Clinterocera heinrichi Krikken

Krikken, J., 2016, First records of the cremastocheiline genus Clinterocera Motschulsky, 1858 from the Indonesian island of Sulawesi, with description of a new species (Coleoptera: Scarabaeidae: Cetoniinae), Zootaxa 4170 (2), pp. 393-400 : 395-400

Clinterocera heinrichi Krikken , new species

Figs. 1, 4 , 7, 10 , 13, 16–18, 21–22 .

Material examined. Holotype male from Central Sulawesi, with two original labels (printed):

“ SULAWESI TENGAH: \ Mt.Tambusisi , 4000’, \ 1˚39’S-121˚21’E. \ 3-13.iv.1980 ”, “ M.J.D. Brendell \ B.M. 1980-280”; relevant holotype label added. Additional specimens (not designated paratypes) : North Sulawesi: He- He , 500m, xii.1930, G. Heinrich, 1 male ; Southeast Sulawesi: Mt Tangke Salokko , 1500m, 1-15.i.1932, G. Heinrich, 1 female (all three in The Natural History Museum, London, United Kingdom). The localities of the two Heinrich specimens are indicated on maps in books on the collector’s Sulawesi expedition ( Heinrich 1943).

Description (holotype, male). Habitus (Fig, 1) robust, length 22 mm (with head bent down). Black, elytral base with small red marking; some parts shiny, others more matt; also with symmetric markings of distinct pale khaki tomentum, mainly on sides of pronotum and elytra, and on scutellum; also limited tomentum on ventral side and legs (pectoral parts, sides of abdomen, and femora). Pilosity abundant but inconspicuous, minute, brown, stubble-like.

Head surface ( Figs. 4 , 13 ) largely shiny, distinctly evenly convex, apical margin not reflexed (not concave in profile), and sides steep. Punctation dense, minute, superficially pustulate behind clypeal apex, rapidly becoming more distinct and annulate-striolate toward other parts of head. Eye-canthi with light tomentum, frons with indistinct dark band between eyes (looks like thin tomentum).

Pronotum ( Fig. 7 ) with dorsal outline virtually fully rounded, surface black, somewhat matt, lateral margins with light tomentum. Pronotal surface abundantly to densely arcuate-annulate-striolate. Scutellum tomentous, somewhat vaguely arcuate-striolate.

Elytral surface ( Fig. 7 ) largely black, disc generally evenly deplanate, with distinct indication of longitudinal juxtasutural striola at short distance along entire suture; humeral umbone more shiny than most of elytral surface, between umbone and scutellum a small red marking is present; elytral sides with pale tomentous band over most of lateral and caudal declivities. Elytral disc ( Fig. 17 ) with abundant to dense, mainly elliptic arcuate striolae, denser and coarser near lateral tomentous band, apparently finer and more annular in that band. Posthumeral elytral emargination distinct; apicosutural elytral angle ( Fig. 10 ) shortly rounded.

Expanded mentum ( Fig. 18 ) with exposed side minutely, evenly, densely, superficially punctate. Concave upper side of expanded antennal scapus finely rugulate-striolate. Preprosternal apophysis robust, obliquely directed forward, tapering, apex blunt (in profile). Tomentous markings laterally, almost entire underside of body black, largely shiny. Prosternal sides densely striolate-hemipunctate, each puncture with minute bristle. Mesoventral and metaventral surface densely set with distinct arcuate-striolate (hemi)punctures; metaventral disc deplanate, with distinctly impressed, narrow midline, striolate punctures less dense there, smaller; lateral metaventral elements with some tomentum.

Abdominal underside ( Fig. 18 ) largely shiny black (medially somewhat brown), medially concave (distinct in profile); ventrites with (medially) finely arcuate-striolate and (laterally) denser annulate-striolate punctation. Propygidium and abdominal ventrites laterally (near elytral edge) tomentous; pygidium ( Figs. 10 , 13 ) evenly convex, lightly tomentous, generally with strong, crowded annulate-striolate punctation; propygidial spiracles conically produced. Parameres robustly bilobate, interparameral split widened ( Figs. 21–22 ).

Protibia ( Fig. 16 ) with short, obtuse apico-external denticle and 1 obtuse, more proximal external denticle; underside with longitudinal ridge ending in robust, tapering, downward projection; terminal spur short; most of upper side densely punctate, more or less striolate. Mesotibiae and metatibiae with distinct external protrusion, their apex with 3 distinct protrusions, i.e., 2 simply acute and 1 internal dilated extension supporting pair of tapering spurs; tibial surface densely to crowdedly striolate-punctate(-rugulate), external side tomentous. All femora equally striolate-punctate; posterior side of mesofemora and metafemora with tomentum. Tarsi all with 4 short densely, finely punctate tarsomeres, protarsi distinctly thickset; claws short.

Head maximum width (tips of eye-canthi) 4.4 mm. Pronotum median length 5.1 mm, maximum width 6.3 mm. Elytra maximum (longitudinal) length approximately 13 mm, combined maximum width (at humeri) 9.0 mm.

Diagnosis, variation, sexual dimorphism (see all comparative figures). The distribution of tomentous markings on the holotype along the sides of the pronotum and elytra serves to tentatively distinguish this species from other known Clinterocera , i.e., the taxa reported from the western mainland and nearby islands. Males have a long projection on the protibial underside, near the insertion of the compacted tarsus. The red markings, if present at all, remain small and limited to the elytra, contrary to the more conspicuously black/red symmetric pattern of several continental species in the C. jucunda group. Elytral disc flat, not particularly modified (i.e., lacking longitudinal costae, heavy punctation, and white velutinous markings).

Head largely shiny. Pygidium evenly strongly rounded (not impressed over midline), crowdedly punctate. Propygidial spiracles conically raised. Characteristic of the holotype is the surface of the clypeus, which slopes evenly down to the apical border, not being distinctly reflexed (i.e., margin hardly concave in lateral view); the male from the Minahassa (i.e., North Sulawesi) has a different, more concave clypeal margin. This male lacks the abundant tomentum, and its microsculpture is different from the holotype, being coarser on the head. The parameres are slightly different, as in the shape of the interparameral split, which is more widened in the holotype, narrower in the Minahassa male. The body length of both males reaches approximately 22 mm (with head bent down, in protective state).

The female from Southeast Sulawesi (total body length reaches approximately 24 mm) is virtually entirely black, but agrees with the holotype in its clypeal shape and several details. The ridge on the underside of the protibia is well developed, terminally slightly protuberant, but lacking the long, downward projection of the males.

The abdominal venter is not concave—as usual in most female Cetoniinae . Pygidium moderately, evenly convex, surface plane more upward, crowdedly punctate (compare Figs. 13–15 ). Some parts show thin indications of tomentum.

The large C. cyprilrusi from Borneo mentioned in the Introduction belongs to a different group of Clinterocera species (Legrand & Chew Keas Foo 2010).

Derivatio nominis. Named after the classical natural history explorer and specialist in Ichneumonidae, Gerd Heinrich (1896-1984), collector of two of the Sulawesi specimens.

Figures

FIGURES 1 – 6. Clinterocera Sulawesi. 1 – 3, habitus oblique; 4 – 6, forebody dorsofrontal. 1, 4. C. heinrichi, holotype; 2, 5, male, He-He; 3, 6, female, Salokko. Scale lines 5 mm.

FIGURES 7 – 12. Clinterocera Sulawesi. 7 – 9, habitus dorsal; 10 – 12, pygidium and adjacent parts, dorsocaudal. 7, 10. C. heinrichi, holotype; 8, 11, male, He-He; 9, 12, female, Salokko. Scale lines 5 mm.

FIGURES 13 – 17. Clinterocera Sulawesi. 13 – 15, habitus lateral; 16, protibia lateral; 17, section from suture over left elytron. 13, 16 – 17. C. heinrichi, holotype; 14, male, He-He; 15, female, Salokko. Scale lines 2 mm.

FIGURES 18 – 24. Clinterocera Sulawesi. 18 – 20, habitus ventral; 21 – 24, parameres full-face and lateral. 18, 21 – 22, C. heinrichi, holotype; 23 – 24, male, He-He. Scale lines 2 mm.