Ground Spider
( Gnaphosidae )


2013-0504-EB060704-ARA01120-Gnaphosidae[1150h07s,F,A,earth]{JHeifetz}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Gnaphosidae
(Pocock ,1898 )
Common Name:Ground Spider
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Arachnida
Order:Araneae
Family:Gnaphosidae
Taxon Code:ARA01120

LOCATION DETAILS
Location Name
Black Diamond Mines Regional Preserve, Black Diamond Mines Regional Preserve, Black Diamond Mines Regional Preserve, 5175 Somersville Rd., Antioch
County:Contra Costa County
ECI Site#:CAEB060700
Open Space Location:Black Diamond Mines Regional Preserve

RECOGNITION
Description
Generally, ground spiders are characterized by having barrel-shaped anterior spinnerets that are one spinneret diameter apart. The main exception to this rule is found in the ant-mimicking genus Micaria. Another characteristic is an indentation in the endites (paired mouthparts anterior and lateral to the labium, or lip).
Diversity
Ground spiders (family Gnaphosidae) include nearly 2,000 described species in over 100 genera, distributed worldwide. This makes the family the seventh largest known. New species are still being discovered. They are closely related to Clubionidae.

BIOLOGY
Diversity
Ground spiders (family Gnaphosidae) include nearly 2,000 described species in over 100 genera, distributed worldwide. This makes the family the seventh largest known. New species are still being discovered. They are closely related to Clubionidae.
Development
Egg sacs are thick-walled and guarded by the mother until the spiderlings hatch.

CREDITS
Photographer
Jared Heifetz

References
Family Gnaphosidae - Ground Spiders. (bugguide.net/node/view/1970). Accessed June 19, 2017. .
Wikipedia (https://en.wikipedia.org/wiki/Ground_spider)


.