Genus Eubulus

Data on Genus Eubulus (subtribe Cryptorhynchina, tribe Cryptorhynchini, subfamily Cryptorhynchinae)

The Wikipedia page for Cryptorhynchinae states that there are 204 named species of Eubulus worldwide. iNaturalist has Observations for only 7 of those species worldwide (56 Observations), with 5 of the 7 occurring in North America - 3 North of Mexico and 2 in Mexico only. I have found the top two at a single site in Pennsylvania.

E. obliquefasciatus (US)
E. bisignatus (US, C)
E. parochus (C)
E. brevis (M)
E. marginatus (M)
E. triangularis
E. miniatus

A similarly-sized North American dataset with a different mix of species is found in the Global Biodiversity Information Facility (GBIF) database - 44 Observations & Museum-preserved specimens as follows:

E. bisignatus (US)
E. parochus (US & C)
E. nimbatus (Panama) [Yes, Panama is part of North America, as I just learned]
E. alticarinatus (Panama)

The BugGuide platform (which only covers the US and Canada), has 40 Observations of the following species in total for the 2 countries (39 in the US and 1 in Canada):

E. bisignatus
E. obliquefasciatus
E. parochus

The 3 US & Canadian species recorded on these 3 platforms are mirrored by professional findings published in 2002 by R. S. Anderson.

A more recent article can be found on jstor.org:

"A Review of the Genus Eubulus Kirsch 1869 in the United States and Canada (Curculionidae: Cryptorhynchinae)," by Robert S. Anderson, The Coleopterists Bulletin, Vol. 62, No. 2 (Jun., 2008), pp. 287-296 (10 pages), Published By: The Coleopterists Society

Abstract:

"The genus Eubulus is reviewed for the United States and Canada. Three species are recognized; E. parochus (Herbst), E. bisignatus (Say) and E. obliquefasciatus (Boheman), resurrected name. A neotype is designated for Eubulus bisignatus (Say). A key to the three species is presented and natural history information and distributions are summarized. Three additional specimens of Eubulus collected in North America, but not assigned to species, are discussed."

This paper states that:

"Like most Cryptorhynchinae, adults are associated with dead limbs of various trees. North American species are associated with Junglandacaea [Walnut], Fagacaea [Beech], and Aceracaea [Maple]." The site where I have made my Observations is adjacent to many American beech trees and a few Maple trees.

The authors also discuss an interesting study by Halik & Bergdahl (2002 and 2006), on the role of E. parochus in the distribution of pathogenic fungal spores as the larvae mine beneath the bark of freshly downed butternut (white walnut) limbs.

E. bignatus and E. obliquefasciatus are noted as being attracted to lights, which is how I made my Observations.

Publicado el 19 de junio de 2021 por kidneymoth