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Yuccaborus frontalis

Yuccaborus frontalis
Laredo, Webb County, Texas, USA
April 22, 2008
Size: 14 mm
Yuccaborus frontalis. Genus not represented here yet, so I placed this picture in "Dryophthorinae" section. I identified this specimen using: "Weevils of the Tribe Sipalini (Coleoptera, Curculionidae, Rhynchophorinae) Part 1. The Genera Rhinostomus and Yuccaborus. American Museum Noviates. Vaurie, P. 1970."

Moved from Dryophthorinae. Had to ask - looks quite different from type.

I've seen both "morphs". Anyway...that "type" link was pretty cool. I was unaware of that website.

compare to ...
type [original combination] - does Vaurie say the white markings are just variation, sexual dimorphism, ...? Also, it appears that Yuccaborus is now a junior synonym of Rhinostomus. Compare also to this.

I'm aware that the genus "Yuccaborus" is currently under "review" or debate. Weevil taxonomists disagree. Despite this, the specimen is definately not R. barbirostris. Whether it's Rhinostomus or Yuccaborus, the species is definately frontalis. And yes, this species can have white markings or not (all black).

This paper: "Anderson, R. S., 2002. The Dryophthoridae of Costa Rica and Panama: Checklist with keys, new synonymy and descriptions of new species of Cactophagus, Mesocorylus, Metamasius and Rhodobaenus (Coleoptera; Curculionoidea). Zootaxa 80: 1–94" mentions Yuccaborus as a standing genus, but says, "The status of Yuccaborus as a distinct genus is open to question."

Lastly, the genus Yuccaborus is listed in "American Beetles Volume 2" (page 728). This site tends to use this book for beetle classification. For example, many consider Dryophthoridae to be a separate family, but this book has it as a sub-family as does bug guide.

I guess that's why it's open to question.

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