Hancockcandonopsis inachos Karanovic 2018, sp. nov.
Creators: name: Karanovic, Ivana
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Candonidae
Hancockcandonopsis
Hancockcandonopsis inachos

description: Hancockcandonopsis inachos sp. nov.
(Figures 1–4)
Type locality: Bore 30150, Peel River alluvial aquifer, Tamworth, New South Wales, 150°54’45”E 31°04’56”S, 28/09/2005, collector Peter Hancock.
Material examined. Holotype: male dissected on one slide (P. 100296); Allotype: female dissected on one slide (P. 100297), Paratypes: one female dissected on one slide (P. 100298), two females and one male on SEM stub, 48 adult specimens in alcohol, all from the type locality.
Etymology: Greek “ Inachos ”—river God.
Differential diagnosis. Carapace trapezoidal in lateral view, surface smooth; A1 7-segmented; second segment of male A2 subdivided; prehensile palps symmetrical and with strongly sclerotized bases of subterminal cuticular structures; d1-seta on L6 absent; f-seta on both L6 and L7 present; hemipenis with distal and lateral projections of a-lobe, both rounded, b-lobe with nipple-like inner margin.
Description of male. Carapace trapezoidal in lateral view (Figures 1A,B, 3A). Dorsal margin flat medially and inclined towards anterior end. Anterior and posterior margins rounded, posterior one being slightly broader than anterior one. LV overlaps RV dorsally with pronounced flange. Ventral margin straight. Shell surface smooth and covered with long and dense sensilla, exiting from pores with lip margin. Inner calcified margin narrower posteriorly than anteriorly. Marginal pore canals short and not branching. Maximum L around 0.8 mm. Greatest H situated behind middle, equaling 50% of total L.
A1 (Figure 3C) 7-segmented. First segment with two anterior and two posterior setae. Second segment with one short anterior seta. Third and fourth segments with one short anterior and posterior seta each. Fifth segment with two long setae; sixth segment with two long and two short setae. Terminal segment with two long, one short seta and aesthetasc, the latter about 4 times longer than terminal segment. All 5 distal segments almost equally long.
A2 (Figure 3H) 6-segmented with 2-segmented protopodite and 4-segmented endopodite. Exopod with one long and two short setae. Aesthetasc Y long, exceeding distal margin of second endopodal segment. First endopodal segment with two setae postero-distally. Penultimate segment divided with male sexual bristles. Only z2-seta transformed into claw. G1- and G3-claws reduced, G2-claw long. Gm-claw long, GM-claw short.
Md-palp (Figure 3G) 4-segmented. First segment anteriorly with two long and two short setae. S1 seta long and plumose, S2 seta short and pappose; α seta also pappose. Second segment with two setae anteriorly, reaching mid length of the following segment; posteriorly, second segment with three setae in a bunch (all pappose, and subequally long) and one additional, pappose seta situated more medio-distally on the segment, β-seta not observed. Third segment with three smooth setae antero-distally, smooth γ-seta, and one additional seta anteromedially; two thin setae postero-distally and one thick seta also postero-distally, all smooth. Terminal segment short and with one central, broadly fused claw, one additional anterior claw, and two thin posterior setae.
Mxl-palp (Figure 3F) with four setae on first segment, all situated antero-distally on the segment. Second segment with two claw-like setae (both situated antero-distally), one thin seta inserted between them, and additional three, subequally long setae more posteriorly on the segment. Terminal segment rectangular.
Rake-like organ (Figure 3I) with approximately 20 small teeth.
Prehensile palps (Figures 1D, 3D, E) almost symmetrical, both with elongated bodies and short, curved fingers. One of two subapical cuticular structures with well sclerotized base.
L6 (Figure 4A) 5-segmented. Basal setae absent. First, second and third endopodal segments with one short seta each (additional small seta on the third segment not observed). Terminal segment with two setae (h3 seta minute) and one long claw, serrated distally.
L7 (Figure 4F) 5-segmented. Basal segment with all three setae (d1, d2, dp). Endopodal segment with e-, f-, and g-setae. Terminal segment with three setae, h3-seta longest and hook-like distally, followed by h2- and h1-seta.
UR and attachment (Figure 4C, D). UR without posterior seta, anterior seta reaching only ¼ of anterior claw. L ratios between anterior margin, anterior claw, and posterior claw 2: 1.3: 1.
Hemipenis (Figures 1C, 4E) robust. a-lobe with distal and lateral projections, both rounded. b-lobe with nipple-like inner margin. Ejaculatory process distally worm-like.
Zenker-organ (Figure 4B) with 5+2 whorls of spines.
Description of female. Carapace (Figures 2A–C, 3B) similar to male, but with slightly less rounded posterior margin. Surface same as in male (Figure 2D). L same as male. Greatest H 53% of L.
A2 (Figure 3J) with all four t-setae present, and two setae antero-medially on second endopodal segment. z1- seta longer and stronger than other two. G2-claw as long as all other claws.
UR and attachment (Figure 4G, H). Attachment more branching than in male. L ratios between anterior uropodal ramus, anterior and posterior claws 2.2: 1.2: 1. Genital field rounded.
All other soft parts same as in male.
description: Published as part of Karanovic, Ivana, 2018, A new Candonopsini (Ostracoda) genus from subterranean waters of New South Wales (Australia), pp. 247-267 in Zootaxa 4379 (2) on pages 249-254, DOI: 10.11646/zootaxa.4379.2.6, http://zenodo.org/record/1175490