Leaf Beetle
( Chrysomelidae )


2014-0504-38000003-COL02044-Chrysomelidae[1041h02s,F,A,plant-flower-seasidedaisy]{EXD}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Chrysomelidae
(Latreille, 1802)
Common Name:Leaf Beetle
Life Stage:A

PHYLOGENY

Phylum:Arthropoda
Class:Insecta
Superorder:Holometabola
Order:Coleoptera
Suborder:Polyphaga
Family:Chrysomelidae
Taxon Code:COL02044
ITIS TSN#:114509

LOCATION DETAILS
Location
Green Hairstreak Corridor, Green Hairstreak Corridor, 2290 14th Ave (Herbert Hoover Middle School), San Francisco
County:San Francisco County
ECI Site#:CA38000000

RECOGNITION
Leaf beetles are partially recognizable by their tarsal formula, ovular form in dorsal view and typical dome body shape. Legs: Tarsal formula appears to be 4-4-4, but is actually 5-5-5 as the 4th tarsal segment is very small and hidden by the 3rd. Antennae: In most the antennae are notably shorter than the head, thorax and abdomen, and not more than half their combined length. The first segment of the antenna in most cases is larger than the following ones. The second antennal segment is of normal size (which differentiates leaf beatles from the closely related longhorn beetles). In most species, the antennal segments are of a more or less equal shape, at most they gradually widen towards the tip. Color: Some are conspicuously colored, typically in glossy yellow to red or metallic blue-green hues, and some (especially Cassidinae) have spectacularly bizarre shapes. They often possess a metallic luster or multiple colors. Head: In some subfamilies the head is covered by the pronotum. Thorax: The pronotum varies, but in most it is slightly to highly domed and trapezoidal to rounded-squarish in dorsal view.
Body Length
Most 1-18 mm in length. Others, including exotics up to 35 mm.

BIOLOGY
Most North American species are probably univoltine.
Food
Chrysomelids are phytophagous and are among the most diverse and conspicuous insect families on plants. Most are fairly specific in host preferences, being either monophagous or more commonly oligophagous.The adults feed on living plant material, usually consuming leaves or sometimes various flower parts including pollen. Many chrysomelid larvae feed on leaves, but a great number are subterranean, attacking roots and underground stems.
Development
Most Nearctic species overwinter as adults. Larvae have a wide variety of life histories.
Importance
A fair number of leaf beetles are of economic importance; some are used to control invasive weeds.
Distribution
Throughout the world except the antarctic and most of the high arctic.

HABITAT

CREDITS
Photographer
Eddie Dunbar

REFERENCES
  • Family Chrysomelidae - Leaf Beetles. (bugguide.net/node/view/180). Accessed July 18, 2016. [ IMAGES ]
  • Integrated Taxonomic Information System TSN#114509
  • Leaf beetle. (https://en.wikipedia.org/wiki/Leaf_beetle). Accessed July 18, 2016.


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