Trashline Orb Weaver
( Cyclosa conica )


2010-0215-EB070001-ARA01202-Cyclosa_conica[1351h11s,F,A,web]{EXD}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Cyclosa conica
(Pallas, 1772)
Common Name:Trashline Orb Weaver
Life Stage:A

PHYLOGENY

Phylum:Arthropoda
Class:Arachnida
Order:Araneae
Family:Araneidae
Genus:Cyclosa
Taxon Code:ARA01202
ITIS TSN#:854361

LOCATION DETAILS
Location
Crescent Ridge Trail, Briones Regional Park, Lafayette
County:Contra Costa County
ECI Site#:CAEB070000
Park/Forest:Briones Regional Park

RECOGNITION
This orb weaver has overlapping ranges with C. turbinata. Both are dark, but C. conica may be orangish in color; C. turbinata will not. C. conica also lacks the pair of dorsal abdominal protuberances that are characteristic of C. turbinata and has one tubercle (hump) at the rear of the abdomen.
Body Length
(F) 5.3-7.5 mm; (M) 3.6-4 mm.
Similar Taxa
Cyclosa turbinata
Colors
Dark, but may be orangish.

BIOLOGY
Nesting
This spider has the unusual habit of lining its web with its own feces and the dead bodies of insects it has eaten. Its webs are orb-shaped, about a foot in diameter and "trash" is lined on the vertical line of web (stabilimentum) at the web's center. The spider sits amongst its trash and is camouflaged.
Development
Young mature from mid-May to summer. Egg sac is round and golden yellow.
Range
Widespread in America north of Mexico, but uncommon in the southeastern U.S. and the southern half of the Great Plains.

HABITAT

CREDITS
Photographer
Eddie Dunbar

REFERENCES
  • Species Cyclosa conica. (http://bugguide.net/node/view/38514). Accessed March 12, 2016. [ IMAGES ]
  • Integrated Taxonomic Information System TSN#854361


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