Castianeira longipalpa (Ant Mimic Spider)

About Castianeira longipalpa

Taxonomic Hierarchy

→ Kingdom: Animalia
→ Phylum: Arthropoda
→ Class: Arachnida
→ Order: Araneae
→ Family: Corinnidae
→ Genus: Castianeira
→ Species: Castianeira longipalpa

Other Common Names

Antmimic Spider

Author

Author of species name: Nicholas Marcellus Hentz. First year published: 1847, as Herpyllus longipalpus.

Pronunciation

kass-tee-uh-NEE-ruh lon-jih-PAL-puh

Meaning

Castianeira appears to be a Greek proper name meaning “endowed with a pre-eminent husband” (Cameron 2005).

Notable Previous Names

Castianeira longipalpus

Identifying Traits of Castianeira longipalpa

Size

Body length (excluding legs) of adult female ranges from 7-10 mm; adult males range from 5.5-6 mm.

Female Primary Colors

Male Primary Colors

Eye diagram of Castianeira longipalpa

Eyes

Total of eight eyes. When viewed from the front, arranged in two horizontal rows of four; each row slightly procurved and each eye relatively small and equal in size.

Legs

Legs are robust but proportionate to body size. Many visible macrosetae (spines) present, especially on back pair of legs. Back legs (legs IV) longest. Distal segments of front legs yellow or brown, while the femurs are banded in black and white. The tarsi (tips of legs) have only 2 claws.

Body

This is a very distinctive spider. Abdomen is an elongated oval; usually brown, black, or dark red, and with four or more transverse bands of white or yellow hairs. Carapace is pear-shaped; base color is black, brown, or dark red, but usually covered in white or yellow hairs.

Range of Castianeira longipalpa

Castianeira longipalpa can be found in the following states, provinces and territories across the United States and Canada. Our current understanding of each spider's distribution is drawn from numerous scientific publications and online spider submissions, in order to be as accurate as possible. It is important to remember that spiders do not adhere to the territorial lines decided on by humans, therefore these ranges are subject to change.

United States

Canada

Additional Information

Habitat

This is a widespread species that lives in a variety of habitats; typically close to the ground, under rocks and logs, or in leaf litter, but is also occasionally found on (or in) buildings.

Web

This spider does not spin a web for prey capture, but instead hunts “on foot.” It may construct a small, silken retreat underneath rocks and logs, or within leaf litter, for when it is not roaming about for food or mates.

Season

Maturity and mating occurs in summer or fall.

Food

Prey is any insect or other arthropod that the spider is able to run down and subdue.

Lifecycle

Egg sacs are white and shaped like a flattened disk that is plastered to a surface. Montgomery (1909) notes that they contain relatively few eggs (two sacs had only 8 eggs each, and three sacs had 9).

Remarks

Pictures of Castianeira longipalpa

General

Female Spiders

Male Spiders

Filtering options are grayed out when we do not have pictures for the given perspective. If you are a spider photographer, you can submit pictures of spiders to help fill any voids in our ever expanding library.
  • Castianeira longipalpa
  • Maturity: Immature
  • Attributes: Egg Sacs
  • State: Kentucky
  • Country: United States
  • Castianeira longipalpa
  • Maturity: Immature
  • Attributes: Dorsal, Spiderlings
  • City/Region: Lancaster, Worcester County
  • State: Massachusetts
  • Country: United States
  • Castianeira longipalpa
  • Sex: FemaleFemale
  • Maturity: Adult
  • Attributes: Dorsal
  • City/Region: Gloster, Gloster Arboretum, Amite County
  • State: Mississippi
  • Country: United States
  • Castianeira longipalpa
  • Sex: FemaleFemale
  • Maturity: Adult
  • Attributes: Dorsal
  • City/Region: Gloster, Gloster Arboretum, Amite County
  • State: Mississippi
  • Country: United States
  • Castianeira longipalpa
  • Sex: FemaleFemale
  • Maturity: Adult
  • Attributes: Dorsal, Egg Sacs
  • City/Region: Victoria, Vancouver Island, British Columbia
  • Country: Canada
  • Castianeira longipalpa
  • Sex: MaleMale
  • Maturity: Adult
  • Attributes: Dorsal
  • City/Region: Atlanta
  • State: Georgia
  • Country: United States
  • Castianeira longipalpa
  • Sex: MaleMale
  • Maturity: Adult
  • Attributes: Eyes
  • City/Region: Atlanta
  • State: Georgia
  • Country: United States
  • Castianeira longipalpa
  • Sex: MaleMale
  • Maturity: Adult
  • Attributes: Dorsal
  • City/Region: Atlanta
  • State: Georgia
  • Country: United States
  • Castianeira longipalpa
  • Sex: MaleMale
  • Maturity: Adult
  • Attributes: Lateral
  • City/Region: Atlanta
  • State: Georgia
  • Country: United States

References and Further Reading

Various Research Papers

Scientific Diagrams and Keys for Identification

References for the Casual Reader

Species guide last updated: May 29, 2016

Follow Us

Search Spiders.us