Golofa clavigera clavigera (Linnaeus, 1771) (Coleoptera: Scarabaeidae: Dynastinae)

Golofa clavigera clavigera (Linnaeus, 1771)
Scarabaeus claviger Linnaeus, 1771 (original combination).
Scarabaeus hastatus Fabricius, 1781 (synonym).
Scarabaeus subgrundator Voet, 1806 (synonym).
Golofa puncticollis Thomson, 1860 (synonym).

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Description: Golofa clavigera clavigera (Linnaeus) is a type species of genus Golofa, occurring in wide ranges including French Guiana, Venezuela, Brazil, Colombia, Ecuador, Peru, and Bolivia. G. clavigera clavigera is very common among the Golofa species. Its biology has not yet been studied. Identification information can be found in Cespesdes and Ratcliffe (2010), Endrödi (1985), and Hwang (2011).

References:

Cespesdes, A. A. and B. C. Ratcliffe. 2010. Golofa clavigera (Linnaeus, 1771) in Bolivia: a new country record (Coleoptera: Scarabaeidae, Dynastinae). Ecologia en Bolivia 45(1): 73–76.

Endrödi, S. 1977. Monographie der Dynastinae (Coleoptera) 6. Tribus: Dynastini. II. Acta Zoologica Academiae Scientiarum Hungaricae 23: 37-86.

Hwang, S.-M.-R. 2011. The Dynastini of the World (Coleoptera: Scarabaeidae: Dynastinae). Nature and Ecology (Academic Series), Volume 4. Seoul, South Korea. 368 pp.

Kim, J. 2016. Generic Guide to New World Scarab Beetles-Scarabaeidae-Dynastinae-Dynastini-Golofa. (URL: http://museum.unl.edu/research/entomology/Guide/Scarabaeoidea/Scarabaeidae/Dynastinae/Dynastinae-Tribes/Dynastini/Golofa/Golofa.html). In: B.C. Ratcliffe and M.L. Jameson (eds.), Generic Guide to New World Scarab Beetles (URL: http://www-museum.unl.edu/research/entomology/Guide/Guide-introduction/Guideintro.html).

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Euetheola rugiceps (LeConte, 1856) (Coleoptera: Scarabaeidae: Dynastinae)

Euetheola rugiceps (LeConte, 1856)
Ligyrus rugiceps LeConte, 1856 (original combination).
Euetheola humilis Burmeister, 1847 (synonym).

Euetheola rugiceps.jpg

Comment: E. rugiceps (LeConte) is known to occur southeastern US and keep spreading upward to midwest states. I personally collected couple of specimens in southern Nebraska, 2014. Very common in down south. They are mostly active in between May-June to August. I have experience of collecting more than a hundred specimen in a single night with a small battery-operated blacklight within an hour. This species do not show a sexual dimorphism, therefore, genitalia must be extracted to determine the sex. In my personal collections from Shreveport, LA and Alexandria, LA, there were whole lot more females than males collected.

*Image of aedeagus will be updated in near future.

Golofa argentina Arrow, 1911 (Coleoptera: Scarabaeidae: Dynastinae)

Golofa argentina Arrow, 1911
Golofa argentina Arrow, 1911 (original combination).

Golofa argentina_1600.jpg

 

Description: Golofa argentina Arrow is an endemic species occurring in Argentina. Life history or biology is not yet studied.

References:
Kim, J. 2016. Generic Guide to New World Scarab Beetles-Scarabaeidae-Dynastinae-Dynastini-Golofa. (URL: http://museum.unl.edu/research/entomology/Guide/Scarabaeoidea/Scarabaeidae/Dynastinae/Dynastinae-Tribes/Dynastini/Golofa/Golofa.html). In: B.C. Ratcliffe and M.L. Jameson (eds.), Generic Guide to New World Scarab Beetles (URL: http://www-museum.unl.edu/research/entomology/Guide/Guide-introduction/Guideintro.html).

Dynastes tityus (Linnaeus, 1763) (Coleoptera: Scarabaeidae: Dynastinae)

Dynastes tityus (Linnaeus, 1763)
Scarabaeus tityus Linnaeus, 1763 (original combination).

Dynastes tityus male.jpg

(Pictured specimen is reared male. Image of females will be updated in the near future.)

Description: One of two Dynastes species occurring in North America, the other one is Dynastes grantii Horn, 1870. Two species do not overlap the distribution. D. tityus occurs in Texas-Florida-New York, while D. grantii occurs in Arizona-Utah and northern Mexico. Five female specimens collected with light trap of metal halide + black light and mercury vapor + blacklight combinations from July 1st to July 6th, 2016 in central Louisiana.

Following image is one of those five females in collection site:

dsc01503(2 July 2016. @Central Louisiana)

References:
Moore, M. R. 2006. http://www.museum.unl.edu/research/entomology/Guide/Scarabaeoidea/Scarabaeidae/Dynastinae/Dynastinae-Tribes/Dynastini/Dynastes/D-tityus/Dtityus.html