Mawenzhena koreana J.H. Kim & Jung, 2019

Kim, Jihoon & Jung, Sunghoon, 2019, A new species of the genus Mawenzhena Alexis & Delpont (Coleoptera Scarabaeidae: Cetoniinae: Goliathini) from South Korea, Zootaxa 4671 (2), pp. 277-282 : 278-280

Mawenzhena koreana J.H. Kim & Jung , new species

( Figs. 1–2 )

Type material. Holotype, male ( CNU): 14.VII.2017, Jeongseon-gun , Gangwon-do, KOREA, 37°19’17.6”N, 128°36’49.7”E, 280 m, Jihoon Kim leg. Paratypes, 2 males, 3 females ( CNU): same data, but 21.VII.2018 .

Description of holotype (male). Body length 22.2 mm, width 10.5 mm. Body surface metallic green and red wine. Most areas clad with setae and punctures ( Figs. 1 A–C). Head: Dorsal surface with dense punctures and sparse setae; medial groove on dorsal surface extending to frons. Clypeus subrectangular; anterior margin slightly raised with a median depression; clypeolateral ridge distinct, straight. Eye canthus narrow. Mentum and external margin of maxilla with sparse, long setae. Gula dark wine, with pale yellow setae on lateral side. Antennomere 1 with sparse punctures; short, pale yellow setae on the posterior margin and distal margin. Antennomeres 2–7 with sparse, short setae. Club as long as the antennomeres 1–7, length 1.54 mm; antennomere 8 with short, pale yellow setae on the inner surface; antennomere 9 with three short, pale yellow setae on the lateral surface; antennomere 10 with sparse, short, pale yellow setae on outer surface. Pronotum: Subtrapezoidal, widest near posterior margin; lateral margin curved slightly, raised; latter half of midline and small area on posterior margin in front of scutellum without punctures; disc slightly convex, with slight depressions on the both sides; depressions on the basoparamedian angles; circular setiferous punctures transformed to short sinuous striolae from disc to margin ( Fig. 2A ); posterior angle rounded; pronotal epipleuron rough, with setae. Mesepimeron: The visible area with dense setae. Scutellum: Triangular, with about 60 setiferous punctures; dense setae in both anterior angles; apex sharp. Elytron: Lateral margin bordered to the apicosutural angle; posthumeral emargination distinct; sutural costa glabrous; two slight costae across the mediodiscal area and distally convergent; apicosutural angle acute with blunt apex two yellow maculae on the mediodical area connected; arched setiferous punctures (setae short) dense ( Fig. 2B ) and transformed to short, sinuous striolae from mediodical area to lateral margin; with pale yellow setae along the whole margin, dense on the posthumeral emargination, sparse on the other parts. Sternum: Preprosternum black, with pale yellow setae on the inner margin (brush-like) and lateral side. Mesometasternal process prominent, subtriangular, almost glabrous, with very few punctures and setae (indistinct); apex rounded with dense, long, pale yellow setation above. Metasternum with long setae and punctures except for medial area (very sparse); disc (medial area) red wine, with a slight midline; metepisternum with setae not longer than metasternum. Metepimeron surface glabrous, with brush-like, pale yellow setae on posterior margin. Abdomen: Red, with a longitudinal groove between abdominal sternites 2–6; median area of abdominal sternites 2–6 with sparse setae; abdominal sternites 2–5 with setae on the anterior margin except for groove; abdominal sternite 6 with brush-like setae on the whole anterior margin; abdominal sternite 7 with setae except for medial area. Pygidium: Bordered, rugose, with short setae; surface with strong depressions on the lateral sides ( Fig. 2C ). Legs: Procoxa with long, pale yellow setae. Mesocoxa and metacoxa with setae, setae longer toward external margin. Trochanter glabrous with dense, pale yellow setae on the external margin. Femora with sinuous striolae and setae. Tibiae with thick striolae, punctures, and short setae. Protibia with thick, pale yellow setae on the margins and inferior ridge; spur shorter than tarsomere 2; third external tooth very small. Mesotibia and metatibia with an external teeth on outer margin; bidentate external malleolus; with brush-like, pale yellow setae along inner margin; length of two spurs shorter than tarsomere 2. Tarsi with punctures and short setae. Genitalia: Elongate, slightly curved inward ( Fig. 3A ); anterior margin of the parameres almost straight; apex asymmetry, slightly depressed, with sparse, pale yellow setae and widened lateral margin ( Figs. 3 A–C).

Sexual dimorphism. Female body longer and wider ( Fig. 1 ); female clypeus wider and shorter; female antennae shorter and smaller; female legs shorter and wider; middle and proximal protibial teeth indistinct in male; abdomen with median groove in male, with slight and shallow midline in female abdominal sternites 3–5; abdominal sternite 7 longer and narrower in male.

Variability. Body length 21.5–23.7 mm in males, 22.3–25.2 mm in females. Body width 10.5–11.1 mm in males, 10.6–12.1 mm in females. Antennal club length 1.5–1.8 mm in males, 1.5–1.6 mm in females. Surface coloration varying from metallic green to red wine (each individual has a different intensity). Intensity of depressions of pygidium varied ( Figs. 2 C–E). Apex of parameres varied in the shape of margin and distribution of setae ( Figs. 3 C–E).

Differential diagnosis. Differentiated from Mawenzhena nitida by the pronotal nonpunctate area in front of scutellum narrow; setae on body surface distinct; length of apicoexternal tooth on the protibia exceeds the length tarsomere 2 in female; basomedian margin of metasternum straight (median depression in M. nitida ); anteroproximal margin of metacoxa widened (narrow in M. nitida ) anterior margin of parameres almost straight (apex distinctly protrudent in M. nitida ), with sparse, pale yellow setae.

Distribution. This species is known only from the type locality in Jeongseon-gun, South Korea.

Etymology. The name of the new species refers to Korea.

Natural history: All specimens were found on the ground beneath a cliff next to the Donggang River at 280 m (the elevation of the cliff is 300 m). They seem to fall from the cliff rather because we observed the adult activity on the branches of Mongolian Oak, Quercus mongolica Fisch. ex Ledeb. However, Feeding activities and immature individuals were not observed, and numerous Dicronocephalus adamsi Pascoe, 1863 and Protaetia famelica scheini (Mikšić, 1959) were found together. Most of the specimens were damaged, so it seems that adults active much ear- lier than the collecting date.

Figures

FIGURES 1A–F. Habitus of Mawenzhena koreana J.H. Kim & Jung, new species. A–C, male holotype; D–F, female paratype. Scale bar = 10.0 mm.

FIGURES 2A–E. Setiferous punctures and pygidia of Mawenzhena koreana J.H. Kim & Jung, new species. A, B, setiferous punctures on pronotum (A) and elytron (B) of the holotype; C–E, pygidium of the holotype (C) and female paratypes (D, E). Scale bar = 0.5 mm for Figs. 2A–B and 5.0 mm for Figs. 2C–E.

FIGURES 3A–E. Male genitalia of Mawenzhena koreana J.H. Kim & Jung, new species. A, B, parameres of the holotype in dorsal (A) and lateral (B) view; C–E, apex of parameres of the holotype (C) and two paratypes (D, E). Scale bar = 1.0 mm.