Onthophagus annulopunctatus Krikken & Huijbregts

Krikken, J. & Huijbregts, J., 2017, Sulawesi Onthophagus: seven new species in select groups (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 4238 (3), pp. 301-334 : 326-329

Onthophagus annulopunctatus Krikken & Huijbregts , new species

( Figs. 10 , 28 , 56–61 )

Material examined. Holotype male ( RMNH) from Indonesia: Central Sulawesi: Lore Lindu National Park: Dongi-Dongi Shelter , 4–8.xii.1985, J. Krikken pw48a, 940 m; multistratal evergreen forest, human excrement traps.

The 244 paratypes are summarized below:

CENTRAL SULAWESI: LORE LINDU NATIONAL PARK

- Danau Tambing forest, 1600 m, 5–9.xii.1985, J. Krikken, pw51a, multistratal evergreen forest, 4 human excrement traps, 1 in RMNH

- Dongi Dongi (garage), 950 m, 4–9.xii.1985, J. Krikken, pw55a multistratal evergreen forest, 4 dung traps, 13 in RMNH

- Dongi Dongi Shelter, 940 m, 4–8.xii.1985, J. Krikken, pw48a, multistratal evergreen forest, 2 human excrement traps, 7 in RMNH

- Marena Shelter, 600 m, 14–17.xii.1985, J. Krikken, pw65b, second-growth forest, 2 fish traps, 1 in RMNH - Marena forest (near river), 600 m, 14–17.xii.1985, J. Krikken, pw64a, multistratal evergreen forest, 6 human excrement traps, 24 in RMNH

CENTRAL SULAWESI: PALU REGION

- Tawaeli-Toboli road (km 34), 500 m, 20–22.xii.1985, J. Krikken, pw69a, multistratal evergreen forest, degraded, 2 human excrement traps, 2 in RMNH

NORTH SULAWESI: DUMOGA BONE NATIONAL PARK

- Edwards Subcamp, 664 m, 2–5.vi.1985, J. Huijbregts, hh350, multistratal evergreen forest, window trap, 1 in RMNH

- Edwards Subcamp, 664 m, 2–6.vi.1985, J. Huijbregts, hh352, multistratal evergreen forest, 4 human excrement traps, 2 in RMNH

- Malibagu Rd, 110 m, 14–19.xi.1985, J. Krikken, pw38a, multistratal evergreen forest edge, 2 human excrement traps, 2 in RMNH

- Mt Mogogonipa, 1000 m, 22–25.viii.1985, J. Huijbregts, hh430, multistratal evergreen forest, hand collected, 5 in RMNH

- Mount Mogogonipa, 1000 m, 22–26.viii.1985, J. Huijbregts, hh427a, multistratal evergreen forest, 2 human excrement traps, 9 in RMNH

- Toraut R 3, 245 m, 8–10.v.1985, J. Huijbregts, hh311, multistratal evergreen forest, 4 human excrement traps, 2 in RMNH

- Toraut R 3, 245 m, 16–20.1985, J. Huijbregts, hh422, multistratal evergreen forest, human excrement baited, baffled canopy funnel trap 0 m, 6 in RMNH

- Toraut, 217 m, 9–11.v.1985, J. Huijbregts, hh313, multistratal evergreen forest edge, 4 human excrement traps, 1 in RMNH

- Toraut: Maze, 220 m, 9–15.xi.1985, J. Krikken, pw23, multistratal evergreen forest, 4 human excrement traps, 3 in RMNH

- Tumpah: Beach, 222 m, 18.v.1985, J. Huijbregts, hh322, river & river banks, hand collected, 2 in RMNH SOUTHEAST SULAWESI: KENDARI DISTRICT

- Mekara, 7 km S of Lambuya, 70 m, 15–18.xi.1989, Krikken & Van der Blom, sw34a, Pinus -Acacia forest plantation, 2 human excrement traps, 1 in RMNH

SOUTHEAST SULAWESI: KOLAKA DISTRICT

- Sanggona Base Camp, 200 m, 9–12.x.1989, Krikken & Van der Blom, sw01a, second-growth forest, 2 human excrement traps, 65 in RMNH

- Sanggona Base Camp, 200 m, 9–12.x.1989, Krikken & Van der Blom, sw01b, second-growth forest, 2 fish traps, 5 in RMNH

- Sanggona Base Camp, 200 m, 10–21.x.1989, Krikken & Van der Blom, sw08, second-growth forest, hand collected, 2 in RMNH

- Sanggona Base Camp, 200 m, 13–17.x.1989, Krikken & Van der Blom, sw05b, multistratal evergreen forest, 2 fish traps, 1 in RMNH

- Sanggona Base Camp, 200 m, 13–17.x.1989, Krikken & Van der Blom, sw06b, multistratal evergreen forest, 2 fish traps, 1 in RMNH

- Sanggona Base Camp, 200 m, 13–17.x.1989, Krikken & Van der Blom, sw06a, multistratal evergreen forest, 2 human excrement traps, 8 in RMNH

- Sanggona Base Camp, 200 m, 13–17.x.1989, Krikken & Van der Blom, sw03a, second-growth forest margin, 2 human excrement traps, 32 in RMNH

- Sanggona Base Camp, 200 m, 13–17.x.1989, Krikken & Van der Blom, sw04a, second-growth forest, open space, 2 human excrement traps, 5 in RMNH

- Sanggona Base Camp, 200 m, 13–17.x.1989, Krikken & Van der Blom, sw05a, multistratal evergreen forest, 2 human excrement traps, 42 in RMNH

- Sanggona Base Camp, 200 m, 10–17.x.1989, Krikken & Van der Blom, sw06a, multistratal evergreen forest, 2 human excrement traps, 1 in RMNH

Description. Holotype, male. Body length approximately 4.3 mm. Generally black, forebody slightly shiny between dense punctation, elytra distinctly matt. Pilosity pale yellow; dorsal side mainly with short, erect setae and stubbles.

Clypeal border widely round, margin narrowly reflexed; clypeogenal transition continuous at border; head with clypeofrontal ridge obsolescent, surface densely punctate throughout. Eyes with approximately 6 facet rows across widest point; ratio interocular distance / single maximum eye width 13–14.

Pronotum evenly, moderately convex; basodiscal midline shallowly depressed; anterolateral corner rectangular, anterior section of lateral border straight, posterior section moderately sinuate; pronotal base virtually round (medially obtusely angular), finely marginate; pronotum densely, superficially but distinctly annulatepunctate; few punctures with short seta, most with microstubbles; punctural diameters decreasing rostrad, many punctures hardly separated by more than one diameter.

Elytral striae well defined, with distinct punctures, mainly separated by 2–4 times their diameter; distinctly crenulate on interstriae; interstriae slightly convex, all with (somewhat irregular) rows of seta-bearing asperities; setae short, one row on interstria 1, two on other interstriae; intervening derm microreticulate (x80).

Antennal club yellowish brown. Proventrite with coxal-marginal suture encompassing shallow but distinct anterolateral concavity. Metaventrite with vague midline impression; anterior lobe slightly (angularly) raised in front; disc with sparse micropunctation, laterally more abundant; wings with moderately abundant, small, setabearing punctures (some slightly annulate). Abdominal ventrites brown, with transverse row of seta-bearing punctures. Pygidium abundantly (rugulate-)punctate-setose; base with transverse ridge.

Legs brown. Protibia with 3+(1) larger denticles, spur elongate-acuminate. Metatibial spur distally feebly sinuate, apex truncate. Profemoral underside with punctate-setose; mesofemoral and metafemoral undersides with scattered, sparse, seta-bearing punctures. Metatarsomere 1 almost as long as tarsomeres 2–5 combined; approximate proportions of spur and tarsomeres 1–5: 12// 14/6/4 /3/5.

Aedeagus, Fig. 60 (paratype).

Measurements in mm. Maximum width of head 1.3. Median length of pronotum 1.4, maximum width 2.1. Sutural length of elytra 1.7, maximum width 2.3.

Variation and sexual dimorphism. Body length 3.2–4.6 mm. Microsculpture and pilosity (e.g., on interstriae) variable (differences between some specimens possibly due to wear). Clypeofrontal transition may have obsolescent ridge. Mature specimens usually black, but specimens from Southeast Sulawesi (series from Sanggona) have a rufous brown elytral base and interstriae 1–2 (as illustrated, Fig. 57 ), the remainder being moreor-less black (teneral specimens may be generally lighter brown). Possibly these Southeast populations represent a different (sub)species, not formally named here—more material from additional populations is needed for such action. The aedeagi look externally similar, all (from the north to the southeast) with a lateral, more-or-less dentiform parameral protrusion, as seen in other group members.

Females have a slight clypeofrontal ridge, but otherwise there is no conspicuous sexual dimorphism.

Etymology. Name refers to the annulate-ocellate punctation on the pronotum of this species.

Figures

FIGURES 9 – 12. Sulawesi Onthophagus species, oblique habitus. 9, O. begoniophilus, paratype male from Ambang. 10, O. annulopunctatus, paratype male from Mogogonipa. 11, O. hollowayi, holotype male from Dumoga. 12, O. seseba, holotype male from Batui (pygidium up). Scale lines approximately 1 mm.

FIGURES 25 – 30. Sulawesi Onthophagus species, dorsal forebody. 25, O. sopu, holotype male from Sopu. 26, O. sopu, paratype male from Sopu. 27, O. manguliensis, male from Mangoli. 28, O. annulopunctatus, paratype male from Mogogonipa. 29, O. hollowayi, holotype male from Dumoga. 30, O. seseba, holotype male from Batui. Scale lines approximately 1 mm.

FIGURES 56 – 66. Sulawesi Onthophagus body parts. 56, O. annulopunctatus, head full-face, paratype male from Mogogonipa. 57, O. annulopunctatus, left elytron dorsal, paratype male Sanggona. 58, O. annulopunctatus, protibial upper side, paratype male from Mogogonipa. 59, O. annulopunctatus, metatibial upperside, paratype male from Mogogonipa. 60, O. annulopunctatus, aedeagus lateral, paratype male Toraut. 61, O. annulopunctatus, head full-face, paratype female from Marena. 62, O. hollowayi, head full-face, holotype male from Dumoga. 63, O. hollowayi, left elytron dorsal, holotype male from Dumoga. 64, O. hollowayi, protibial upper side, holotype male from Dumoga. 65, O. hollowayi, metatibial upperside, holotype male from Dumoga. 66, O. hollowayi, aedeagus lateral, holotype male from Dumoga. 67, O. hollowayi, head full-face, paratype female from Malibagu. Scale lines approximately 1 mm.