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Cyclommatus metallifer 01

Taxonomic study on the subspecies of Cyclommatus metallifer (Boisduval, 1835) from Indonesia (Coleoptera: Lucanidae)

Authors:  Eunjoong Kim, Jinyoung Park, Jong Kyun Park.

Introduction

Species of the genus Cyclommatus are distributed mainly in Southeast Asia, a region characterized by tropical and subtropical climate. Most members of this genus have a strong positive phototaxis and are deeply attracted to light traps. These species are diurnal, and they feed on the sap of tall herbaceous plants or woody plants by scratching the surface with their mandibles (Ishitsuka 2011); they also gather flowers of specific genera of Theaceae (Suzuki 1996). This genus belongs to tribe Cyclommatini and was listed at Maes, 1992 but without taxonomic description; therefore, Huang and Chen (2013) described this tribe.

Cyclommatus metallifer (Boisduval 1835) is a type species of this genus, and to date five subspecies have been reported. Since Parry (1862) reported C. aenomicans, Jakowlew (1896) reported C. metallifer var. ritsemae, and then Mizunuma and Nagai (1991) reported C. m. finae, C. m. isogaii, C. m. otanii, and C. m. sangirensis from Indonesia. Among the subspecies, C. m. ritsemae has been synonymized by considering type locality Celebes, which is the covering type locality of Celebes, Manado. Furthermore, C. m. otanii was synonymized in this research by considering the morphological characters based on original description and examination of materials from the north Moluccas region. A new subspecies was suggested from the population of Buton Island.

The following abbreviations are used in this paper: PCEK, private collection of Eunjoong Kim, Entomology Laboratory, Kyungpook National University, Republic of Korea; PCJK, private collection of Jinyeong Kim, Anyang-si, Republic of Korea; PCSB, private collection of Seungheon Baek, Sacheon-si, Republic of Korea; *, indicates type locality of the subspecies.

Systematic accounts

Family Lucanidae (Latreille, 1804)

Subfamily Lucaninae (Latreille, 1804)

Tribe, Cyclommatini (Huang and Chen, 2013)
Cyclommatini (Maes, 1992), nomen nudum (Smith 2006)

Genus Cyclommatus (Parry, 1862)

Cyclommatus (Parry, 1862)

Cyclophtalmus (Hope and Westeood, 1845); used by Stenberg for genus of Arachnidae (Parry 1862)

Megaloprepes (Thomson, 1862)

Key to subspecies of Cyclommatus metallifer from Indonesia by male characteristics
1.
Femur without yellow spot on dorsal view ……………ssp. finae
-
Femur with yellow spot on dorsal view ………………………….2

2.
Elytral shoulder with well developed process……… ssp. isogaii
-
Elytral shoulder without process ………………….………………3

3.
Head width distinctly broader than pronotum …ssp. aenomicans
-
Head width slightly broader than pronotum ……………………4

4.
Body surface with strong greenish gold luster …ssp. sangirensis
-
Body surface without greenish gold luster ……………….………5

5.
Body surface with minute gloss, Elytral shoulder rounded, mandible less inclined ………………………………..ssp. metallifer
-
Body surface with strong gloss, Elytral shoulder strongly angulated, mandible strongly inclined toward inside ………………………………………………………….butonensis ssp. nov.

Key to subspecies of Cyclommatus metallifer from Indonesia by female characteristics
(butonensis ssp. nov. is excluded here, because of lack of collection and information on female)
1.
Body dark, surface smooth, with densely punctate ……………2
-
Body bright, surface rough, with coarsely punctate …………….3

2.
Elytral shoulder with developed process, body surface with strong gloss ………………………………………….……ssp. isogaii
-
Elytral shoulder without process, body surface with minute gloss ………………………………………….……………………...ssp. finae

3.
Body color brown …………………………….……ssp. aenomicans
-
Body color reddish brown ………………………………….……….4

4.
Body surface with strong greenish gold luster…ssp. sangirensis
-
Body surface without greenish gold luster………...ssp. metallifer

Link:

https://www.sciencedirect.com/science/article/pii/S2287884X17300997