Indohya sagmata 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 sagmata

description: <i>Indohya sagmata</i> Harvey &amp; Burger, n. sp. (Figs. 1–3, 5, 48, 49) urn:lsid:zoobank.org:act: 48172E49-D718-43A0-A282-D0B467CF5C04 <b>Material examined.</b> <i>Holotype male</i>. AUSTRALIA: <i>Western Australia:</i> Packsaddle 6, Area C, 100 km WNW. of Newman, 22°53′55.32″S, 119°04′04.12″E, 18 April 2008, troglofauna net scrape, P. Bell, K. Muirhead (WAM T138967). <i>Paratypes</i>. AUSTRALIA: <i>Western Australia:</i> 1 Ô, Packsaddle P 4, 100 km NW. of Newman, 22°54′13.7″S, 118°59′03.4″E, 9 April 2010, troglofauna scrape, G.B. Pearson, M.K. Curran (WAM T111711). <i>Other material</i>. AUSTRALIA: <i>Western Australia:</i> 1 &amp;female;, Packsaddle Range, Packsaddle deposit 6, bore hole PSF0091 R, 22°53′57″S, 119°04′04″E, 10 December 2008, stygofauna scraping, staff from Subterranean Ecology (WAM T97275; specimen consumed during DNA extraction); 1 tritonymph, Packsaddle P 4, 100 km NW. of Newman, 22°54′05.3″S, 118°59′15.8″E, 9 April 2010, G.B. Pearson, M.K. Curran (WAM T111710); 1 tritonymph, Packsaddle P 4, 100 km NW. of Newman, 22°54′10.2″S, 118°59′14.0″E, 26 June 2010, troglofauna scrape, G.B. Pearson, M.K. Curran (WAM T111712). <b>Diagnosis.</b> <i>Indohya sagmata</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 smooth femur and patella (femur and patella granulate in <i>I. cribbi</i> and <i>I. lynbeazleyae</i>). It differs from <i>I. damocles</i> by its smaller size [e.g. chela (with pedicel) 1.50–1.66 (Ô) mm, vs. 2.22–2.32 (Ô), 2.22–2.55 (&amp;female;) mm in <i>I. damcoles</i>], and from <i>I. jessicae</i> and <i>I. scanloni</i> by its narrow pedipalpal segments [e.g. chela (with pedicel) at least 5.0 × longer than broad; femur at least 6.5 × longer than broad, vs. chela (with pedicel) less than 4.5 × longer than broad; femur less than 6.0 × longer than broad]. There are no unique nucleotide substitutions in <i>COI</i> mtDNA that distinguish this species from all other species of <i>Indohya</i>. The four sequenced specimens differ from all other sequenced specimens of <i>Indohya</i> by 16.5–29.0% (Table 2). <b>Description (adult).</b> <i>Colour (Fig. 48):</i> Carapace and pedipalps red-brown, tergites yellow-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 setae, except for 6 in right chelicera of holotype, movable finger with 1 sub-medial seta, all setae acuminate; galea present, long, slender and slightly curved; fixed finger with 10 teeth (Ô), each approximately same size; movable finger with 8, each approximately same size; with 2 dorsal and 1 ventral lyrifissures; lamina exterior absent; rallum with 7 blades, all blades with anterior spinules, basal blade shorter than others. <i>Pedipalp (Fig. 49B):</i> long and slender; trochanter smooth, 1.94–2.54 (Ô) ×; femur slightly broadened distally, smooth, without dorsal tactile seta, with 3 stout retrolateral setae near base, 6.71–6.94 (Ô) ×; 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, 4.85–5.11 (Ô) ×; chela (Fig. 49C): hand slender, with prolateral face lightly granulate, chela (with pedicel) 5.00–5.03 (Ô) ×, chela (without pedicel) 4.70–4.77 (Ô) ×, hand (without pedicel) 1.75–1.98 (Ô) × longer than broad, movable finger 1.50–1.54 (Ô) × 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> distal to <i>it</i>; movable finger with 4 trichobothria, <i>sb</i> much 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</i> / <i>sb–b</i> = 1.69 (Ô), <i>t</i> acuminate. Both fingers straight in lateral view. Fixed finger smooth, movable finger with several retrolateral granulations basally. Chelal teeth (Figs. 49D, E) juxtadentate, fixed finger with 85 (Ô) teeth, teeth 1–10, 38, 41, 43–85 pointed, remainder rounded or truncate, movable finger with 54, 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. 49A) sub-rectangular; smooth; anterior margin slightly convex; epistome absent; lateral margins slightly convex; 1.30 (Ô) × longer than broad; with 12 setae arranged 3: 1: 4: 2: 2 (Ô holotype), 4: 0: 4: 2: 2 (Ô paratypes); without furrows; eyes absent. Manducatory process distally triangular, with 2 distal setae; pedipalpal coxa with 6 additional setae. Coxa I with anterior margin not modified; chaetotaxy of coxae I–IV: Ô, 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 4.68 (Ô) × 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, 3: 4: 5: 6: 6: 6: 6: 6: 6: 4 (including 2 tactile setae): 4 (including 2 tactile setae): 2; arranged in single rows; sternal chaetotaxy Ô, 19: (2) 20 [2 + 2] (2): (2) 4 (2): 9: 9: 8: 8: 8: 7: 4 (including 2 tactile setae): 2; 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> male: 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. <i>Dimensions (mm):</i> male holotype (WAM T138967) (followed by 1 other male, when measured, in parentheses). Body length (excluding chelicerae) 2.32. Pedipalp: trochanter 0.355 / 0.140 (0.330 / 0.170), femur 1.040 / 0.155 (1.180 / 0.170), patella 0.80/0.165 (0.920 / 0.180), chela (with pedicel) 1.500 / 0.300 (1.660 / 0.330), chela (without pedicel) length 1.430 (1.550), chelal hand (without pedicel) length 0.525 (0.625), movable finger length 0.810 (0.985). Carapace 0.670 / 0.515. Leg IV: femur + patella 0.655 / 0.140, metatarsus?, tarsus?. <b>Description (tritonymph).</b> <i>Colour:</i> pale, yellow-white. <i>Chelicera:</i> hand with 5 setae, movable finger with 1 sub-medial seta. <i>Pedipalp:</i> trochanter 2.35 ×, femur 6.54 ×, patella 4.11 ×, chela (with pedicel) 4.75 ×, chela (without pedicel) 4.48 ×, hand (without pedicel) 1.71 × longer than broad, movable finger 1.62 × longer than hand (without pedicel). Fixed finger with 7 trichobothria (Fig. 49F), <i>eb</i>, <i>esb</i>, <i>est</i>, <i>et</i>, <i>ib</i>, <i>ist</i> and <i>it</i> present; movable finger with 3 trichobothria; <i>b</i>, <i>st</i> and <i>t</i> present, <i>st</i> much closer to <i>t</i> than to <i>b</i>. Fixed chelal finger with 55 low, juxtadentate teeth, movable chelal finger with 24 low, juxtadentate teeth. <i>Cephalothorax:</i> carapace 1.36 × longer than broad; with 12 setae, arranged 4: 0: 4: 2: 2, including posterior margin with 2 setae; smooth; without furrows; eyes absent. Coxal chaetotaxy 3: 3: 3: 3. <i>Legs:</i> metatarsi and tarsi not fused. <i>Abdomen:</i> tergal chaetotaxy 2: 4: 6: 6: 6: 6: 6:?:?:?:?: 2; sternal chaetotaxy not visible. <i>Dimensions (mm):</i> WAM T111712. Body length ca. 1.49. Pedipalp: trochanter 0.270 / 0.115, femur 0.785 / 0.120, patella 0.555 / 0.135, chela (with pedicel) 1.140 / 0.240, chela (without pedicel) 1.075, hand (without pedicel) length 0.410, movable finger length 0.665. Carapace 0.565 / 0.415. <b>Distribution and remarks.</b> <i>Indohya sagmata</i> has been recorded from subterranean habitats within a single small ridge which is separated from another ridge that holds its sister species, <i>I. cockingi</i> (Fig. 5). The species was previously known by WAM identification code <i>Indohya</i> ‘PSE179’. The specimens are in poor condition, and the holotype lacks most of its legs and the left pedipalp (Fig. 48). <b>Conservation assessment</b>. <i>Indohya sagmata</i> is only known from a single rocky outcrop, with two collection sites only 9 km apart. Although the site has been approved for an iron ore mine, it is currently undeveloped so there is no current threat to the species. Therefore, it does not meet the status of threatened, at this time, using the criteria developed by the International Union for Conservation of Nature (2012). <b>Etymology.</b> The species epithet is a noun referring to the presence of this species in the Packsaddle Range (<i>sagma</i>, Greek, pack-saddle) (Brown 1956).
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 89-92, DOI: 10.11646/zootaxa.5342.1.1, http://zenodo.org/record/8323879
description: {"references": ["Brown, R. W. (1956) Composition of scientific words. Revised Edition. Smithsonian Institution Press, Washington, D. C., 882 pp."]}