Zeugophora gracilis unicolor Chûjô, 1958

Takemoto, Takuya, 2019, Revision of the genus Zeugophora (Coleoptera, Megalopodidae, Zeugophorinae) in Japan, Zootaxa 4644 (1), pp. 1-62 : 50-53

publication ID	https://doi.org/ 10.11646/zootaxa.4644.1.1
publication LSID	lsid:zoobank.org:pub:02543A03-07E4-4F82-9372-CE85EBC99ABF
persistent identifier	https://treatment.plazi.org/id/03C38C25-407A-FD0B-FF3B-FC6AFDD5A29C
treatment provided by	Plazi
scientific name	Zeugophora gracilis unicolor Chûjô, 1958
status

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Zeugophora gracilis unicolor Chûjô, 1958 View in CoL

[Japanese name: Kiiro-momobuto-hamushi]

( Figs 30 View FIGURE 30 G–I; 39–43)

Zeugophora gracilis unicolor Chûjô, 1958 View in CoL [type locality: Okinawa Is. Yurudji]; Takizawa, 2006: 2 [listed].

Zeugophora (Pedrillia) gracilis unicolor: Chûjô & Kimoto, 1961:119 View in CoL [Ryukyu Is. Okinawa]; Kimoto, 1964: 109 [Ryukyu Is. Okinawa]; Kimoto & Takizawa, 1994: 99, 267 [ Japan:Ryukyu Is.]; Silfverberg, 2010: 335 [listed].

Description. Measurement. Body length: female, PL, 0.71–0.79 mm; PEL, 2.87–3.20 mm. Width: HW, 0.75–0.78 mm; PW, 0.83–0.92 mm; PPW, 0.70–0.77 mm; EW, 1.15–1.31 mm. Biometric data are given in Table 9.

Coloration. Body testaceous. Apex of mandible black. Antenna brown except for first and second segments.

Habitus. Body oblong.

Head ( Fig. 40A View FIGURE 40 ) with reticulate coriaceous microsculpture, covered with sparse setiferous punctures; setae produced from inside puncture ( Fig. 41A View FIGURE 41 ); furnished with longitudinal grooves from temples to frontoclypeal suture (fig. 40A); frontoclypeal suture bisinuate, middle portion wide, about half width of clypeus; labrum and clypeus convex and furnished with setae; length of clypeus longer than that of labrum. Apex of mandible bifurcate and furnished with two teeth apically on inner margin, lateral angles furnished with setae ( Fig. 39D View FIGURE 39 ). Canthus large, acutely triangular with apex rounded, and densely furnished with setiferous punctures. Antennal segments short, except for first, third and fourth which are long and slender, eleventh segment pointed; all segments setous, fifth through eleventh with shorter, denser setae ( Fig. 39C View FIGURE 39 ).

Pronotum ( Fig. 39A View FIGURE 39 , 40B View FIGURE 40 ) with blunt lateral tubercles, tapered towards base; groove of anterior margin distinctly impressed a narrow distance from margin; posterior marginal groove undulate; lateral basal angles weakly swollen and with two to five long setae near base; surface regularly convex and with reticulate coriaceous microsculpture, densely covered with coarse setiferous punctures ( Fig. 41B View FIGURE 41 ); distance between punctures in central portion 0.5–3.0 times their own diameter, denser laterally. Setae produced from inside punctures ( Fig. 41B View FIGURE 41 ).

Elytra long, leaving apex of pygidium exposed, moderately vaulted in lateral view; lateral sides subparallel; dorsal surface with reticulate coriaceous microsculpture ( Fig. 41D View FIGURE 41 ), densely covered in setiferous punctures, punctures as coarse as on pronotum and separated by 1–3 times their diameter; setae produced from anterior inner margin of puncture ( Fig. 41D View FIGURE 41 ); sutural and lateral grooves complete from elytral base to apex; basal areas of elytra weakly convex on either side of suture; humerus protruding anteriorly; epipleuron narrow. Scutellum trapezoidal, with setae.Disc of mesoventrite furnished with few setae and without punctures; process densely furnished with setiferous punctures ( Fig. 39B View FIGURE 39 , 40C View FIGURE 40 ). Mesepisternum furnished with setiferous punctures ( Fig. 37B View FIGURE 37 , 38C View FIGURE 38 ). Surface of metaventrite with reticulate coriaceous microsculpture ( Fig. 41C View FIGURE 41 ), central area covered with setiferous punctures, becoming denser on lateral areas, setae produced from inside punctures ( Fig. 41C View FIGURE 41 ). Surface of sternites with reticu- late coriaceous microsculpture, sparsely covered with setiferous punctures. In male, posterior margin of 7th sternite evenly curved ( Fig. 40D View FIGURE 40 ). In female, posterior margin of 7th sternite straight, but bisinuate on central portion ( Fig. 40D View FIGURE 40 ).

Legs furnished with setae; tibial setae becoming longer and denser apically. Hind femora thickened. Tibiae straight; mid and hind tibiae with sharp and fine crenulated carina along external face. Apex of protibia with one spur; apices of meso- and metatibiae with two spurs. Tarsi distinctly shorter than tibiae, and basal three segments gradually widened apically.

Male genitalia as shown in Fig. 42 View FIGURE 42 A–F: 8th sternite furnished with setae, cylindrical, membrane long, allowing for posterior horizontal extension ( Fig. 42E, F View FIGURE 42 ); apex of spiculum three branched, central branch furnished with tiny setae ( Fig. 42D View FIGURE 42 ); median struts of median lobe approximately 5.0 times as long as median lobe ( Fig. 42A View FIGURE 42 ); apex of median lobe pointed ( Fig. 29B View FIGURE 29 ); paramere somewhat developed ( Fig. 42C View FIGURE 42 ).

Spermatheca as shown in Fig. 42 View FIGURE 42 .

Host plant. Unknown.

Remarks. Chûjô (1958) designated 9 cotypes as syntypes in his original description, therefore, I designated one male specimen (18-tt-274) as the lectotype ( Fig. 43 View FIGURE 43 ), and the other 8 specimens (18-tt-263, 267–273) become paralectotypes.

There have been few records of this species since its original description.

Types. Lectotype ♂ ( KUM): "Yurudji, IS. OKINAWA, LOO-CHOO, 26.V.1958, COLL. K. IHA.", "Cotype.", " Zeugophora gracilis unicolor CHÛJÔ , Det. M. CHUJO, 1958.", "18-tt-274, ex. by T. Takemoto, SEHU, Japan." . Paralectotypes 3 ♂ ( KUM): same data but specimens number label different, "18-tt-272, ex. by T. Takemoto, SEHU, Japan."; "18-tt-273, ex. by T. Takemoto, SEHU, Japan."; "18-tt-274, ex. by T. Takemoto, SEHU, Japan." ; 4 ♀ ( KUM): same data but specimens number label different, "18-tt-267, ex. by T. Takemoto, SEHU, Japan."; "18- tt-268, ex. by T. Takemoto, SEHU, Japan."; "18-tt-269, ex. by T. Takemoto, SEHU, Japan."; "18-tt-270, ex. by T. Takemoto, SEHU, Japan."; "18-tt-271, ex. by T. Takemoto, SEHU, Japan." .

Specimens examined. Japan. Okinawa Pref.: 1 ex., Yona , 10.IV.1975, N. Ogura leg. ( SIPC) ; 3 exs., Kunigami, Mt. Yonaha-dake , 5.IV.1986, Y. Matsuda leg. ( MMPC) .

Distribution. Japan: Okinawa Pref.