Description of Aleochara (Xenochara) ichikawai sp. nov., the first confirmed myrmecophilous species of Aleochara Gravenhorst, 1802 from the East Palearctic Region (Coleoptera: Staphylinidae: Aleocharinae) Author Maruyama, Munetoshi The Kyushu University Museum, 6 - 10 - 1 Hakozaki, Higashi-ku, Fukuoka, 812 - 8581 Japan Author Nozaki, Tsubasa Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819 - 0395 Japan Author Kamezawa, Hiromu Tsukiyoshi-machi 32 - 17, Kawagoe-shi, Saitama, 350 - 0825, Japan text Zootaxa 2025 2025-07-29 5666 3 437 444 http://dx.doi.org/10.11646/zootaxa.5360.3.8 journal article 311606 10.11646/zootaxa.5666.3.8 96f0c1ff-3965-4a9b-8e1a-c690303830fb 1175-5326 16611668 8C9509E1-F87C-4F5A-80CD-D70316D7EDC2

TABLE 1. Distinguishing characters of Aleochara (Xenochara) ichikawai sp. nov. and A. (X.) fumata Gravenhorst,

	A. ichikawai sp. nov.	A. fumata Gravenhorst, 1802
Body color except elytra	pale brown to brown (Fig. 1)	brown to dark brown (Klimaszewski et al., 2017: Fig. 20)
Aedeagus (apical lobe in lateral view)	minutely but distinctly curved just before apex (Fig. 9)	almost straight around apex (Fig. 13)
Aedeagus (apical lobe in ventral view)	narrower (Fig. 10)	wider (Fig. 14)
Aedeagus (flagellum)	approximately 1.2–1.3 times longer than median lobe (Fig. 9)	approximately 1.0–1.1 times longer than median lobe (Fig. 13)
Aedeagus (subapical sclerite in lateral view)	thinner, upturned (Fig. 9a: arrow)	thicker, slightly upturned (Fig. 13a: arrow)
Aedeagus (apical sclerite in ventral view)	curved inward (Fig. 10a)	curved outward (Fig. 14a)
Apical lobe of paramere	longer (Fig. 11)	shorter (Fig. 15)
Spermatheca (constriction of apical 1/3 of basal part)	smaller (Fig. 12)	larger (Fig. 16)
Spermatheca (sclerotization of apical part)	thickened around opening of spermathecal gland (Fig. 12: arrow)	not thickened around opening of spermathecal gland (Fig. 16)