Nemonychidae and Anthribidae of Wisconsin (Coleoptera: Curculionoidea)
Author
Janicki, Julia
Author
Young, Daniel K.
text
Insecta Mundi
2017
2017-10-27
2017
579
1
36
journal article
10.5281/zenodo.5169237
1942-1354
5169237
72D7076B-FB3E-442B-BD55-43342373ACE2
Choragus zimmermanni
LeConte
(
Fig. 5–6
)
Choragus zimmermanni
LeConte 1876: 408
.
Description.
Length
1.2–1.3mm
(head excluded). Body subcylindrical. Integument light brown to dark brown, without luster; antennae and legs yellow, slightly pubescent. Vestiture consisting of sparse, white to yellow setae. Rostrum flattened, short, dilated, subtruncate apically. Antennal segments 1–3 conical, 4–8 slender, 9–11 forming a loose, setaceous club. Eyes slightly convex, longer than wide, with about 10 rows of facets across. Pronotal width1.6X length, widest at base; surface densely punctate, finely reticulate. Elytral length 1.3X width, 2.0X pronotal length; striae with deep punctures, striae 9–10 complete and separate to elytral apex, 9
th
stria angulate above metathoracic sternum; interstriae densely and coarsely granulate, interstria 10 swollen. Pretarsus with claws each possessing a basal tooth.
Diagnosis.
Choragus zimmermanni
can be recognized by the elytra not having an extra group of punctures near interstria 10, interstria 10 swollen and 9
th
stria angulate above the metathoracic sternum, straight pronotal carina, fine pronotal reticulum, granulate interstriae, and by the circular (instead of slit-like) floors of the elytral punctures. This species also tends to be smaller than most other
Choragus
species
, usually around
1.3mm
.
Natural history.
In general, members of
Choragus
are associated with pyrenomycete fungi in the families
Xylariaceae
and
Diatrypaceae
. This species has been collected from sweet gum (
Liquidambar styraciflua
) in
Florida
(
Blatchley and Leng 1916
) and from basswood (
Tilia americana
) in
Wisconsin
.
Phenology.
In
Wisconsin
, adults of this species have been collected in July and August.
Collecting methods.
The
seven specimens
examined during this study came from three counties and represent a
NEW STATE RECORD
. Two specimens were collected in Malaise traps in a
Fagus
-Acer
forest, two from Lindgren funnel traps, one from a flight-intercept trap, one by sweeping, and another by beating branches of live basswood (
Tilia americana
) in a dry-mesic southern forest.