Parena (Crossoglossa) cruralis Andrewes, Borneo. E 1933
Creators: name: Shi, Hongliang
name: Liang, Hongbin
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Parena
Parena cruralis

description: [8] Parena (Crossoglossa) cruralis Andrewes, 1933
Habitus: Figs 21H, 21I.
Andrewes, 1933: 286 (Parena testacea var. cruralis; type locality: Java: Pengalengan; holotype in NHML); Lorenz, 2005: 490 (Parena testacea cruralis).
Type material examined. Parena cruralis Andrewes: Holotype (NHML, Fig. 21H): female, body length = 9.4 mm, board mounted, " Java occident. / Pengalengan / 4000’ 1893 / H. Fruhstorfer", "Ex coll. / T. Sloane", " 169 ", "Type" [red label]; " Parena / testacea Chd. / v. Cruralis Andr. / Type H.E. Andrewes det.", "H.E. Andrewes Coll. / B.M. 1945-97".
Non-type material examined. 1 female (IZAS), " Boreno: Sahah, Keningau district, Jungle Girl Camp. N5.4430, E116.4512, 1182 m; Shi H.L. & Liu Y. lgt. light trap, Ins. Zoo., CAS. 2016.V.1 N" <Figs 8D, 14F, 21I>. 1 female (CRS), " N. Borneo 1150 m Tambunan distr. Trus Madi m.IV.12". 1 female (CRS), " Malaysia — Borneo Sabah, Trus-Madi III.2007. Gromenko".
Comparisons. P. cruralis is distinguishable from the other four species in this species group by the combination of: elytra sutural angles shortly pointed, forming short denticles; outer apical angles almost rounded; elytra without black patch; tibiae black. P. cruralis is very similar to P. mellea, but only different in tibiae black and elytra disc depressions absent or much shallower than in P. mellea.
Description. Body length 9.4–11.2 mm. Dorsum pale yellow; antennomere 1 yellow, remaining ten antennomeres black; apices of mandibles black; terminal labial palpomere black, terminal and penultimate maxillary palpomeres black; tarsomeres black; tibiae black, middle portion dark brown; venter pale yellow. Pronotum strongly transverse, PW/PL = 1.63–1.70; much wider than head, PW/HW = 1.10–1.19; widest at anterior third, lateral explanations very wide. Elytra without microsculpture; striae not incised, replaced by rows of very fine punctures; intervals completely flat, with punctures sparser than in striae; disc not depressed or very shallowly depressed near middle of intervals 3 to 6; apical truncation distinct, straight or slightly rounded; outer apical angles almost rounded, not forming distinct angles; sutural angles slightly pointed, forming short denticles. Apex of abdominal sternite VII very weakly projected at middle in females (Fig. 8D). Gonocoxite II of ovipositor dichotomous, inner branch with two ensiform setae apically, outer branch with two or three ensiform setae apically. Male unknown.
Distribution (Map 4, magenta). West Java and north Borneo.
Geographical variation. Specimens from Borneo are somewhat different from the holotype from Java. They are much larger (ca. 11 mm vs 9.6 mm) and elytra disc with very shallow depressions in the middle of intervals 3 to 6 (without depression in the holotype). Based on their similar leg color, we determine them all as P. cruralis.
Remarks. P. cruralis was originally described as a variety of P. testacea, and recently (Lorenz, 2005) treated as a subspecific name under P. testacea. However, after the examination of the holotype, we found that P. cruralis is closer to P. mellea than to P. testacea for the similarities in elytra apices and interval punctures. The taxonomic position of P. cruralis is still doubtful because the male is unknown. We treat P. cruralis as a separate species for now because it is markedly different from other species in coloration.
description: Published as part of Shi, Hongliang & Liang, Hongbin, 2023, Taxonomic revision of the genus Parena Motschulsky, 1860 (Coleoptera, Carabidae, Lebiini, Metallicina), pp. 1-144 in Zootaxa 5286 (1) on pages 43-44, DOI: 10.11646/zootaxa.5286.1.1, http://zenodo.org/record/7958937