Cervinaria Slantline Moth
( Tetracis cervinaria )


2012-0623-01100147-LEP01395-Tetracis_cervinaria[2214h25s,F,A,blacklight]{EXD}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Tetracis cervinaria
(Packard, 1871)
Common Name:Cervinaria Slantline Moth
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Insecta
Superorder:Holometabola
Order:Lepidoptera
Family:Geometridae
Subfamily:Ennominae
Tribe:Ourapterygini
Genus:Tetracis
Taxon Code:LEP01395
ITIS/TSN:943203

LOCATION DETAILS
Location Name
Joaquin Miller Park, Joaquin Miller Park, 3590 Sanborn Drive, Oakland
County:Alameda County
ECI Site#:CA01100147

RECOGNITION
Description
Adult - Medium-sized (typical FWL: 16–26 mm) moths varying in color from white, yellow, ochreous, to dark gray, and chocolate brown. Male antenna nearly filiform (laminate, prismatic or serrate) or bipectinate; female antenna essentially filiform, densely setose ventrally. PM line present, but AM line may be absent; varying patterns of dark maculation may be present. Wing outer margins arcuate at vein M3. No patch of setae or comb on male third abdominal sternite. Ferris and Schmidt, 2010. Wings - Angular and conspicuously pointed, light to dark brown (mimicing autumn leaves) with distinct AM and PM lines. Larva: yellowish to brownish twig mimic with dorsal hump on thorax. DFW apex strongly falcate; males tawny or cinnamon-tan with narrow pale ochre AM and PM lines with or without dark edging, PM line nearly straight, MB frequently darker; females often orange or cinnamon-rufous with well defined brown or brownish-orange AM and PM lines with usually darker MB. DHW with nearly straight median line duplicating color of PM line, in some examples there is a distal indistinct convex dark satellite line originating from the top to the middle of the median line; small FW and HW discal dots are present. Ventrally the dorsal markings are repeated to some degree depending upon individual specimens; there is also a widely distributed speckling by dark scales. Larva: a twig mimic; body light green to greenish-brown; dorsal hump on second thoracic segment; small dorsal wart on abdominal segments four and five.
Wingspan
Forewing length 19-23 mm.

BIOLOGY
One generation per year; overwinters as an egg
Food
Two confirmed hosts in northern California for cervinaria are Prunus emarginata and P. virginiana, Ferris and Schmidt, 2010. Older information indicates larvae may also feed on leaves of alder, Bitterbrush (Purshia tridentata), cascara, Ceanothus species, Madrone (Arbutus menziesii), manzanita (Arctostaphylos spp.), willow. A variety of broad-leaved trees and shrubs.
Habitat
Deciduous, mixed, and coniferous forests and shrublands; adults are nocturnal and attracted to light.
Range
Western United States and southwestern Canada
Flight Period
Adults fly as early as February into June, with female stragglers into mid-July
Development
One generation per year; overwinters as an egg.

CREDITS
Photographer
Eddie Dunbar
Insect Sciences Museum of California

References
Species Tetracis cervinaria - Hodges #6956. (http://bugguide.net/node/view/41963). Accessed March 12, 2016. .
ITIS.


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