Heterogomphus telamon ( Burmeister 1847 )

Alvarez, Héctor Jaime Gasca, da, Claudio Ruy Vasconcelos, Fonseca & Ratcliffe, Brett C., 2008, Synopsis of the Oryctini (Coleoptera: Scarabaeidae: Dynastinae) from the Brazilian Amazon, Insecta Mundi 2008 (61), pp. 1-62 : 22-25

Heterogomphus telamon ( Burmeister 1847)

( Fig. 33-38 )

Stypotrupes telamon Burmeister 1847: 210

Syneterogomphus sternbergi Prell 1912: 55 (synonym)

DESCRIPTION. Length: 39.2-51.4 mm (males); 40.7-50.0 mm (females). Width: 19.2-27.0 mm (males); 21.9-25.8 mm (females). Color: Black.

Males. Head: Frons with moderately short, recurved horn, apex acuminate ( Fig. 34 ). Eye canthus with apex slightly narrowed, surface rugose. Clypeus reflexed, truncate, apex broad, surface rugose. Antenna with 10 segments, club subequal in length to segments 2-7. Mandibles bidentate, teeth with rounded apices, external tooth longer. Pronotum: Majors with long, broad prominence, apex bilobed; sides with small, rounded lobe forming 2 small fovea in anterior region ( Fig. 34 ). Surface of posterior half smooth, with sparse punctures, anterior half rugose. Minors with typical reduction in size of frontal horn and pronotal prominence. Elytra: Impressed sutural stria present. Surface usually smooth, occasionally with small punctures on the lateral margins. Pygidium: Surface finely punctate, without setae. In lateral view, surface strongly convex. Legs: Protibia quadridentate. Apex of posterior tibia with 2 teeth ( Fig. 35 ). First tarsomere of posterior tarsus long, quadrangular. Venter: Prosternal process long, broad, laminar, apex quadrangular with long, thick setae. Parameres: Oval, weakly contracted forward apices. Basal half with rounded teeth ( Fig. 36-37 ).

Females. As males except in the following respects: Head: Frons with surface strongly rugose, with a small tubercle with acuminate apex. Pronotum: Two small tubercles behind anterior margin. Surface of anterior half strongly rugose. Lateral margins strongly punctate. Pygidium : Apex with small setae, weakly convex in lateral view.

DIAGNOSIS. Heterogomphus telamon may be distinguished from other Heterogomphus species by the long, laminar prosternal process, apex of posterior tibiae bidentate, and the pronotal prominence apparently forming four lobes with two small fovea.

DISTRIBUTION. There are little data about the distribution of H. telamon . Endrödi (1985) recorded this species from Brazil and Surinam. The specimens listed below from Amazonas state represents NEW RECORD from the Brazilian Amazon.

LOCALITY RECORDS. ( Fig. 38 ) 16 specimens examined (3 males, 13 females). Specimens were seen from the following collections : INPA, CZPB.

AMAZONAS (16): Barcelos (Rio Unini, Cachoeira Boca da Onça), Coari (Rio Urucu), Manaus, Novo Airão (Ajarú), Novo Aripuanã, Itacoatiara (Fazenda Aruanã, Am 010 km 215), Parque Nacional do Jaú, São Gabriel da Cachoeira (Querari).

TEMPORAL DISTRIBUTION. January (1), February (1), April (1), May (2), June (1), July (4), August (2), September (3), October (1).

BIOLOGY. Adults are nocturnal and can be attracted to lights. In Brazilian Amazonia, this species has been collected from semi-humid ombrophilous forests and foodplain areas at elevations of 22-115 meters.

Figures

Figure 38. Distribution of Heterogomphus telamon in Brazilian Amazonia.

Figure 33-37. Heterogomphus telamon. 33) Habitus. 34) Male head and pronotum (scale line: 5 mm). 35) Metatibia (scale line: 5 mm). 36) Parameres frontal view. 37) Parameres lateral view (scale line: 1 mm).