Native
Exotic
Gymnandrosoma consists of nine described species, all restricted to the New World. Adults are dark brown to black, usually with indistinct markings. Diagnostic genitalic characters include: male with uncusuncus:
a sclerotized process which is fused to the posterodorsal margin of tergum IX
and sociisocii:
a pair of lightly sclerotized setose lobes
undeveloped, valvavalva:
an appendage flanking the intromittent organ that is used to clasp the female during copulation 
with moderately constricted neck, cuculluscucullus:
the distal portion of the male valva
with rounded apexapex:
the point furthest removed from the base or at the end of the costal area 
and short stout setae evenly distributed along distaldistal:
farthest from body, distant from point of attachment
margin, and medialmedial:
to the middle, center, toward center line 
surface with ridge of stout setae near ventralventral:
lower, to the bottom, on the under side
margin from neck to anal angleanal angle:
on the hind wing, the angle nearest the end of the abdomen when the wings are expanded 
; female with two large thorn-like signasigna:
plural of "signum"
in the corpus bursaecorpus bursae:
a dilated membranous sac at the anterior end of the bursa copulatrix
and extensive wrinkling of the membrane near the juncture with the ductus bursaeductus bursae:
a membranous tube connecting the ostium bursae to the corpus bursae
. Most males have secondary sex scaling on the abdomen, terga, hind tibia, and/or anal marginanal margin:
see anal angle 
on the hindwing. Adamski and Brown (2001) provide the most recent revision of the genus.
Larvae are similar to other species in the Cryptophlebia-Ecdytolopha group, with an enlarged L-pinaculum on the prothoraxprothorax:
the most anterior thoracic segment
that extends beneath (and usually beyond) the spiracle. Larvae of Gymnandrosoma can be separated from those of Ecdytolopha by the distance between the V setae on A9: approximately the same as the distance between Vs on A8 in Ecdytolopha and 1.2-2.0 times the distance between Vs on A8 in Gymnandrosoma.
Gymnandrosoma larvae (including G. aurantianum) are intercepted frequently on a variety of imports from Central America, South America, and the Caribbean. As most species were placed in Ecdytolopha prior to Adamski and Brown’s revision (2001), many interception records for Gymnandrosoma are listed under Ecdytolopha.
Exotic species
Gymnandrosoma aurantianum
Gymnandrosoma leucothorax
Native species
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