Ochodaeus umbonulus Paulsen 2019, new species

Ochodaeus umbonulus Paulsen, new species

Type material. Holotype male (CASC; Fig. 2a) labeled: a) “ MADAGASCAR: Tulear / Berenty Special Reserve, / elev 85 m, 8 km NW / Amboasary / 25 May–4 June 2003 / 25° 00.40′ S, 46° 18.20′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-26”; c) on red paper, “ Ochodaeus / umbonulus / Paulsen / HOLOTYPE ” (Fig. 2d).

One male, one female paratypes (CASC) labeled: a) “ MADAGASCAR: Tulear / Berenty Special Reserve, elev 85 m / 8 km NW Amboasary / 30.XI–7.XII.2002 / 25° 00.40′ S, 46° 18.20′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-07”. One female paratype (CASC) labeled: a) “ MADAGASCAR: Tulear / Berenty Special Reserve, / elev 85 m, 8 km NW Amboa- / sary; 30.XI–7.XII.2002 / 25° 00.40′ S, 46° 18.20′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-07”. One male, one female paratypes (CASC) labeled: a) “ MADAGASCAR: Tulear / Berenty Special Reserve / elev 85 m, 8 km NW Amboa- / sary; 4–15 February 2004 / 25° 00.40′ S, 46° 18.20′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-39”. Female paratype (CASC) labeled: a) “ MADAGASCAR: Tulear: / Berenty Special Reserve, / elev 85 m, 8 km NW Amboa- / sary; 7–22.VIII.2004 / 25° 00.40′ S, 46° 18.20′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-54”. Paratype male (MJPC) labeled: a) “ MADAGASCAR: Tulear / Province, Berenty Special / Reserve, elev 85 m, 8 km / NW Amboasary; 14–24. IV. / 2003; 25° 00.40′ S, 46° 18.20′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-22”; orange paper “DNA VOUCHER / 9424 2012 / MJ Paulsen – UNSM ”. Paratype male (MJPC) labeled: a) “ MADAGASCAR: Tulear / Province, Berenty Special / Reserve, elev 35 m, / 8 km NW Amboasary / 24 March–4 April 2004 / 25° 01.26′ S, 46° 18.33′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / spiny forest MA-02-22A-15”. Female paratype (CASC) labeled: a) “ MADAGASCAR: Tulear Prov. / Berenty Special Reserve, / elev 35 m, 8 km NW Ambo- / asary; 31.VII–5.VIII.2004 / 25° 01.26′ S, 46° 18.33′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / spiny forest MA-02-22A-23”. Male paratype (FSCA) labeled: a) “ MADAGASCAR: Tulear / Prov., Berenty Special / Reserve, elev 85 m, 8 km NW / Amboasary; 7–14.XII.2002 / 25° 00.40′ S, 46° 18.20′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / gallery forest MA-02-22-08”. One male (JBHC), two female (JBHC, MJPC) paratypes labeled: a) “ MADAGASCAR: Tulear Prov. / Berenty Special Reserve, / elev 35 m, 8 km NW / Amboasary; 10–19 June 2003 / 25° 01.26′ S, 46° 18.33′ E ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala, malaise trap / spiny forest MA-02-22A-01”. Female paratype (UNSM) labeled: a) “ MADAGASCAR: Toliara Prov. / Forêt de Mite, elev 75m, / 20.7 km 29° WNW Tongobory / 23° 31′ 27˝ S 44° 7′ 17˝ E / 27 Feb–3 March 2002 ”; b) “coll: Fisher, Griswold et al. / California Acad. of Sciences / malaise trap - in gallery forest / collection code: BLF5849”; c) “CASENT / 8027109”; d) on orange paper, “DNA VOUCHER / P064 2008 / M.J. Paulsen UNSM ”. Female paratype (CASC) labeled: a) “ MADAGASCAR: Tulear / Province, Andohahela Nat’l / Park, Tsimelahy, Parcelle II / 24° 56.21′ S, 46° 37.60′ E / 5–15 February 2003 ”; b) “ California Acad of Sciences / colls: M. Irwin, F. Parker, / R. Harin’Hala. el 180 m / malaise trap in transitional / forest, MA-02-20-15”. Male paratype (CASC) labeled: a) “ MADAGASCAR: Tulear / Ambohimahavelona village / 33 km NE of Tulear / 4–11 March 2009 / 23° 26.45′ S 43° 53.98′ E ”; b) “ Calif. Acad. of Sciences / coll: M. Irwin, R. Harin›Hala / malaise trap, dry forest / elev 45 m MG-50B-24”. Male paratype (MNHN) labeled: a) “ Museum Paris / Madagascar / Rég. d› Ankazoabo / C. Le Barbier 1920”.

All paratypes (n = 17) with label: on yellow paper, “ Ochodaeus / umbonulus / Paulsen / PARATYPE ”.

Description. Holotype male (Fig. 2a). Coleoptera: Scarabaeoidea: Ochodaeidae. Length 5.3 mm. Width 3.1 mm. Color: Uniformly light yellowish brown; surface shiny. Head: Surface weakly tuberculate; tubercles transverse, setose. Eyes large, globose, lacking ventral projection of canthus. Antennal club relatively small, approximately 1/2 size of eye. Mandibles broadly concave, basal angle prominent, apices falcate; left mandible with triangular internal tooth and second tooth behind; right mandible with first internal tooth weaker, also with second tooth behind. Frons weakly convex. Frontoclypeal suture straight, transverse. Clypeus trapezoidal, short (about 1/4 as long as wide), with central tubercle (minute horn); anterior margin with bead eroded medially. Labrum deeply, semicircularly emarginate. Mentum slightly wider than long, anteriorly emarginate with broad semicircular fovea. Pronotum: Form convex. Surface densely granulate; granules shiny, with short seta, some flattened. Elytra: Form convex, not elongate, elytra together as long as wide. Surface with striae moderately impressed, punctate, surface smooth between punctures (except sutural stria with connecting groove); strial punctures large, separated by ~1 puncture diameter, lacking setae. Intervals irregularly tuberculate; tubercles uniformly small, setose; setae shorter than diameter of largest strial punctures. Legs: Protibia broad (Fig. 2b), tridentate externally, with moderately long, curved pollex. Profemur with apical tooth strong, acute. Mesofemur and metafemur with apical teeth reduced to obtuse lobe. Metatibia flattened, dorsal surface with internal margin blade-like basally. Venter/Abdomen: Metasternum and abdomen sparsely punctate; punctures large with long, golden setae. Last abdominal segment with erect setae. Pygidium rugosely punctate, setose, setae. Stridulatory peg subcircular (Fig. 2c). Male genitalia: Sclerotized patch on internal sac between parameres broadly triangular, rounded apically; internal sac lacking complex armature.

Paratype variation. Males (n = 9; length 5.0– 7.8 mm; width 2.5–3.8 mm), females (n = 8; length 5.3–6.5 mm; width 2.8–3.3 mm). Color is not informative, varying from testaceous to dark reddish brown. Larger males have the apical teeth of the middle and hind femora distinct and acute. Females have narrower protibiae, and the setae on the last abdominal segment are recumbent rather than erect.

Remarks. The centrally located clypeal tubercle, blade-like edge on the metatibia near the femoral tooth, and broad protibiae of males distinguish O. umbonulus from its congeners in Madagascar. The labrum is somewhat deeply emarginate for a Madagascan species, as if a semicircular area had been removed, but the emargination is even deeper and narrower (U-shaped) in the following species.

Etymology. The name is a Latin noun in the nominative singular derived from umbo, ‘round protuberance’, with the diminutive suffix “-ulus”. This refers to the small tubercle on the clypeus.

Distribution. This species is distributed in the southern third of the island (Fig. 10).