Clinterocera vietnamensis Xu & Qiu, 2018

Xu, Hao, Qiu, Jian-Yue & Huang, Guo-Hua, 2018, Taxonomy and natural history of the myrmecophilous genus Clinterocera Motschulsky, 1858 (Coleoptera: Scarabaeidae: Cetoniinae) from China and adjacent regions: revision of the C. jucunda species group, Zootaxa 4531 (3), pp. 301-352 : 338-339

Clinterocera vietnamensis Xu & Qiu , new species

( Figs. 20–21 , 35 , 54–55 , 76–77 , 126–127 , 143 , 175 , 180 )

Differential diagnosis. This remarkable species is similar to C. davidis and C. jucunda , but can be readily distinguished by its distinctly thick male tarsi ( Fig. 35 ), short and blunt spurs ( Fig. 54 ), and uniquely-shaped parameres ( Fig. 76 ).

Holotype (male). General: Body length 21.6 mm; width 8.2 mm. Body black, elytra largely red. Body surface with numerous setiferous punctures; setae yellow, stubble like. Head, pronotum, elytral declivity, and pygidium covered with thin, khaki tomentum ( Fig. 126 ). Head: Clypeus apical margin raised, frons evenly convex; with dense fine, setiferous punctures; punctures elliptic behind clypeal apex, rounded on frons; setae short. Surface of frons slightly tomentous. Antennal scapus strongly expanded, subflabellate; exterior surface tomentous, with dense, minute, setiferous punctures, setae short; interior surface with many setiferous punctures in margins, setae slender. Mouthparts: Prementum extremely expanded, scutellate; exterior surface matt, with dense, semicircular, setiferous punctures; setae short ( Fig. 127 ). Pronotum: Subcircular, margins slightly raised; anterior margin almost straight, slightly convex in medial in dorsal view; disc with dense, minute, rounded arcuate-striolate, setiferous punctures; punctures denser in lateral portion; setae slender ( Fig. 20 ). Surface slightly tomentous, thicker in lateral portion. Scutellum: Subtriangular. Surface tomentous, with sparse, fine, arcuate-striolate, setiferous punctures; setae short. Elytra: Subrectangular; disc red, juxtascutellar area and elytral declivity black. Surface with sparse, fine, elliptic, arcuate-striolae setiferous punctures, denser in elytral declivity; setae slender ( Fig. 21 ). Disc without tomentum; elytral declivity with distinct lateral tomentous band; posthumeral tomentous spot absent, and lateral tomentous spot on the middle of elytral declivity small, indistinct ( Fig. 143 ). Metepisternum and metepimeron: Surface tomentous, with dense, arcuate-striolate, setiferous punctures; setae short. Sternum: Preprosternal apophysis robust, slightly reflexed, with cluster of long setae on the apex. Metasternum without tomentum; surface with dense, arcuate-striolate, setiferous punctures in lateral portion; punctures rounded in middle portion; setae short ( Fig. 127 ). Abdomen: Shallow, longitudinal groove between abdominal sternites III–V. Abdominal sternites surface with dense, fine, arcuate-striolate, setiferous punctures, and sparse, fine, annulatestriolate, setiferous punctures; setae short. Surface almost without tomentum, posterior margin of sternite II–V slightly tomentous ( Fig. 127 ). Propygidium surface tomentous, with dense, setiferous punctures; setae short; terminal spiracla distinctly protruding. Pygidium: Distinctly convex. Surface heavily tomentous, with fine, round, setiferous punctures; setae short. Legs: Surface with dense, fine, sinuous striolae and arcuate, setiferous punctures; setae short. Tibiae distinct thick. Protibia with a small, external denticle in apical portion; an indistinct, blunt protrusion near middle of outer margin; apical tooth of inferior ridge robust, tapering, curved downwards ( Fig. 35 ). Mesotibia and metatibia with a small, acute protrusion near middle of outer margin; three distinct, acute protrusions in distal portion; two spurs robust, blunt ( Fig. 54 ). Coxa, trochanter, anterior side of profemora, posterior side of mesofemora and metafemora, dorsal side of tibiae with sparse tomentum. Tarsi with 4 tarsomeres, distinct thick ( Figs. 35 , 54 ); propretarsi short, blunt. Parameres: Elongate, robust, outer margins nearly parallel, apex obtuse in apical view; interparameral split slightly widened ( Figs. 76–77 ).

Allotype (female). Body length 21.6 mm; width 8.4 mm. Similar to the holotype ( Fig. 175 ), but lateral tomentous spot absent, and tarsi distinctly slender ( Fig. 55 ).

Other paratypes (females). Body length 22.5 mm; width 8.5 mm. Similar to allotype.

Type material. Holotype: ♂ (HUNAU), II.2015, Mount Ba Na , Da Nang, C. VIETNAM, 1450 m, Van Dang leg. Paratypes (3♀♀): 1♀ (Allotype, HUNAU), 1.VII.2015, Hon Ba Nature Reserve , Nha Trang, Khanh Hoa province, C. VIETNAM, Van Dang leg. ; 1♀ ( QCCC), V.2017, Ha Tinh, C. VIETNAM, native leg. LAOS : 1♀ ( KSCJ), VIII.2005, Lak Sao .

Etymology. The species name “ vietnamensis ” refers to the country of origin of the holotype.

Distribution. Vietnam, Laos.

Natural history. Unknown.

Figures

FIGURE 180. Known distribution of the Clinterocera jucunda species group (inset map shows the distribution of C. heinrichi). Some records and collecting sites are not shown because there is no precise geographical information.

FIGURES 6–27. Setiferous punctures on the pronotum and elytron of Clinterocera. 6–7, Clinterocera brevifasciata new species (holotype); 8–9, C. davidis; 10–11, C. donckieri; 12–13, C. jucunda; 14–15, C. krikkeni new species (holotype); 16–17, C. nigra; 18–19, C. velutina new species (holotype); 20–21, C. vietnamensis new species (holotype); 22–23, C. yunnana; 24– 25, C. raui; 26–27, C. sinensis new species (holotype).

FIGURES 28–38. Protibia and protarsi of Clinterocera (male). 28, Clinterocera brevifasciata new species (holotype); 29, C. davidis; 30, C. donckieri; 31, C. jucunda; 32, C. krikkeni new species (holotype); 33, C. nigra; 34, C. velutina new species (holotype); 35, C. vietnamensis new species (holotype); 36, C. yunnana; 37, C. raui; 38, C. sinensis new species (holotype).

FIGURES 39–61. Metatibia and metatarsi of Clinterocera (male and female). 39. Clinterocera bicolor; 40–41, C. brevifasciata new species (holotype and paratype); 42–43, C. davidis. 44–45; C. donckieri; 46–47, C. jucunda; 48–49, C. krikkeni new species (holotype and paratype); 50–51, C. nigra; 52–53, C. velutina new species (holotype and paratype); 54– 55, C. vietnamensis new species (holotype and paratype); 56–57, C. yunnana; 58–59, C. raui; 60–61, C. sinensis new species (holotype and paratype).

FIGURES 62–83. Male genitalia of Clinterocera (apical and lateral view). 62–63, Clinterocera brevifasciata new species (holotype); 64–65, C. davidis; 66–67, C. donckieri; 68–69, C. jucunda; 70–71, C. krikkeni new species (holotype); 72–73, C. nigra; 74–75, C. velutina new species (holotype); 76–77, C. vietnamensis new species (holotype); 78–79, C. yunnana; 80–81, C. raui; 82–83, C. sinensis new species (holotype).

FIGURES 112–135. Male habitus of Clinterocera (typical form), dorsal and ventral view. 112–113, Clinterocera brevifasciata new species (holotype); 114–115, C. davidis (Fujian, China); 116–117, C. donckieri (Guizhou, China); 118–119, C. jucunda (Chiang Rai, Thailand); 120–121, C. krikkeni new species (holotype); 122–123, C. nigra (Taiwan); 124–125, C. velutina new species (holotype); 126–127, C. vietnamensis new species (holotype); 128–129, C. yunnana (Yunnan, China); 130–131, C. ishikawai (paratype); 132–133, C. raui (Hua Phan, Laos); 134–135, C. sinensis new species (holotype).

FIGURES 136–147. Male habitus of Clinterocera (typical form), oblique view. 136, Clinterocera brevifasciata new species (holotype); 137, C. davidis (Fujian, China); 138, C. donckieri (Guizhou, China); 139, C. jucunda (Chiang Rai, Thailand); 140, C. krikkeni new species (holotype); 141, C. nigra (Taiwan); 142, C. velutina new species (holotype); 143, C. vietnamensis new species (holotype); 144, C. yunnana (Yunnan, China); 145, C. ishikawai (Ryukyu, Japan, paratype); 146, C. raui (Hua Phan, Laos); 147, C. sinensis new species (holotype).

FIGURES 165–179. Habitus of Clinterocera (variation). 165–166, Clinterocera krikkeni new species (Guizhou, paratypes); 167–172, C. nigra (Taiwan, 169–171 photograph by Yi-Chia Qiu, greasy); 173–174, C. velutina new species (Hainan, China, allotype and paratype); 175, C. vietnamensis new species (Nha Trang, Vietnam, allotype); 176, C. yunnana (Yunnan, China); 177, C. yunnana (Guizhou, China); 179, C. yunnana (Hubei, China); 179, C. sinensis new species (Zhejiang, China, paratype).