Triodontus hanskii Frolov, 2010

Frolov, Andrey V., Montreuil, Olivier & Akhmetova, Lilia A., 2016, Review of the Madagascan Orphninae (Coleoptera: Scarabaeidae) with a revision of the genus Triodontus Westwood, Zootaxa 4207 (1), pp. 1-93 : 88

publication ID

https://doi.org/ 10.11646/zootaxa.4207.1.1

publication LSID

lsid:zoobank.org:pub:F2875582-31E2-496F-AEEF-1D657DD86C33

DOI

https://doi.org/10.5281/zenodo.6057712

persistent identifier

https://treatment.plazi.org/id/5B4FBD00-FF86-613D-FF02-632CFBBFF9BF

treatment provided by

Plazi

scientific name

Triodontus hanskii Frolov, 2010
status

 

Triodontus hanskii Frolov, 2010

( Figs. 45 View FIGURE 45 A–G)

Triodontus hanskii Frolov, 2010b: 1031 .

Type material examined. Holotype, male, “ MADAGASCAR Ambatotsirongorongo Feb 2005 fish baited trap Ilkka Hanski leg. / Triodontus hanskii Frolov 2010 HOLOTYPUS ” ( ZIN) .

Diagnosis. From other species with 2 medial tubercles on the pronotum and simple shape of the 6th abdominal sternite in males ( T. owas Westwood , T. itremoi Paulian , T. copridoides Paulian ), T. hanskii can be separated by having the parameres without teeth and notches laterally ( Fig. 45 View FIGURE 45 E).

Description. Male. Body length 10.1 mm. Body strongly shiny, uniformly colored ( Figs. 45 View FIGURE 45 A–B). Color of head, pronotum, and elytra dark brown; legs, antennae, and underside of the body brown.

Frontoclypeus convex anteriorly, rounded laterally, anterior margin crenulate and setose in dorsal view. Eyes relatively small (diameter slightly smaller than the distance between eye and gula in ventral view), incompletely divided by canthus into small, dorsal and large, ventral parts. Frontoclypeus with small but distinct tubercles mediad of each eye and with short horn in center of frontoclypeus.

Pronotum with 2 obtuse tubercles in the middle and with excavations aside the tubercles. Lateral margins with wide border appearing somewhat crenulate in dorsal view. Anterior margin with wide, smooth border. Posterior margin with fine border; not crenulate; punctate with small, narrow, longitudinal punctures laterally. Surface of most pronotum smooth, anterior angles with a few coarse punctures.

Scutellum rounded apically, visible part is about 1/15 length of elytra.

Elytra convex, with distinct humeral humps. Maximum width approximately at middle. Elytra with 10 feebly visible striae and with oblique line from base of 6th stria to approximately middle of 8th stria. Stria with small, indistinct punctures. Intervals with minute punctures, almost smooth. Base of elytra with an irregular row of coarse punctures each bearing small, yellow seta.

Sternite 8 medially about 3 times as short as other sternites combined, slightly sinuate apically, without tubercles or distinct concavities in the middle ( Fig. 45 View FIGURE 45 F).

Parameres with upper lobes somewhat tapering apically and sinuate on lateral margin basally ( Fig. 45 View FIGURE 45 E). Internal sac of aedeagus with a somewhat pentagonal main sclerite and smaller auxiliary sclerites ( Fig. 45 View FIGURE 45 D).

Female. Unknown.

Distribution and habitat. The species is known from a single specimen collected in Ambatotsirongorongo forest in Tolagnaro region of South Madagascar. This is the southernmost locality of Triodontus species known to date and it is also the southernmost remnant of indigenous rain forest on the island ( Fig. 45 View FIGURE 45 G). The only known specimen of T. hanskii was collected in a pitfall trap baited with fish carrion. Short trap exposure (1 day and night) suggests that the specimen was attracted to carrion rather than captured accidently.

ZIN

Russian Academy of Sciences, Zoological Institute, Zoological Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Orphnidae

SubFamily

Orphninae

Genus

Triodontus

Loc

Triodontus hanskii Frolov, 2010

Frolov, Andrey V., Montreuil, Olivier & Akhmetova, Lilia A. 2016
2016
Loc

Triodontus hanskii

Frolov 2010: 1031
2010
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF