About Eresus moravicus Řezáč, 2008
Eresus moravicus Řezáč, 2008 is the largest Eresus species found in Central Europe. Males of this species are patterned black and red: their first two legs are black, their last two legs are red, their carapace is black, and their opisthosoma is red. Females are mostly black, with the only exception being orange hairs on a section of the prosoma. E. moravicus can be distinguished from two other related species by the male’s red hind legs and the female’s orange prosomal hairs, alongside other identifying features. Distinguishing this species from Mediterranean species that share these traits relies on species-specific characteristics. It can be told apart from E. ruficapilus by E. ruficapilus’s backward-tapered prosoma. E. fulvous is larger than E. moravicus, has longer yellow hairs that cover almost the entire cheliceral segments, and has a less lobed spermatheca. E. ignicomis is larger than E. moravicus, and its orange hair coverage is less consistent, typically only appearing as spots. E. tricolor differs from E. moravicus by having white spots on the opisthosoma.
