Edge Rewrite
everything Source code View original
// HTMLRewriter · presentation

This page was redesigned at the edge.

Cloudflare fetched the original article and streamed it through HTMLRewriter to apply an entirely new visual system without rebuilding the source page.

// request.cf · coarse context

A page that knows where it met you.

Only coarse request metadata is shown. This demo does not display or persist visitor IP addresses.

Country
US
Cloudflare location
CMH
Connection
HTTP/2
Language
Not provided

Ray ID: a23320f3b885b36e

Jump to content

// Workers AI · dad joke modeWhat did Ptocasius say to his date? You're a catch.

From Wikipedia, the free encyclopedia

Ptocasius
female P. strupifer from Hong Kong
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Salticidae
Subtribe: Plexippina
Genus: Ptocasius
Simon, 1885[1]
Type species
P. weyersi
Simon, 1885
Species

67, see text

Ptocasius is a genus of Asian jumping spiders that was first described by Eugène Louis Simon in 1885.[2]

The genus name derives from the Greek word πτωχάς (ptōchas), meaning "fugitive".[2]

male P. strupifer from Hong Kong

Description

[edit]

According to Simon's original 1885 description[2], Ptocasius is similar to the genus Hasarius but can be distinguished by several morphological characteristics. The cephalothorax is nearly identical to Hasarius but the eye area above is slightly longer, being barely one-quarter wider than long and either parallel or slightly wider posteriorly. Both anterior eye rows are convex. The eyes resemble those of Hasarius, but the posterior eyes of the second series are positioned wider apart from the posterior eyes than from the more distant anterior eyes.

The labial part is much more attenuated than in Hasarius. The chelicerae have an inferior margin furnished with two geminated teeth of very unequal size, with the second tooth being much smaller than the first. In males, the maxillae have an external posterior angular denticulation. The legs are similar to those of Hasarius, but the tibiae and metatarsi of legs I and II bear lateral spines on both sides, while tibiae I and II lack dorsal spines. Legs III and IV have a dorsal spine positioned in a smaller basin. The integument is clothed with simple hairs that are not squamiform.

Simon also noted that Ptocasius is closely related to the genus Cytaea but differs in having a shorter and more elevated cephalothorax, chelicerae with a superior margin provided with two teeth as in Hasarius (while Cytaea has four small teeth), two very unequal teeth on the inferior margin, and integuments furnished with simple pubescence rather than the squamous pubescence found in Cytaea.

Species

[edit]

As of August 2025 it contains almost 70 described species, found only in Asia:[1]

References

[edit]
  1. 1 2 "Gen. Ptocasius Simon, 1885". World Spider Catalog Version 26. Natural History Museum Bern. 2025. doi:10.24436/2. Retrieved 25 August 2025.
  2. 1 2 3 Simon, E. (1885). "Arachnides recueillis par M. Weyers à Sumatra. Premier envoi". Annales de la Société Entomologique de Belgique. 29: 30–39.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Ptocasius&oldid=1345663057"