# Infrantenna

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***Infrantenna*** is a genus of [horned powder-post beetles](/source/Horned_powder-post_beetle) in the family [Bostrichidae](/source/Bostrichidae). It is monotypic, being represented by the single [species](/source/Species), ***Infrantenna fissilis***, which is found in northern [Thailand](/source/Thailand).

## Description

Adults reach a length of about 3.3–3.6 mm (males) and 4–4.5 mm (females). The head, [pronotum](/source/Pronotum), pro- and mesotibiae and tarsi, as well as the ventral side are reddish brown. The labrum, antennae, [elytral](/source/Elytra) disc, pro- and mesofemora and the hind legs are brown. The pronotum and elytra gradually become darker brown anteriorly and posteriorly respectively, and the elytral declivity is dark brown.

## Life history

As a member of the family Bostrichidae, the species is likely to be [polyphagous](/source/Polyphagous). The junior author extracted the specimens from a semi-dry twig of an unknown species of [Fagaceae](/source/Fagaceae). The authors suggest that the hind legs could move vertically in the clefts to clean wood frass. The strongly developed last abdominal ventrite and tergite of the female may help to hold the male genitalia during mating and support the ovipositor during oviposition. Observations of mating and oviposition behaviours are necessary to confirm this hypothesis.

## Etymology

The genus name is feminine, and refers to the unusually low position of the antennal fossa. The name *fissilis* is derived from the Latin word for *cleft* which refers to the deep clefts of the elytral declivity of the female.[2]

## References

1. [https://www.biolib.cz/en/taxon/id1966850/](https://www.biolib.cz/en/taxon/id1966850/) BioLib

1. Liu, Lan-Yu & Sittichaya, Wisut (7 July 2022). ["The Oriental genera of Xyloperthini (Coleoptera: Bostrichidae: Bostrichinae), with a new genus and species from Thailand, and a key to the genera"](https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1851). *European Journal of Taxonomy*. **828** (1): 45–60. Retrieved October 6, 2025.

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Adapted from the Wikipedia article [Infrantenna](https://en.wikipedia.org/wiki/Infrantenna) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Infrantenna?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.