Bryothinusa aikoae, 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-AC1F-FF9A-4C9A-FC66155FFC18 |
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treatment provided by |
Carolina |
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scientific name |
Bryothinusa aikoae |
| status |
sp. nov. |
Bryothinusa aikoae View in CoL sp. nov.
( Figs 1L View Fig ; 2L View Fig ; 14 View Fig ; 21B View Fig ; 22 View Fig )
(Japanese name: Hime-nagisa-hanekakushi) Type material. Hඈඅඈඍඒඉൾ: ♀, JAPAN: HඈඇඌΗǕ: Mouth of Obitsu-gawa, Kuroto, Kisarazu-shi, Chiba-ken, 12.iii.2009, H. Ono (KUM).Pൺ*©ൺඍඒඉൾඌ: HඈඇඌΗǕ: 3 ♀♀, same data as holotype (KUM); 1 ♀, same locality as holotype, 16.iii.2009, H. Ono (KUM).
Description. Body ( Fig. 1L View Fig ) small, about 1.5–1.8 mm in length, covered with minute setae. Basically brown, head darker than pronotum and elytra, pronotum and elytra similarly coloured, from lower part of posteriorly abdominal tergite V to upper part of tergite VII infuscate; antenna, mouthparts and legs similarly coloured, lightly paler than head colour and paler toward apex.
Head oval, wider than long, shorter than elytra; eyes ( Fig. 2L View Fig ) large, reniform, longer than 1/2 of head length, with 22–24 facets; antennal length little shorter than distance from anterior margin of head to posterior margin of elytra; segment I 1.4 times longer than II, almost 3 times longer than III, and longer than XI; antennal segments I–III and XI longer than wide, antennal segments IV–VI almost as long as wide, antennal segments VII–X wider than long.
Mouthparts ( Figs 14A–E View Fig ) with distribution of labral setae as in Figure 14A View Fig , with large and thick spiniform seta at antero-laterally; mandibles ( Fig. 14B View Fig ) elongate triangle, asymmetrical, right with median tooth; median tooth shorter than 1/4 of mandibles; left without tooth, blunt at apex; maxilla with apical apex of lacinia ( Fig. 14C View Fig ) with second spines small, at tip with two spines not closely interdigitating; 3 setae on inner margin of lacinia; labial palpus ( Fig. 14D View Fig ) with most setae located basally; mentum ( Fig. 14E View Fig ) with antero-lateral angles prolonged into spinose processes; anterior margin deeply truncate; small “v seta” of mentum slightly lower than level of anterior margin.
Pronotum shorter than elytra, wider than head.
Elytra subquadrate, almost as wide as pronotum; hind wings fully developed.
Male unknown.
Female abdominal sternite VIII in Figure 14F View Fig . Spermatheca ( Fig. 14G View Fig ) very small, simplified in shape, about one time coiled near base.
Measurements. BL 1.50–1.80, FBL 0.83–0.85, HL 0.23– 0.28, HW 0.31–0.32, PL 0.29–0.30, PW 0.34–0.35, EL 0.35–0.36, EW 0.35–0.36, HTL 0.28–0.30, AL 0.58–0.63, AS-I 0.10–0.11, AS-II 0.07–0.08, AS-III 0.03–0.04.
Differential diagnosis. The species is distinct based on the body colour and shape. In body size this species is close to B. minuta but easily distinguished from it by the number of facets and by the fully developed hind wings.
Etymology. This new species is named after Mrs.Aiko Ono for supporting the entomological life of her husband H. Ono, the second author of this paper.
Distribution. Japan (Honshû: Chiba-ken).
Remarks. The type series consists of only female specimens. The second author repeatedly searched for this species in the type locality, but no additional specimens were found. Nevertheless, we describe it because of its very distinct general appearance. This species was only found in Chiba-ken. 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.
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