Homoplectra inazui Nozaki, 2025, sp. nov.
Creators: name: Nozaki, Takao
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydropsychidae
Homoplectra
Homoplectra inazui

description: Homoplectra inazui sp. nov.
(Figs 10, 13)
Diplectrona japonica nec Banks 1906: Inazu and Nishida 2011, p. 191 (in part); Inazu 2012, p. 8; Inazu 2013, p. 72. Misidentifications.
Diagonosis. This species is similar to H. albomargnata in having a long scape of each antenna, but both male and female are distinguishable from those of the latter by the character states given in the diagnosis of H. albomarginata.
Description
Adult. General morphology and coloration similar to those of H. albomarginata including having long scape on each antenna, each scape 3–4 times as long as its pedicel, approximately same length as basal segment of flagellum, with long setae dorsally. Forewings each 9.0– 9.8 mm long in male (n = 10), 10.0–12.0 mm long in female (n = 10), 9.3 mm in male holotype.
Male genitalia (Figs 10A–10F). Ventrolateral sides of synsclerotized segment IX triangular anteriorly in lateral aspect (Fig. 10A); posteroventral lobe almost square with median apical concavity and acute apicolateral corners in ventral aspect (Fig. 10C); dorsal part of segment IX trapezoidal in dorsal aspect (Fig. 10B); fused with segment X laterally (Figs 10A). Segment X very wide in dorsal aspect, with pair of fin-like dorsolateral projections, pair of posterolateral setose areas protruding posterad (Figs 10A, 10B); pair of posterior processes lacking. Genital chamber with or without pair of short slender inner processes (Fig. 10A), processes rarely long (Fig. 10F); pair of lateral strips weakly sclerotized (Fig. 10A). Inferior appendages without distal segment, long, finger-like and very slightly upturned in lateral aspect (Fig. 10A), extending beyond apex of segment X, each with apex round, with many short spine-like setae subapicomesally (Figs 10A inset, 10C). Phallotheca strongly bent posteroventrad, with long dorsal process acute apically (Figs 10D, 10E); pair of ventral processes 2/3 to 3/4 length as dorsal process, acute apically, slightly thicker subapically (Figs 10D, 10E). Aedeagus evenly curved ventrad, but apex curved dorsad (Fig. 10D); head short, less than 1/10 as long as stem; stem half-pipe-like, with broad lateral flanges (Figs 10D, 10E).
Female genitalia (Figs 10G–10I). Lateral lobes of segment VIII widely separated from each other in ventral aspect (Fig. 10I), their mesal margins weakly concave. Segment IX quadrate in lateral aspect (Fig. 10G), pentagonal in dorsal aspect (Fig. 10H), with transverse sulcus dorsally on posterior 1/3–1/4; pair of sclerotized ribs forming angular ridges on vulvar scale basolaterally in ventral aspect (Fig. 10I); mesal lobe weakly sclerotized, semicircular in lateral aspect (Fig. 10G). Vulvar scale large, tongue-like, membranous posteriorly; with pair of deep holes basolaterally in ventral aspect. Vaginal apparatus bulb-shaped anteriorly in dorsal aspect (Fig. 10H), rectangular posteriorly; posterodorsal part mostly semi-membranous; longitudinal dorsal ridges divergent anteriorly, opening of duct of spermatheca completely surrounded by dark oval mark in dorsal aspect.
Immature stages. Unknown.
Holotype. Male (in alcohol): Uwano, Yado, Muraoka-ku, Kami-cho, Hyogo, 35.4315°N, 134.5819°E, alt. 600 m, 14.v.2006, K. Inazu (KPM-NK TN00690)
Paratypes. 3 males, 2 females, same locality as holotype, 5.v.2004, K. Inazu (KPM-NK TN00700, KPM-NK TN00710); 3 males, Soryuno-taki, Itashino, Muraoka-ku, Kami-cho, alt. 600m, 28.v.2005, K. Inazu (KPM-NK TN00720); 1 male, Torokawa-daki, Itashino, Muraoka-ku, Kami-cho, 28.v.2005, alt. 900 m, K. Inazu (KPM-NK TN00730).
Other specimens examined. JAPAN: HONSHU: Hyogo: 1 female, Hattanno-taki, Niiya, Ojiro-ku, Kami-cho, alt. 750 m, 4.vi.2006, K. Inazu; 1 male, Myoken-zan, Ishihara, Yoka-cho, Yabu-shi, alt. 700 m, 9.v.2004, K. Inazu (KI); 1 male, Betsugu, Sekinomiya, Yabu-shi, alt. 700 m. 3.v.2007, K. Inazu (KI); 1 male, same locality, 5.v.2010, K. Inazu (KI); 1 female, Hachibuse-kogen, Sekimiya-cho, Yabu-shi, 18.v.2009, K. Inazu; 1 male, 2 females, Takenocho-mihara, Toyooka-shi, alt. 420 m, 11.v.2007, K. Inazu (KI); 1 female, same locality, 1.vi.2007, K. Inazu (KI); 1 male, same locality, 14.v.2013, K. Inazu (KI); 1 female, Mihara-oku, Takeno-cho, Toyooka-shi, 29.v.2009, K. Inazu; 1 male, 1 female, Inab, Hidakacho, Toyooka-shi, alt. 600 m, 29.iv.2003, K. Inazu; 1 male, same locality, 25.iv.2004, K. Inazu (KI); 1 male, Sugawara, Shinonsen-cho, alt. 500 m, 30.v.2004, K. Inazu (KI); 1 male, 3 females, Koke-daki, Sugawara, Shinonsen-cho, alt. 800 m, 8.vi.2003, K. Inazu; 3 males, 1 female, same locality, 30.v.2004, K. Inazu (KI).
Etymology. This species is dedicated to Mr Kazuyuki Inazu, who provided me with many valuable specimens including this species.
Distribution. Central Honshu.
Biology. Type series specimens of this species were collected near small streams or falls in mountainous areas (Inazu 2013).
Japanese name. Inazu-kimadara-shima-tobikera.
description: Published as part of Nozaki, Takao, 2025, Redescriptions of Homoplectra japonica (Banks 1906) and H. albomarginata (Ulmer 1907) (Trichoptera, Hydropsychidae), with descriptions of five new similar species from Japan, pp. 303-328 in Zootaxa 5566 (2) on pages 322-326, DOI: 10.11646/zootaxa.5566.2.4, http://zenodo.org/record/14702954