Dictis striatipes
L. Koch, 1872
Striped Spitting Spider
Dictis striatipes is a spitting spider in the Scytodidae, known for the "Striped Spitting Spider." The has been introduced to regions outside its native range, including Hawaii, Mexico, and Yemen. As a member of Scytodidae, it possesses the characteristic spitting ability that defines this family—immobilizing prey by ejecting a mixture of silk, venom, and adhesive from the . It is a species often found in human-modified environments.
Pronunciation
How to pronounce Dictis striatipes: //ˈdɪktɪs striˈæ.tɪˌpiːz//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
The striped leg pattern distinguishes Dictis striatipes from other Dictis and most other Scytodidae. The arrangement—three pairs forming a strongly curved row with the pair largest—is diagnostic for Scytodidae. The species can be separated from the widespread Scytodes thoracica by the leg striping and more tropical distribution. Examination of genitalia may be required for definitive identification.
Appearance
Medium-sized spitting spider with a distinctive striped pattern on the legs, reflected in the specific epithet "striatipes" (striped foot). The body is relatively small and compact with the elevated typical of Scytodidae. The six are arranged in three pairs, a diagnostic feature of the . The is often globular with variable patterning.
Habitat
Found in tropical and subtropical regions; often in human-modified environments including buildings, gardens, and agricultural areas. The shows tendencies, having established outside its native range through human transport.
Distribution
Native to tropical Asia, with confirmed records from India and Thailand. Introduced and established in Hawaii (USA), Mexico, and Yemen. The ' spread appears linked to human commerce and transport.
Diet
Feeds on small arthropods including insects and other spiders. As a spitting spider, it immobilizes prey by ejecting a sticky, venom-laden silk mixture that glues prey to the substrate before approaching to deliver a venomous bite.
Behavior
Exhibits the characteristic spitting of Scytodidae: from a distance of 10–20 mm, it ejects zigzag strands of glue-coated silk combined with venom to immobilize prey. The spider often performs a characteristic swaying motion before spitting. It is a slow-moving, hunter that does not build capture webs.
Ecological Role
of small arthropods; may help control pest insect in environments. Its introduced populations may compete with native spider fauna.
Human Relevance
Beneficial in controlling household and agricultural pests in tropical regions. Its nature and introduction to new regions demonstrate its adaptability to human environments. Not considered medically significant to humans.
Similar Taxa
- Scytodes thoracicaWidespread spitting spider lacking leg stripes; has more uniform coloration and temperate distribution
- Other Dictis speciesRequire examination of genitalia for separation; most lack the distinct leg striping
More Details
Synanthropy and introduction
The has been documented as introduced in multiple regions, suggesting it readily establishes in new tropical and subtropical areas through human-mediated transport.