Bijoaraneus praesignis (L.Koch, 1872) is a animal in the Araneidae family, order Araneae, kingdom Animalia. Not known to be toxic.

Photo of Bijoaraneus praesignis (L.Koch, 1872) (Bijoaraneus praesignis (L.Koch, 1872))
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Bijoaraneus praesignis (L.Koch, 1872)

Bijoaraneus praesignis (L.Koch, 1872)

Bijoaraneus praesignis is an Australian orb-weaving spider with distinctive black abdominal markings thought to be mimicry.

Family
Genus
Bijoaraneus
Order
Araneae
Class
Arachnida

About Bijoaraneus praesignis (L.Koch, 1872)

Based on L. Koch's original description, the female Bijoaraneus praesignis has a dirty brownish-yellow cephalothorax, brown chelicerae tips, and black leg segments on the ends of the metatarsi and tarsi. Adult females reach a maximum body length of 8 mm, while adult males reach approximately 6 mm. The opisthosoma of this species is yellow-brown along its front edge, with yellowish-white markings on the sides and small yellow spots on the underside. B. praesignis has bold black blobs on the rear of its abdomen. These blobs may mimic eyes, forming a type of Batesian mimicry that makes the spider appear more threatening than it actually is. The epigyne is brown. This species has a distinctive feature: two large transverse black oval spots placed before the rear edge of the abdomen. Each of these spots has white dots in its center, and both spots are bordered on either side by a fine curved black line. This species is distributed in Queensland, Australia. The Atlas of Living Australia holds one additional record from New South Wales. B. praesignis builds small orb webs in green shrubs during the night. During the day, it hides in a retreat made by binding a curved green leaf together with silk.

Photo: (c) robertwhyte, some rights reserved (CC BY-NC), uploaded by robertwhyte · cc-by-nc

Taxonomy

Animalia Arthropoda Arachnida Araneae Araneidae Bijoaraneus

More from Araneidae

Sources: GBIF, iNaturalist, Wikipedia, NCBI Taxonomy · Disclaimer

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