Eubulus parochus (Herbst)

Anderson, Robert S., 2008, A Review Of The Genus Eubulus Kirsch 1869 In The United States And Canada (Curculionidae: Cryptorhynchinae), The Coleopterists Bulletin 62 (2), pp. 287-296 : 289-292

publication ID

https://doi.org/ 10.1649/1064.1

persistent identifier

https://treatment.plazi.org/id/03A6AB65-711C-FFE2-67B1-FD298DF1F9A3

treatment provided by

Carolina

scientific name

Eubulus parochus (Herbst)
status

 

Eubulus parochus (Herbst) View in CoL

( Figures 1–2 View Figs , 7–8 View Figs , 14 View Figs )

Curculio parochus Herbst 1797:55 View in CoL .

Cryptorhynchus luctuosus Boheman 1837:146 View in CoL .

Eubulus parochus View in CoL ; Champion 1905:581.

Rhyssomatus beutenmuelleri Van Dyke 1930: 161 View in CoL .

Taxonomic notes. Herbst and Boheman types were not examined. LeConte (1876:251) gives C. luctuosus Boheman View in CoL and C. misellus Boheman View in CoL as junior synonyms of C. bisignatus Say. Subsequently, Champion (1905:581) View in CoL , states that ‘‘ C. luctuosus Boh View in CoL , of which there is a specimen labeled ‘‘Mex’’ (a locality requiring confirmation) in Dr. Sharp’s collection seems to be synonymous with E. parochus Say View in CoL , and not with E. bisignatus View in CoL as quoted by LeConte.’’ O’Brien and Wibmer (1982:156) follow Champion and list Cryptorhynchus View in CoL ‘‘? luctuosus View in CoL ’’ Boheman as a junior synonym of E. parochus View in CoL (but do not indicate why they used the ‘‘?’’ prior to the name). Anderson (1984) placed Rhyssomatus beutenmuelleri Van Dyke View in CoL as a junior synonym of E. parochus View in CoL .

There are five specimens in the LeConte Collection (MCZC). Two of these have pink circles (5 Vermont, New Hampshire, Massachusetts), one has a green diamond, and two are labeled ‘‘D.C.’’. All are Eubulus parochus (Herbst) . In the Horn Collection (MCZC) there are four Eubulus parochus labeled ‘‘CAN’’ and two Eubulus bisignatus labeled ‘‘PA’’.

Based on specimens examined by me, O’Brien and Wibmer (1982, 1984) appear to have mistakenly identified E. parochus as E. obliquus . Similarly, they identified larger E. bisignatus as E. parochus . This misidentification plus the discovery of a second species mixed with E. bisignatus in nearly all collections I have examined means that the distributions of E. bisignatus , E. parochus and Cryptorhynchus obliquus as given in O’Brien and Wibmer (1982) are either incomplete or incorrect. Consequently, the concerns raised by Halik & Bergdahl (2006) that the distribution of E. parochus extends beyond that of its sole known host, Juglans cinerea Linnaeus , butternut, are unnecessary. Records of E. parochus as presented here ( Fig. 14 View Figs ) do not extend beyond the range of butternut.

Diagnosis. Body size 4.8–6.5 mm ( Figs. 1–2 View Figs ). Head with eyes separated by almost width of base of rostrum in frontal view; area above each eye with welldeveloped oblique subcarinate ridge; frons foveate; femora each with two distinct teeth on inner margin, basal (proximal) tooth low and rounded (teeth broadly joined by poorly developed flange in some specimens). Aedeagus ( Fig. 8 View Figs ). Tergite VIII of female ( Fig. 7 View Figs ).

Most individuals of Eubulus parochus are easily recognized by their larger size but small specimens are difficult to separate from larger E. bisignatus .

Biology. A detailed study of the natural history, development and associations with fungi (butternut canker disease) on butternut, has been carried out by Halik & Bergdahl (2002, 2006) in Vermont. Adults are commonly collected on freshly downed limbs or small branches of butternut. Larvae mine beneath the bark in the outer cambium and sapwood. Adults appear to be casual vectors of pathogenic fungi. Museum specimens from Ontario and Indiana were also collected on butternut .

Distribution. Figure 14 View Figs . This species is found in the northeastern United States and adjacent Canada. State records are CT, IL, IN, KY, MD, MA, MI, NJ, NY, NC, PA, TN, VT, VA, WV; provincial records are NB, ON, PQ.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Eubulus

Loc

Eubulus parochus (Herbst)

Anderson, Robert S. 2008
2008
Loc

Curculio parochus

Herbst 1797: 55
1797
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