Macronotops biserratus Qiu, Xu & Chen, 2019

Qiu, Jian-Yue, Xu, Hao & Chen, Li, 2019, A revision of the rare flower beetle genus Macronotops Krikken (Coleoptera: Scarabaeidae: Cetoniinae) from Asia with biological notes, Zootaxa 4556 (1), pp. 1-65 : 8-9

Macronotops biserratus Qiu, Xu & Chen new species

( Figs. 1 , 24 , 48 , 72–73 , 111 , 123 , 135–136 , 203 , 258 )

Type material. LAOS: ♂ (Holotype, SWU), VI.2014, Mount Phu Pane , Hua Phan Prov., 2,060 m; Paratypes (2♂♂): 1♂ ( QCCC), VI.2014, Mount Phu Pane , Hua Phan Prov., 2,060 m ; 1♂ ( KSCJ), 10–21.VI.2010, Phou Pan (Mt.), Houa Phan Prov., St. Jakl .

Holotype (male). General: Body length 18.0 mm; width 8.0 mm, widest at humeral umbone, gradually narrowed backward. Body brown. Surface with fulvous, brown, light yellow and black setae, and yellow tomentous maculae. Head: Dorsal surface with dense, setiferous punctures; setae fulvous, short. Clypeus with week green metallic reflections; anterior margin nearly straight and slightly raised; clypeolateral ridge not distinct. Frons with a slightly raised longitudinal ridge ( Fig. 1 ). Maxillary palpus and labial palpus brown. Antenna brown, antennal club long, about 1.5 times length of antennomeres 2–7 combined; inner side of antennomere 8 with short, dense, fulvous setae ( Fig. 1 ). Ventral surface clad with long, orange setae ( Fig. 136 ). Pronotum: Widest at base, basomedian area depressed. Lateral margin curved; posterior margin distinctly protruded. Surface clad with short, reddish-brown setae except for basolateral area; basolateral area clad with long, black and light yellow setae ( Fig. 135 ). Scutellum: Surface clad with short, sparse, black setae. Elytron: With posthumeral macula, lateral macula, median macula, and distal macula; median macula and distal macula small. Surface densely clad with setae; setae light yellow on maculae; setae black behind humeral umbone and on lateral and distal declivity; setae dark brown on juxtascutellar area; setae long, fulvous on disc; setae fulvous along lateral margins; humeral umbone glabrous ( Fig. 135 ). Mesepimeron: Dark brown, clad with light yellow and dark brown setae. Metepisternum and metepimeron: Dark brown, clad with dark brown and black setae. Sternum: Preprosternum dark brown, almost glabrous. Mesosternum black, clad with long, sparse, light yellow setae. Mesometasternal process short, glabrous, brown, apex rounded; mesometasternal suture depressed, clad with long, yellow setae. Metasternum black, with long, sparse, yellow and brown setae; middle portion glabrous ( Fig. 136 ). Pygidium: Dark brown. Surface clad with short, dense, fulvous and black setae; setae fulvous in middle ( Figs. 72 , 135 ). Abdomen: Without median groove. Six abdominal sternites visible; sternites II–V clad with yellow setae; setae on sternite II long, dense; setae on sternites III–V short, sparse, but longer on sides; setae near posterior margin of sternite VI long, orange; sternite VII with sparse, short, fulvous setae on sides. Sternites II–V with a small, indistinct yellow macula close to posterior margin on each side; densely clad with fulvous and black setae in dorsal and lateral portion ( Fig. 136 ). Legs: Slender, simple. Metacoxa brown; clad with long, orange and yellow setae. Femora and tibia reddish-brown; clad with long, orange and yellow setae. Tiny teeth between 3 large teeth of protibia distinct ( Fig. 25 ); spine near the middle of outer margin of mesotibia sharp, but blunt in metatibia; metatibia with a row of dense, brush-like, orange setae along inner margin ( Figs. 135–136 ); dorsal tooth of metatibia longer than basitarsus of metatarsus, outer tooth small and short ( Fig. 48 ). Tarsi reddish-brown; basitarsus of metatarsus with a cluster of sparse, long setae ( Fig. 48 ). Genitalia: Parameres narrow, long; apex rounded, slightly expanded. Interparameral split wide; base with membrane, distinctly divided in medial. Median lobe ribbon-like; distinctly longer than paramere ( Fig. 111 ).

Female. Unknown.

Variability. Pygidium of the male paratype with a distinct yellow macula ( Fig. 73 ).

Differential diagnosis (male). Length of clypeus almost equal to width. Antenna brown ( Fig. 1 ). Elytra dark brown, with posthumeral maculae, median maculae, lateral maculae and distal maculae ( Fig. 135 ). Pygidium with numerous black setae ( Fig. 72 ). Abdominal sternites II–V with a small or indistinct, yellow maculae on each side ( Fig. 136 ); male abdomen without median groove. Protibia with tiny teeth ( Fig. 24 ); dorsal tooth of metatibia longer than basitarsus of metatarsus ( Fig. 48 ).

This new species is similar to M. vuilleti , but can be separated by male protibia with several tiny teeth ( Fig. 24 ), numerous black setae on pygidium ( Fig. 72 ), distinctly longer legs ( Figs. 135–136 ), elongated parameres, wider median lobe, and distinctly divided membrane ( Fig. 111 ).

Etymology. The species name “ biserratus ” is a combination of the Latin words “ bi ” meaning “double”, and “ serratus ” meaning “serrated”, since this species is similar to M. vuilleti , but the protibia bear distinct tiny teeth between the three large teeth.

Distribution. Laos.

Remarks. This species occurs sympatrically with M. vuilleti at Mount Phu Pane, Laos, and these two species are very similar, but several morphological differences (see differential diagnosis section) are observed, especially in tiny teeth and male genitalia which are stable diagnostic characters of this genus.

Figures

FIGURES 1–23. Head of Macronotops (male in left, female in right). 1, M. biserratus new species; 2–3, M. dianensis new species; 4–5, M. fulvoguttatus; 6–7, M. fulvopilosus; 8–9, M. miksici new species; 10–11, M. nigropubescens; 12–13, M. olivaceofuscus; 14–15, M. sexmaculatus; 16–17, M. vuilleti; 18–19, M. curvimarginatus; 20–21, M. medogensis new species; 22–23, M. ovaliceps. Arrows emphasize the length of antenna club.

FIGURES 24–47. Protibia of Macronotops (male and female). 24, M. biserratus new species; 25–26, M. dianensis new species; 27–28, M. fulvoguttatus; 29–30, M. fulvopilosus; 31–32, M. miksici new species; 33–34, M. nigropubescens; 35–36, M. olivaceofuscus; 37–38, M. sexmaculatus; 39–40, M. vuilleti; 41, Macronotops sp.; 42–43, M. curvimarginatus; 44–45, M. medogensis new species; 46–47, M. ovaliceps. Arrows indicate the angle between large teeth and the outer margin of protibia.

FIGURES 48–65. Metatibia and basitarsus of metatarsus of the Macronotops sexmaculatus species group (male in left, female in right). 48, M. biserratus new species; 49–50, M. dianensis new species; 51–52, M. fulvoguttatus; 53–54, M. fulvopilosus; 55–56, M. miksici new species; 57–58, M. nigropubescens;59–60, M. olivaceofuscus; 61–62, M. sexmaculatus; 63–64, M. vuilleti; 65, Macronotops sp. Red arrows indicate the difference in the dorsal and outer tooth of the metatibia in females; yellow arrows indicate the difference in the dorsal and outer tooth of the metatibia in males; blue arrows indicate the density of setae on the basitarsus of the metatarsus.

FIGURES 72–98. Pygidium of the Macronotops sexmaculatus species group (size of macula and color of setae). 72–73, M. biserratus new species; 74–75, M. dianensis new species; 76–79, M. fulvoguttatus; 80–83, M. fulvopilosus; 84–85, M. miksici new species; 86–89, M. nigropubescens; 90–91, M. olivaceofuscus; 92–93, M. sexmaculatus; 94–97, M. vuilleti; 98, Macronotops sp.

FIGURES 111–122. Male genitalia of Macronotops (apical view). 111, M. biserratus new species; 112, M. dianensis new species; 113, M. fulvoguttatus; 114, M. fulvopilosus; 115, M. miksici new species; 116, M. nigropubescens; 117, M. olivaceofuscus; 118, M. sexmaculatus; 119, M. vuilleti. 120, M. curvimarginatus; 121, M. medogensis new species; 122, M. ovaliceps. Arrows indicate the membrane between the parameres.

FIGURES 122–134. Male genitalia of Macronotops (lateral view). 123, M. biserratus new species; 124, M. dianensis new species; 125, M. fulvoguttatus; 126, M. fulvopilosus; 127, M. miksici new species; 128, M. nigropubescens; 129, M. olivaceofuscus; 130, M. sexmaculatus; 131, M. vuilleti; 132, M. curvimarginatus; 133, M. medogensis new species; 134, M. ovaliceps.

FIGURES 135–136. Habitus of Macronotops biserratus new species (dorsal and ventral view). Male holotype.

FIGURES 203–214. Habitus of Macronotops (male in left, female in right; oblique view). 203, M. biserratus new species; 204, Macronotops sp.; 205–206, M. dianensis new species; 207–208, M. fulvoguttatus. 209–210, M. fulvopilosus; 211–212, M. miksici new species; 213–214, M. nigropubescens.

FIGURES 258–260. Known distribution of Macronotops. 258, Distribution for the whole genus; 259, map of SE Xizang, China; 260, map of W Sichuan, China. Syncretic markers indicate identical or very close localities; type localities of the known species are underlined, that of M. olivaceofuscus is missing because the precise type locality is unknown.