Cobweb Spider

Sample information

Picture
Entry by: Ava B
Location
Collection date 12/12/2025
Captive / Cultivated? Wild-caught
Group Coalinga High School
Observations

Spider found dead in corner of patio in web. Found & collected at about 12:00am. Temp reports to be around 36°F. No other spiders or webs in the area. Spider about 3-4 mm in length. Spider is light brown with large pedipalps. Spider is not hairy, but not smooth. Appearance matches Theridiidae spiders.

Putative identification Arthropoda Arachnida Araneae Theridiidae

Methods

Extraction kit DNeasy (Qiagen)
DNA extraction location Abdomen
Single or Duplex PCR Single Reaction
Gel electrophoresis system MiniOne
Buffer TBE
DNA stain GelGreen
Gel images
Protocol notes

Results

Wolbachia presence No
Confidence level High
Explanation of confidence level

Arthropod gel shows band in all lanes excluding water, so we know PCR worked. Wolbachia controls showed expected results.

Wolbachia 16S sequence
Arthropod COI sequence
Summary The Theridiidae was found to be negative for Wolbachia.
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