TL;DR: Taxonomic and faunistic amendments are provided for 15 species and one subspecies of comb-footed spiders (Th eridiidae) of the Mediterranean region, in the genera Anatolidion, Episinus, Heterotheridion, Th eridion andTh eridula.
Abstract: Taxonomic and faunistic amendments are provided for 15 species and one subspecies of comb-footed spiders (Th eridiidae) of the Mediterranean region, in the genera Anatolidion, Episinus, Heterotheridion, Th eridion and Th eridula. Th e following taxonomic changes are proposed: Anatolidion osmani Wunderlich, 2008 and Th eridion crinigerum Simon, 1881 are synonymised with T. gentile Simon, 1881, making it the type species of the monotypic genus Anatolidion Wunderlich, 2008. Episinus albescens Denis, 1965 is synonymised with E. algiricus Lucas, 1846, Th eridion xinjiangense (Hu & Wu, 1989) with Heterotheridion nigrovariegatum (Simon, 1873). Th eridion aelleni Hubert, 1970 is removed from synonymy of Th eridion spinitarse O. P.-Cambridge, 1876 and transferred to Th eridula. Th e recent transfer of Th eridion pinicola Simon, 1873 and T. genistae Simon, 1873 into Paidiscura has to be rejected. Th eridion genistae turanicum Charitonov, 1946 from Uzbekistan is raised to species level. New faunistic records are presented for Th eridion pinicola from North Africa, Anatolidion gentile, Th eridion genistae and T. hemerobium from Greece. Several poorly known (sub-)species are redescribed: Anatolidion gentile, Episinus maculipes numidicus Kulczyński, 1905, Th eridion genistae, T. glaucinum Simon, 1881, T. musivum Simon, 1873, T. pinicola, T. pyrenaeum Denis, 1944, T. semitinctum Simon, 1914 and T. spinitarse O.
Abstract: Fossil inclusions in Mexican amber have been poorly studied to date. The fossil spider Episinus penneyi sp. n. (Theridiidae) is described from a mature male preserved in Tertiary (Miocene: 15–20 Ma) amber from Chiapas, Mexico and is most closely related to an extant species from Panama. It represents the first record of an extant theridiid genus from Mexican amber and adds a new locality record for this genus to the tertiary fossil fauna. Given the similarity of the Hispaniolan fossil (Dominican amber: Miocene: 15–20 Ma) and extant faunas and their proximity geographically and temporally to the Mexican fossil and extant faunas, the new species supports the idea that fossil and extant Mexican faunas may also show close similarities.
TL;DR: The monophyly of Spintharinae is supported in agreement with previous analysis of Theridiidae by Agnarsson and Arnedo et al. with Stemmops as sister to a clade that includes the remaining ingroup taxa.
Abstract: The monophyly of Spintharinae is supported in agreement with previous analysis of Theridiidae by Agnarsson and Arnedo et al. We study the relationships of the genera within Spintharinae. Fourteen species in the genera Chrosiothes, Episinus, Spintharus, Steninops, and Thwaitesia constituted the ingroup, while five species from the genera Euryopis and Dipoena (Hadrotarsinae), as well as Latrodectus and Steatoda (Latrodectinae), served as outgroup taxa. The character matrix included 49 morphological characters. Parsimony analyses using several character weighting strategies supported the monophyly of Spintharinae with Stemmops as sister to a clade that includes the remaining ingroup taxa. Chrosiothes emerged as sister to Episinus + Spintharus + Thwaitesia which formed a polytomy. The equally weighted, successive weighted, and preferred implied weight topologies, were all logically consistent. A key to the genera of Spintharinae and diagnoses for each genus are given.