Nebria (Falcinebria) elephanta Sasakawa, 2025, sp. nov.
Year: 2025
Type: other
Abstract: Nebria (Falcinebria) elephanta sp. nov. Figs 3, 13 Nebria reflexa: Uéno (1985): 56 (part; subgenus not specified). Type materials. Holotype: ♂ (KS), Japan • Tokushima Prefecture, Tsurugi-cho, Ichiu, near Tsurugisan Ski Area, alt. 1000 m, 14-VII-2006, Masato Mori leg. Paratypes: 1 ♂ 1 ♀ (KS), Japan • Tokushima Prefecture, Higashimiyoshi-cho, Nishisho, near Sajiki-tôge Pass, alt. 800 m, 10-VII-1999, Masato Mori leg. Diagnosis. Similar to the locally adjacent species N. chugokuensis Sasakawa, 2020 and N. uenoi Nakane, 1963, but distinguished from N. chugokuensis by a smaller body size (in N. chugokuensis, 9.97–10.32 mm for males and 10.69–11.75 mm for females; Sasakawa 2020) and the absence of a concavity on the ventral surface of the aedeagal apex (present in N. chugokuensis), and from N. uenoi by the shape of the endophallus, in particular, the developed gonopore protrusion (undeveloped in N. uenoi) and the absence of lateroapical lobes on both sides (present in N. uenoi). Description. Body length: ♂, 9.70–9.81 mm, 9.75 ± 0.08 mm (n = 2); ♀, 10.54 mm (n = 1). Sternum 7 with two setae on each ventrolateral side in the male, and three in the female. Other external structures, coloration, and chaetotaxy as in other related species that had been previously regarded as N. reflexa (Sasakawa 2020). Dorsobasal lobe large, semi-spherical. Dorsomedian lobe absent. Dorsoapical lobe scalene trapezium-shaped in dorsal view, with the left and right sides concave; the left side more concave than the right; the left apical corner more protruding than the right. Laterobasal lobes with the ventrobasal surface largely swollen in a semi-spherical shape; the other part less swollen but wide, reaching the base of the dorsobasal lobe. Ventrobasal swelling large, semi-ellipsoid. Lateroapical lobes absent on both right and left sides. Gonopore protrusion markedly large and long, with total length along the median line from the base of the protrusion to the gonopore (apical end of the protrusion) longer than that from the base of the endophallus (ostium of the aedeagus) to the base of the protrusion; basal half thick, oriented in the same direction as the median line of the endophallus; apical half slender, strongly bent right laterally. Relative sizes of some lobes and protrusions are as follows: ventrobasal swelling ≤ swelling of ventrobasal surface of laterobasal lobes ≈ dorsobasal lobe <dorsoapical lobe
Author: Sasakawa, Kôji
Institution: Chiba University
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7084397357
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