i> situated dorsally at the end of the chelal hand, <i>isb</i> at the basal end of the fixed finger, <i>ib</i> situated on dorsum of chelal hand, <i>it</i> closer to <i>et</i> than to <i>est</i>, <i>et</i> slightly distal to <i>it</i>; movable finger with 4 trichobothria, <i>sb</i> closer to <i>b</i> than to <i>st</i>, <i>st</i> situated much closer to <i>t</i> than to <i>sb</i>; ratio <i>sb–st/sb–b</i> = 1.50 (Ô), 1.28 (&amp;female;), <i>t</i> acuminate. Both fingers straight in lateral view. Fixed finger smooth, movable finger with several prolateral and retrolateral granulations basally. Chelal teeth (Fig. 51D) juxtadentate, fixed finger with 69 (Ô), 77 (&amp;female;) teeth, teeth 1–9, 35–43, 45–60, 62–69 acute, remainder rounded (Ô), teeth 1–10, 36, 38–48, 50, 52–54, 56–77 acute (&amp;female;), movable finger with ca. 22 (Ô), 30 (&amp;female;) low but discernible teeth. Venom apparatus present only in movable chelal finger, venom duct long, terminating in nodus ramosus between <i>sb</i> and <i>st</i>. <i>Cephalothorax:</i> carapace (Fig. 51A) sub-rectangular; smooth; anterior margin slightly convex; epistome absent; lateral margins slightly convex; 1.19 (Ô) ×, 1.24 (&amp;female;) × longer than broad; with 12 setae arranged 4: 0: 4: 2: 2; without furrows; eyes absent. Manducatory process distally triangular, with 2 distal setae; pedipalpal coxa with 6 (Ô), 7 (&amp;female;) additional setae. Coxa I with anterior margin not modified; chaetotaxy of coxae I–IV: Ô, 4: 4: 6: 4; &amp;female;, 4: 4: 4: 5. <i>Legs:</i> femora I and II much longer than patellae I and II, respectively; femora I and II with basal swelling; femora I and II with primary slit sensillum directed transversely; junction between anterior femora and patellae perpendicular; junction between posterior femora and patellae slightly oblique; femora III and IV much smaller than patellae III and IV, respectively; femur + patella IV 3.91 (Ô) × longer than broad; femur + patella IV 4.03 (&amp;female;) × longer than broad; metatarsi shorter than tarsi; subterminal tarsal seta acuminate; claws smooth, arolium slightly shorter than claws; arolium not divided. <i>Abdomen:</i> tergites not divided; tergal chaetotaxy Ô, 4: 4: 6: 6: 6: 6: 6: 6: 6: 4 (including 2 tactile setae): 4 (including 2 tactile setae): 2; &amp;female;, 4: 4: 6: 6: 6: 6: 6: 6: 6: 4: 4 (including 2 tactile setae): 2; arranged in single rows; sternal chaetotaxy Ô, 22: (2) 16 [2 + 2] (2): (2) 6 (2): 9: 8: 7: 9: 8: 6 (including 2 tactile setae): 7 (including 4 tactile setae): 2; &amp;female;, 12: (2) 6 (3): (2) 8 (2): 10: 9: 9: 10: 9: 7: 4 (including 2 tactile setae): 2; setae of anterior genital operculum (sternite II) of &amp;female; minute; posterior tergites and sternites with several tactile setae; medial sternites without suture line; pleural membrane uniformly granulate; without setae; stigmatic helix present. <i>Genitalia:</i> Lateral genital sacs large and ovoid; median genital sac short and ovoid; ejaculatory duct atrium large and rounded; dorsal apodeme wing-like; without a pair of large dorsal genital sacs; with 2 pairs of setae within genital atrium. Female: with large gonosac that is covered with scattered pores. <i>Dimensions (mm):</i> male holotype (WAM T140479). Body length (excluding chelicerae) 2.08. Pedipalp: trochanter 0.345 / 0.150, femur 0.950 / 0.160, patella 0.680 / 0.190, chela (with pedicel) 1.395 / 0.340, chela (without pedicel) length 1.295, chelal hand (without pedicel) length 0.535, movable finger length 0.710. Carapace 0.645 / 0.540. Leg IV: femur + patella 0.625 / 0.160, tibia 0.470 / 0.085, metatarsus 0.215 / 0.060, tarsus 0.400 / 0.045. Female paratype (WAM T151338). Body length (excluding chelicerae) 2.32. Pedipalp: trochanter 0.390 / 0.160, femur 1.010 / 0.180, patella 0.800 / 0.210, chela (with pedicel) 1.505 / 0.385, chela (without pedicel) 1.390, hand (without pedicel) 0.595, movable finger length 0.735. Carapace 0.720 / 0.580. Leg IV: femur + patella 0.665 / 0.165, tibia 0.495 / 0.085, metatarsus 0.225 / 0.070, tarsus 0.420 / 0.045. <b>Distribution and remarks.</b> <i>Indohya scanloni</i> is a blind, troglobitic species that has only been collected from a borehole situated in Weeli Wolli Creek in the south-eastern Pilbara region of Western Australia (Fig. 5). The molecular data recovered a strong phylogenetic relationship with <i>I. cockingi</i>, <i>I. incomperta</i>, <i>I. sagmata</i> and <i>I. silenda</i>, which all occur in subterranean ecosystems in the same general region of the Pilbara (Fig. 5). The species was previously known by WAM identification code <i>Indohya</i> ‘PSE186’. <b>Conservation assessment</b>. <i>Indohya scanloni</i> has been collected from a single borehole in a subterranean deposit, but it is unknown whether it is more widely distributed in the local area. However, the creek is extensive and it is therefore likely that the distribution of <i>I. scanloni</i> may extend further into the local area. The species does not meet the status of threatened using the criteria developed by the International Union for Conservation of Nature (2012). <b>Etymology.</b> This species is named for Michael Scanlon, one of the collectors of the type specimens.
description: Published as part of <i>Harvey, Mark S., Burger, Mieke A. A., Abrams, Kym M., Finston, Terrie L., Huey, Joel A. &amp; Perina, Giulia, 2023, The systematics of the pseudoscorpion genus Indohya (Pseudoscorpiones: Hyidae) in Australia, pp. 1-119 in Zootaxa 5342 (1)</i> on pages 92-95, DOI: 10.11646/zootaxa.5342.1.1, http://zenodo.org/record/8323879