New species Eresus rubrocephalus exhibits distinct red coloring in males, suggesting unique adaptations in Araneae, indicating biodiversity significance.
According to our current knowledge, the prothorax of male spiders belonging to the genus Eresus is covered with black hairs. However, during our collection activities in Morocco, we found male specimens showing habitus that can be clearly distinguished from the previously known species based on their pars cephalica of prosoma covered with distinct red hairs. Diagnostic drawings and digital photographs of male copulatory organs, alongside DNA and COI barcoding results, are also presented.
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Gál et al. (2025) studied this question.
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