Pyrrhidium

Subfamily

Cerambycinae

Diagnosis - adult

Body length: 6–15 mm. 
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 reaches between basebase:
the part of any appendage or structure that is nearest the body
and end of 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
, 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 scapescape:
the first proximal segment of the antenna
≥ segment 3 or 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 acute spinespine:
a protuberance with an acute (sharp) distal end
, rarely blunt tubercule. 
Prosternum: prosternal processprosternal process:
a posterior extension of the prosternum between the coxae
not dilated at apexapex:
end of any structure distad to the base
, procoxal cavities open 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 reddish or orange, elytral color pattern absent. 
Legs: visible tarsomerestarsomere:
subdivision or article of the tarsus, usually numbering from two to five
: 4, femora clavateclavate:
thickening gradually toward the tip
, protibial spursprotibial spur:
sclerotized spine(s) located at the distal tibia; can be single, double, or absent
: 2, tarsal clawstarsal claw:
usually paired claws of the pretarsus, at the distal end of the leg
simple.

Similar genera

Callidium

Differential diagnosis

The bright red-orange pubescence on the pronotumpronotum:
the upper and dorsal part of the prothorax
and 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
will differentiate Pyrrhidium from similar Callidiini. Other reddish cerambycines often have non-filiform 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
.

Distribution

western Palearctic

Recorded host plants

broadleaf trees

Remarks

Monotypic genus, Pyrrhidium sanguineum (L.). Has been referred to as a subgenus of Callidium in some older publications. Larvae feed under bark of the branches and trunk (Bense 1995Bense 1995:
Bense U. 1995. Longhorn Beetles. Illustrated Key to the Cerambycidae and Vesperidae of Europe Weikersheim: Margraf, 1995: 1–512, 1260 figs. ISBN 3-8236-1154-2).

Taxonomy

Pyrrhidium Fairmaire, 1868