Ectatoderus Guerin-Meneville 1849
Creators: name: Kim, Taewoo
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Mogoplistidae
Ectatoderus

description: Genus Ectatoderus Guérin-Méneville, 1849
Type species: Ectatoderus nigriventris Guérin-Méneville, 1849
Diagnosis. Male with pronotum somewhat widened, protruding posteriorly; tegmen short squamiform, almost invisible, concealed under elongate pronotum; maxillary palpus long and slender, its apical segment moderately widened; male paraproct with short, right-angled process; ovipositor curved upward slightly.
1. Ectatoderus tamna sp. nov.
(Tables 1, 2, Figs. 1, 4, 7, 10, 13, 16)
Material examined (13 specimens). <Jeju-do> <Holotype> 13, Dongbaekdongsan Seonheul-ri Jocheon-eup Bukjeju-gun, 16 Oct 2008, Kim Tae-Woo; <Paratypes> 235Ƥ, ibid., 16 Oct 2008, Kim Tae-Woo; 132Ƥ, Mt. Sanbangsan Sagye-ri Andeok-myeon Namjeju-gun, 14 Aug–1 Sep 2004 (rearing), Kim Jeong-Kyu and Kim Tae-Woo; 1Ƥ, Bijarim Forest Gujoa-eup Bukjeju-gun, 21 Aug 2000, Sohn Jae-Chun; 13 (last instar), Andeokgyegok Valley Gamsan-ri Andeok-myeon Namjeju-gun, 13 Aug 2004, Kim Jeong-Kyu and Kim Tae-Woo.
Description. General. Whole body dark gray, pronotum reddish gray, appendages more maculated; at a glimpse, looks like an immature nymph due to the invisible tegmina hidden under the pronotum. Head. Head small and round, longer than height; eyes small, widely separated, interocular distance 4.2 times wider than the horizontal diameter of one eye; antennal scape as long as wide, as wide as the horizontal diameter of an antennal socket; fastigium of vertex 1.2 times wider than the horizontal diameter of an antennal socket; clypeus protruding anteriorly, higher than wide in anterior view, with median longitudinal furrow; maxillary palpus with five segments, the ratio of segments being 1:1:2:1.7:2 from base to apex. Thorax. Pronotum 1.5 times longer than wide in dorsal view, 2.5 times longer than head; anterior margin truncated, but posterior margin widely rounded, wider than anterior one; female pronotum as long as wide in dorsal view, 1.5 times longer than head. Wings. Tegmina micropterous, but invisible, almost hidden under pronotum, its hind margin rounded with pubescence; most venations vestigial, only three basic cubitus veins, media and radius hardly perceived; chordal veins and speculum obviously undeveloped; transparent, only lateral field and apical area weakly darkened; female without tegmina and wings. Legs. Fore tibia with a small, round, hardly discernable inner tympanum; hind femur three times longer than middle femur; middle tarsomeres small, rounded, depressed; hind tibia with numerous small spinules on inner and outer dorsal margins; largest inner apical spur as long as one-third of basitarsus; hind basitarsus three times longer than combined length of remaining two tarsomeres, with small spinules on both sides; inner apical spur as long as last tarsomere. Abdomen. Cercus shorter than hind femur, concolorous with body, without bright annulation; male supra-anal plate with smoothly curvate hind margin, its dorsal area with developed short hairs; paraproct with right-angled process, as long as basal width, along its margin with hairs; female subgenital plate roundly triangular, shorter than basal width, hind margin narrowly incised at apex, as wide as deep. Ovipositor. Ovipositor shiny brown, gently recurved, slightly shorter than hind femora; apex subapically swollen, without serration; dorsal valves with 3~4 ventral bristles.
Distribution. Korea, Jejudo Island.
Etymology. ‘ tamna ’ refers to an earlier name for Jejudo Island, which was used for many centuries in ancient Korea.
Remarks. This species is similar to Ectatoderus annulipedus (Shiraki, 1911) from Taiwan, but newly characterized, as shown in Table 1, using the characters from Yang and Yen (2001a).
Character E. tamna sp. nov. E. annulipedus
Body size smaller (mean 7.5 mm in males) larger (mean 9.6 mm in males) Tegmina mostly transparent, venation vestigial shiny black, venation completed Cerci coloration gray, same color as body yellow
Male paraproct as long as basal width and hairy shorter than basal width and smooth
description: Published as part of Kim, Taewoo, 2011, A Taxonomic Study of the Scaly Cricket Family Mogoplistidae (Orthoptera: Ensifera: Grylloidea) in Korea, pp. 41-48 in Zootaxa 2928 on pages 42-43, DOI: 10.5281/zenodo.203714