Bryothinusa yoshigoui, Liu & Ono & Maruyama, 2021
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publication ID |
https://doi.org/ 10.37520/aemnp.2021.009 |
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publication LSID |
lsid:zoobank.org:pub:27EA8466-6B29-40F4-8236-DD49061C523B |
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persistent identifier |
https://treatment.plazi.org/id/03CB023B-AC00-FF8F-4C89-F9791502F8D8 |
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treatment provided by |
Carolina |
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scientific name |
Bryothinusa yoshigoui |
| status |
sp. nov. |
Bryothinusa yoshigoui View in CoL sp. nov.
( Figs 1E View Fig ; 2E View Fig ; 7 View Fig ; 22 View Fig )
(Japanese name: Hiroshima-nagisa-hanekakushi) Type material. Hඈඅඈඍඒඉൾ: J, JAPAN: HඈඇඌΗǕ: Mitsuguchi-kaigan, Yasuura-chô, Kure, Hiroshima-ken, 28.vii.2019, H. Yoshigou (KUM). Pൺ*©ൺඍඒඉൾඌ: HඈඇඌΗǕ: 6 JJ 1 ♀, 2 unsexed spec., same data as holotype (KUM, NMPC).
Description. Body ( Fig. 1E View Fig ) small about 2.3–2.4 mm long, covered with minute setae; background colour deep reddish brown, head, pronotum and elytra reddish brown; posteriorly abdominal tergite VI infuscate; antenna and legs similarly reddish-brown coloured, lightly paler than body colour and paler toward apex.
Head oval, wider than long, longer than pronotum and elytra; eyes ( Fig. 2E View Fig ) small, reniform, shorter than 1/2 of head length, with 12–14 facets; antennal length a little shorter than distance from anterior margin of head to posterior margin of elytra; antennal segments all longer than wide; segment I as long as II, 1.2 times longer than III, and shorter than XI; posterior margin of antennal segment III narrower than anterior margin.
Mouthparts ( Figs 7 View Fig A-E) with distribution of labral setae as in Figure 7A View Fig ; mandibles ( Fig. 7B View Fig ) elongate triangle, asymmetrical, right with median tooth; median tooth longer than 1/4 of mandibles; left mandible without tooth, blunt at apex; maxilla with apical margin of lacinia ( Fig. 7C View Fig ) with second spines very small and not obvious, at tip with two spines not closely interdigitating; 4 setae on inner margin of lacinia; labial palpus ( Fig. 7D View Fig ) with most setae located basally; mentum ( Fig. 7E View Fig ) with antero-lateral angles prolonged into spinose processes; anterior margin deeply truncate; small “v seta” of mentum near the level of anterior margin.
Pronotum almost as long as elytra, slightly narrower than head.
Elytra widened apically, wider than long, almost as wide as pronotum; hind wings absent.
Male abdominal sternite VIII ( Fig. 7F View Fig ) with posterior margin slightly serrate. Median lobe of aedeagus ( Figs 7H, I View Fig ) with some granules on apical lobe, and not clearly visible in dorsal view; paramere elongate, as in Figure 7J View Fig .
Female abdominal sternite VIII ( Fig. 7G View Fig ) with posterior margin slightly serrate but smoother than in male. Spermatheca ( Fig. 7K View Fig ) small, simplified in shape, about half times coiled near base.
Measurements. BL 2.30–2.40, FBL 1.00–1.20, HL 0.38– 0.45, HW 0.43–0.48, PL 0.35–0.38, PW 0.40–0.43, EL 0.35–0.38, EW 0.41–0.43, HTL 0.34–0.39, AL 0.88–0.97, AS-I 0.09–0.10, AS-II 0.09–0.10, AS-III 0.07–0.08.
Differential diagnosis. In general appearance, the species is closely similar to B. tsutsuii , B. algarum , B. koreana and B. japonica , in but easily distinguished from B. tsutsuii and B. algarum by the spermathecal shape and the median lobe of the aedeagus with granule-like projections, from B. koreana at the number of facets and the darker body colour, and from B. japonica by the apical part of spermatheca without granule-like projections.
Distribution. Japan (Honshû: Hiroshima).
Etymology. This new species is named after Mr. Hidenori Yoshigou, a famous ichthyologist and the collector of the type series.
Remarks. The specimens were collected on the coastline of Setonaikai (inland sea between Honshû and Shikoku), Japan. A distribution map of examined specimens of this species in Japan is illustrated in Figure 22 View Fig .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.