Pseudastylopsis

Subfamily

Lamiinae

Diagnosis - adult

Body length: 8–14mm.
Eyes: eye interommatidial setaeseta:
a sclerotized hair-like projection of the cuticle
absent, eye deeply emarginateemarginate:
notched at the margin
> half width, eye ommatidial density fine.
AntennaeAntenna:
in larval and adult insects, paired segmented appendages, borne one on each side of the head, functioning as sense organs and bearing a large number of sensilla
: antennal length reaching/surpassing end of body, antennal flagellar segments elongateelongate:
much longer than wide
, scapescape:
the first proximal segment of the antenna
smooth/punctate at apexapex:
end of any structure distad to the base
, antennal segment 3 > scapescape:
the first proximal segment of the antenna
.
Pronotumpronotum:
the upper and dorsal part of the prothorax
: pronotumpronotum:
the upper and dorsal part of the prothorax
shape transversetransverse:
broader than long
, pronotumpronotum:
the upper and dorsal part of the prothorax
lateral armature blunt tubercule.
Prosternum: prosternal process dilated at apexapex:
end of any structure distad to the base
, procoxal cavities closed posteriorly.
ElytraElytron:
the leathery forewing of beetles, serving as a covering for the hind wings, commonly meeting opposite elytron in a straight line down the middle of the dorsum in repose
: elytral length reaching or close to end of abdomen, elytral apicesapex:
end of any structure distad to the base
rounded or truncatetruncate:
cut off squarely at the tip
, elytral color pattern present.
Legs: visible tarsomeres: 4, femora clavateclavate:
thickening gradually toward the tip
, protibial spurs: 2, tarsal claws simple.

Form moderate-sized, subcylindrical. Head with front quadrate, convex, about as long as broad; vertexvertex:
the top of the head between the eyes, frons and occiput, anterior to the occipital suture
deeply impressed between eyes; mandibles shallowly arcuatearcuate:
arched or bow-like
, pointed at apices; genaegena:
the part of the cranium on each side below the eye
convergent, shorter than or longer than lower eye lobes; eyes moderate-sized, separated above by at least diameter of antennal scapescape:
the first proximal segment of the antenna
; antennal tubercles shallow, broadly divergentdivergent:
spreading out from a common base
; antennaeantenna:
in larval and adult insects, paired segmented appendages, borne one on each side of the head, functioning as sense organs and bearing a large number of sensilla
slender, eleven-segmented, slightly longer than body in males, as long as body in females, scapescape:
the first proximal segment of the antenna
with several long, erect setaeseta:
a sclerotized hair-like projection of the cuticle
beneath, third segment longer than first, fourth shorter than third. Pronotumpronotum:
the upper and dorsal part of the prothorax
broader than long, sides obtusely tuberculate at middle; apexapex:
end of any structure distad to the base
shallowly impressed, basebase:
the part of any appendage or structure that is nearest the body
broadly impressed; disk with five calluses, median one prominent; punctures dense, often extending onto call uses; prosternum with intercoxal process arcuatearcuate:
arched or bow-like
, about one-sixth to one-third as broad as coxal cavities; mesosternal processmesosternal process:
a prolongation of the mesosternum extending between the mesocoxae
about two-thirds as broad as coxal cavities; metasternum with episternumepisternum:
the aspect of a thoracic pleuron dorsal to the coxal cavity and anterior to the pleural suture
narrow, parallel-sided, barely tapering. ElytraElytron:
the leathery forewing of beetles, serving as a covering for the hind wings, commonly meeting opposite elytron in a straight line down the middle of the dorsum in repose
a little more than twice as long as broad; disk costate, with small tufted tubercles; basal gibbosities shallow; apicesapex:
end of any structure distad to the base
rounded to subtruncatesubtruncate:
not quite cut off squarely at the tip
. Legs robust; femora pedunculate; middle tibiaetibia:
the leg segment distal to the femur, proximal to the tarsus
with an external sinus; tarsitarsus:
the leg segment distal to the apex of the tibia, bearing the pretarsus; consists of one to five tarsomeres (including pretarsus)
short, first segment of hind pair about as long as two following segments together. Abdomen normally segmented, last sternite of females longer than fourth (Linsley and Chemsak 1995Linsley and Chemsak 1995:
Linsley, E.G. amp; J.A. Chemsak. 1995. The Cerambycidae of North America. Part VII, No. 2. Taxonomy and classification of the subfamily Lamiinae, tribes Acanthocinini through Hemilophini. University of California Press, Berkeley and Los Angeles. 292 pp.).

Similar genera

Astylopsis, Leptostylus

Differential diagnosis

Can be separated from Astylopsis by the prominent median callus of the pronotumpronotum:
the upper and dorsal part of the prothorax
and narrower prosternal process (< 1/3 as broad as coxal cavities).

Distribution

western Nearctic to Central America

Recorded host plants

Abies, Pseudotsuga, Pinus

Remarks

5 species + another ssp.

Synonyms

Leptostylus Horn, 1880, Trans. Amer. Entomol. Soc., 8: 119 (part); Leng and Hamilton, 1896, Trans. Amer. Entomol. Soc., 23: 116 (part).

Pseudostylopsis Dillon, 1956, Ann. Entomol. Soc. Amer., 49: 136

Taxonomy

Pseudastylopsis Dillon, 1956, Ann. Entomol. Soc. Amer., 49: 220