Ectamenogonus, Buysson, 1893

Arimoto, Kôichi, 2022, Taxonomic revision of the genus Ectamenognonus Buysson (Coleoptera, Elateridae, Elaterinae) from Japan, Zootaxa 5087 (2), pp. 306-334 : 308-309

publication ID	https://doi.org/ 10.11646/zootaxa.5087.2.4
publication LSID	lsid:zoobank.org:pub:701019E0-F757-40E9-A54D-F936DBE0BCC7
DOI	https://doi.org/10.5281/zenodo.5824226
persistent identifier	https://treatment.plazi.org/id/03D1A92A-FFAD-FFCC-3085-105AFA51EE03
treatment provided by	Plazi
scientific name	Ectamenogonus
status

Treatment

Key to species of the genus Ectamenogonus from Japan

1. Body slender (EI:>2.3, BI:>1.9) ( Fig. 1A View FIGURE 1 ). Spiculum ventrale 3.6–4.2 x longer than sternite VIII. Ovipositor 1.2–1.3 x longer than length of midline of abdominal ventrites............................................................... 2

- Body robust (EI: <2.3, BI: <1.9) ( Fig. 1B–G View FIGURE 1 ). Spiculum ventrale 2.5 x longer than sternite VIII. Ovipositor 0.9 x longer than length of midline of abdominal ventrites................................................ E. matobai ( Kishii, 1973)

2. Antennomere IV 1.1–1.5 x longer than II–III combined ( Figs. 5D View FIGURE 5 , 8D View FIGURE 8 ). Prothorax somewhat slender (PI: 109–121) ( Fig. 1B–E View FIGURE 1 ). Aedeagus slender (3.6–4.3 times longer than wide) ( Figs. 6E, F View FIGURE 6 , 11E, F View FIGURE 11 ). Median lobe exceeding apices of parameres by apical 1/4 to 1/3 ( Figs. 6E, F View FIGURE 6 , 11E, F View FIGURE 11 ). Paramere apex length 1.9–2.2 x width of parameres at expansions ( Figs. 6G View FIGURE 6 , 11G View FIGURE 11 ). Bursa copulatrix long (1.7–2.7 times length of uterus), with two clusters of sclerotized spines ( Figs. 7A View FIGURE 7 , 13A View FIGURE 13 )........... 3

- Antennomere IV 0.9–1.1 x longer than II–III combined ( Fig. 14D View FIGURE 14 ). Prothorax somewhat robust (PI: 101–111) ( Fig. 1F, G View FIGURE 1 ). Aedeagus robust (3.3 times longer than wide) ( Fig. 16E, F View FIGURE 16 ). Median lobe exceeding apices of parameres by apical 1/5 to 1/4 ( Fig. 16E, F View FIGURE 16 ). Paramere apex length 1.3–1.8 x width of parameres at expansions ( Fig. 16G View FIGURE 16 ). Bursa copulatrix short (1.0–1.1 times length of uterus), with a cluster of sclerotized spines ( Fig. 18E View FIGURE 18 )........................ E. robustus ( Kishii, 1966)

3. Antennae just reaching or extending beyond pronotum posterior lateral apices by apical antennomere in male ( Fig. 10B–D View FIGURE 10 ). Posterior edge of scutellar shield rounded but truncate in some ( Fig. 8G View FIGURE 8 ). Elytra 2.0–2.2 times longer than pronotum length (BI: 202–229) ( Fig. 1D, E View FIGURE 1 ). Bursa copulatrix shorter (1.7–2.3 times length of uterus) ( Fig. 13A View FIGURE 13 )..... E. plebejus ( Candèze, 1873)

- Antennae not reaching pronotum posterior lateral apices by apical antennomere in male ( Fig. 10A View FIGURE 10 ). Posterior edge of scutellar shield emarginate medially ( Fig. 5G View FIGURE 5 : arrow). Elytra 1.9–2.0 times longer than pronotum length (BI: 191–199) ( Fig. 1B, C View FIGURE 1 ). Bursa copulatrix longer (2.4–2.7 times length of uterus) ( Fig. 7A View FIGURE 7 )........................ E. miyakoensis Arimoto sp. n.