Monolepta sauteri Chûjô, 1935

Lee, Chi-Feng, 2009, A taxonomic revision of Monolepta pallidula species group in Taiwan (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 2170, pp. 15-27 : 24-25

publication ID	https://doi.org/ 10.5281/zenodo.189193
DOI	https://doi.org/10.5281/zenodo.6224108
persistent identifier	https://treatment.plazi.org/id/039D1172-FFD4-FFBC-2EA0-FE0A14C95593
treatment provided by	Plazi
scientific name	Monolepta sauteri Chûjô, 1935
status

Treatment

Monolepta sauteri Chûjô, 1935: 173 ; Chûjô, 1938: 144; Chûjô, 1962: 134; Chûjô, 1963b: 394; Kimoto, 1965: 488; Kimoto, 1966: 31; Kimoto, 1969: 49; Kimoto, 1987: 189; Kimoto, 1989: 255; Kimoto, 1991: 15; Takizawa et al., 1995: 11.

Description. Total length: males: 7.0– 7.6 mm (O: 7.37 mm; n= 6); females: 6.5–8.1 mm (O: 7.22 mm; n= 6). General color yellowish-brown ( Figs. 7–8 View FIGURES 1 – 10 ); antenna blackish-brown but two or three basal antennomeres yellowish-brown; clypeus, labium, and mandibles black; metasternum and metepisternum brown; tibia and tarsi black; scutellum, basal margin, suture of elytron black; black basal margin extending laterally into basal 2/5 of lateral margin. Antennomeres 4–10 about 4.0 times longer than broad at apex ( Fig. 29 View FIGURES 27 – 32 ); length of second to third antennomere 0.68–0.82 (O: 0.76); length of third to fourth antennomere 0.41–0.53 (O: 0.47) ( Fig. 28 View FIGURES 27 – 32 ). Pronotal length to width 0.67–0.75 (O: 0.72). Maximal width of elytra to length of elytra 0.63–0.69 (O: 0.65). Length of basi-metatarsus to metatibia 0.47–0.53 (O: 0.50).

Male genitalia ( Fig. 27 View FIGURES 27 – 32 ). Median lobe broad, sub-parallel; apex truncate; with a median longitudinal groove on tectum, extending to base of median lobe, weakly sclerotized inside groove. Tectum narrow and short, about 0.35x as long as median lobe, parallel-sided. Ventral surface well sclerotized, with a groove from apex to apical 1/3. Endophallus with dorsal spiculae near dorsal groove; median spiculae articulated with five pairs of curved sclerites; two ventral spiculae consisting of dense and small teeth.

Female genitalia. Spermathecal cornu ( Fig. 30 View FIGURES 27 – 32 ) slender, moderately curved; middle part long, medially curved, abruptly narrowed near cornu; nodulus slender, indistinctly delimited from middle part; proximal spermathecal duct long, larger near nodulus, loosely and apically coiled. Dorsal part of bursa-sclerites ( Fig. 31 View FIGURES 27 – 32 ) with one erected process, apex consisting of two rows of teeth; ventral part ( Fig. 32 View FIGURES 27 – 32 ) very slender, with one row of teeth at apex.

Type material examined. Holotype 3, Kuraru (= Kenting National Park, Pingtung), FORMOSA, 15.V.1933, leg. Y. Miwa (2328) ( TARI); allotype (2329) and 8 paratypes (43, 4ƤƤ), same data as holotype (2579, 2842-2843, 2863-2867) ( TARI), one paratype with same data deposited at the DEI.

Specimens examined. 43, Kuraru (= Kenting National Park, Pingtung), 15.VI.1933, leg. Y. Miwa; 1Ƥ, same locality and collector, 21–25.VII.1932; 2ƤƤ, same locality, 13.VI.1937, leg. M. Chujo; 2ƤƤ, Chipon (Chihpen, Taitung), 25.III.1935, leg. M. Chujo; 2ƤƤ, Mizuho (= Juisui, Hualien), 23.III.1935, leg. M. Chujo; 13, 2ƤƤ (#4440-4442), Taoyuan, Hsiaowulai, 19.IV.2008, leg. S.-F. Yu; 1Ƥ (#609), Teipei, Hsintien, 29.I.2007, leg. H.-C. Chen; 1Ƥ (#3640), Pingtung, Shuangliu, 02.II.2008, leg. S.-F. Yu; 13 (#845), Pingtung, Tahanshan, 22.II.2007, leg. S.-F. Yu (all in TARI).

Diagnosis. Monolepta sauteri and M. kuroheri differ from M. gracilipes and M. tsoui by the combination of the following characters: the wider antenna ( Figs. 29 View FIGURES 27 – 32 , 35 View FIGURES 33 – 38 ) (antennomeres 4–10 about 4.0 times longer than broad) in contrast with narrower antenna ( Figs. 13 View FIGURES 11 – 16 , 26 View FIGURES 21 – 26 ) (antennomeres 4–10 about 5.5–6.2 times longer than broad) in M. gracilipes and M. tsoui ; black lateral margin of elytron abbreviated near apex ( Figs. 8, 10 View FIGURES 1 – 10 ). Monolepta sauteri can be distinguished from M. kuroheri by the shorter black lateral margin of the elytra (from base to basal 2/5) ( Fig. 8 View FIGURES 1 – 10 ), by contrast with from base to basal 4/ 5 in M. kuroheri ( Fig. 10 View FIGURES 1 – 10 ); the less impressed ventral groove of median lobe ( Fig. 27 View FIGURES 27 – 32 b), by contrast with the prominent ventral groove in M.

kuroheri ( Fig. 33 View FIGURES 33 – 38 b); and presence of dorsal endophallic sclerites and one apically articulated median endophallic sclerite, by contrast with absence of the dorsal endophallic sclerites and four separate median endophallic sclerites. Kimoto (1966) indicated that the smaller body and narrowed black margin of the elytron of Monolepta kuroheri can be separated from M. sauteri . Actually both characters are too variable to have diagnostic value. Kimoto and Takizawa (1997) tried to use relative lengths of black lateral margin of the elytron to identify both species but the description is not correct probably because of old specimens. Actually, they can be distinguished by relative lengths of black margin of the elytra mentioned above.

Distribution. Taiwan.