Indohya finitima 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 finitima

description: <i>Indohya finitima</i> Harvey &amp; Burger, n. sp. (Figs. 6B, 56, 57) urn:lsid:zoobank.org:act: 7BB10C00-6DFD-4EF1-9A2B-182BF477B164 <b>Material examined.</b> <i>Holotype adult</i>. AUSTRALIA: <i>Western Australia:</i> Irvine Island, bore ID27, 16°05′37.75″S, 123°33′18.66″E, 1 June–1 August 2011, troglofauna trap, 10 m depth, J. Alexander, S. Werner (WAM T120197). <b>Diagnosis.</b> <i>Indohya finitima</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 all of the others except <i>I. arnoldstrongi</i> by the rounded distal teeth of the fixed chelal finger (at least 2 distal teeth pointed in <i>I. alexanderi</i>, <i>I. cockingi</i>, <i>I. cribbi</i>, <i>I. damocles</i>, <i>I. draconis</i>, <i>I. jessicae</i>, <i>I. lynbeazleyae</i>, <i>I. sagmata</i> and <i>I. scanloni</i>), and differs from <i>I. finitima</i> by at least some of the teeth of the fixed chelal finger being pointed, whereas all teeth are rounded in <i>I. finitima</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 59 there is a substitution to G. <b>Description (adult).</b> <i>Colour (Fig. 56):</i> carapace and pedipalps red-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 6 setae, movable finger with 1 sub-medial seta, all setae acuminate; galea present, long, slender and slightly curved; fixed finger with 14 teeth, larger teeth alternating with smaller teeth; movable finger with 7 small teeth, 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. 57B):</i> long and slender; trochanter smooth, 2.34 ×; femur slightly broadened distally, basal third lightly granulate, without dorsal tactile seta, with 3 stout retrolateral setae near base, 5.18 ×; patella broadened distally, smooth, pedicel not strongly pronounced but basal portion slimmer than distal portion, with several small lyrifissures situated basally on dorsal surface, 3.34 ×; chela (Fig. 57C): hand ovoid, with prolateral and retrolateral faces lightly granulate, chela (with pedicel) 3.51 ×, chela (without pedicel) 3.36 ×, hand (without pedicel) 1.44 × longer than broad, movable finger 1.31 × 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> = 1.40, <i>t</i> acuminate. Both fingers straight in lateral view. Fixed finger smooth, movable finger with several prolateral and retrolateral granulations basally. Chelal teeth (Figs. 57D, E) juxtadentate, fixed finger with 65, teeth 50, 53, 56-57, 62-65 slightly pointed, 1–49, 52, 55, 58–61 rounded, movable finger with 29, 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. 57A) sub-rectangular; smooth; anterior margin slightly convex; epistome absent; lateral margins slightly convex; 1.34 × 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 additional setae. Coxa I with anterior margin not modified; chaetotaxy of coxae I–IV: 4: 5: 4: 6. <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 3.87 × longer than broad; metatarsi shorter than tarsi; subterminal tarsal seta acuminate; claws smooth, arolium slightly shorter than claws; arolium not divided. <i>Abdomen:</i> absent. <i>Dimensions (mm):</i> adult holotype (WAM T120197). Body length? (damaged). Pedipalp: trochanter 0.340 / 0.145, femur 0.880 / 0.170, patella 0.685 / 0.205, chela (with pedicel) 1.370 / 0.390, chela (without pedicel) 1.31, hand (without pedicel) 0.560, movable finger length 0.735. Carapace 0.610 / 0.455. Leg IV: femur + patella 0.625 / 0.180, tibia 0.450 / 0.075, metatarsus 0.150 / 0.055, tarsus 0.360 / 0.045. <b>Distribution and remarks.</b> <i>Indohya finitima</i> has only been collected from subterranean ecosystems on Irvine Island which is situated in the western Kimberley region (Fig. 6B). The site is situated within the Northern Kimberley bioregion. The holotype is damaged and its sex cannot be determined as the abdomen is missing (Fig. 56). Nevertheless, there is sufficient morphological and molecular data to demonstrate that it is distinct from all other <i>Indohya</i> species. The species was previously known by WAM identification code <i>Indohya</i> ‘PSE197’. <b>Conservation assessment</b>. <i>Indohya finitima</i> has been collected from subterranean habitats on Irvine Island, where the surface formations are intact. The species does not appear to meet the status of threatened using the criteria developed by the International Union for Conservation of Nature (2012). <b>Etymology.</b> The specific epithet refers to the close geographic and phylogenetic relationship this species shares with <i>I. sachsei</i> (<i>finitimus</i>, Latin, adjoining, bordering, near, related) (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 100-101, 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."]}