Henricus umbrabasana

Type

Native

Taxonomy

Henricus umbrabasana (Kearfott) (Tortricidae: Tortricinae: Cochylini)

Synonyms: umbrabasana (Commophila)

Adult Recognition

FWL: 7.5-9.0 mm

Forewings are yellowish white with a well-defined brown to dark-brown basal patch and a black spot in the median fasciafascia:
a dark transverse band on the forewing
. Males lack a forewing costal foldforewing costal fold:
a flap or fold at the base of the forewing that contains specialized sex scales
. Male genitalia are characterized by uncusuncus:
a sclerotized process which is fused to the posterodorsal margin of tergum IX
absent; sociisocii:
a pair of lightly sclerotized setose lobes
large, setosesetose:
covered with setae
; transtilla with spined medialmedial:
to the middle, center, toward center line
process; and elongate, tapering valvaevalvae:
plural of "valva"
. Female genitalia are characterized by a large, membranous ostiumostium:
see ostium bursae
; short ductus bursaeductus bursae:
a membranous tube connecting the ostium bursae to the corpus bursae
; and corpus bursaecorpus bursae:
a dilated membranous sac at the anterior end of the bursa copulatrix
with numerous minute spines on inner surface.

Larval Morphology

Opler (1974) briefly described the larva, but no detailed descriptions of larval chaetotaxychaetotaxy:
the arrangement of setae (in reference to Lepidoptera larvae), often depicted on a "setal map"
exist.

Mature larvae are dark maroon with a brown or black head and black prothoracic shieldprothoracic shield:
a sclerotized plate on the dorsal surface of the prothorax
.

Similar Species

In California, adult H. umbrabasana are commonly found in Epiphyas postvittana pheromone traps. Distinguishing between individuals of these two species by wing pattern may be difficult if the forewings are heavily stained from sticky traps. The two species can be separated by the male forewing costal foldforewing costal fold:
a flap or fold at the base of the forewing that contains specialized sex scales
: present in E. postvittana, but absent in H. umbrabasana. It could be also confused with Henricus cognata, a similar species found in southern Arizona and Mexico.

Biology

The following account is summarized from Opler (1974)Opler (1974):
Opler, P. A. 1974. Biology, ecology, and host specificity of microlepidoptera associated with Quercus agrifolia (Fagaceae). University of California Press. vol. 75. 83 pp. and Powell (2006)Powell (2006):
Powell, J. A. 2006. Database of Lepidoptera rearing lots, 1960-2005. University of California Berkeley, CA..

Henricus umbrabasana completes a single generation per year. Adults are present from May through September. Eggs are laid during the summer or fall and overwinter until the next spring. Larvae emerge in March and feed on young leaves and shoots inside a shelter covered in frass and debris. Pupation occurs within a cocoon covered in frass and debris. Larvae are only known to feed on oak (Quercus spp.).

Host plant	Host plant family	Reference(s)
Quercus agrifolia	Fagaceae	Opler 1974Opler 1974: Opler, P. A. 1974. Biology, ecology, and host specificity of microlepidoptera associated with Quercus agrifolia (Fagaceae). University of California Press. vol. 75. 83 pp.; Powell 2006Powell 2006: Powell, J. A. 2006. Database of Lepidoptera rearing lots, 1960-2005. University of California Berkeley, CA.
Quercus chrysolepis	Fagaceae	Powell 2006Powell 2006: Powell, J. A. 2006. Database of Lepidoptera rearing lots, 1960-2005. University of California Berkeley, CA.
Quercus lobata	Fagaceae	Powell 2006Powell 2006: Powell, J. A. 2006. Database of Lepidoptera rearing lots, 1960-2005. University of California Berkeley, CA.