Latest Articles from Evolutionary Systematics Latest 4 Articles from Evolutionary Systematics https://evolsyst.pensoft.net/ Thu, 28 Mar 2024 23:49:08 +0200 Pensoft FeedCreator https://evolsyst.pensoft.net/i/logo.jpg Latest Articles from Evolutionary Systematics https://evolsyst.pensoft.net/ Two new species of the spider genus Loxosceles (Araneae, Sicariidae) from the Ecuadorian Andes https://evolsyst.pensoft.net/article/107213/ Evolutionary Systematics 8(1): 1-14

DOI: 10.3897/evolsyst.8.107213

Authors: Nadine Dupérré, Danilo Harms, Verónica Crespo-Pérez, Elicio Tapia

Abstract: Two new species of the spider genus Loxosceles (Araneae: Sicariidae) from the Ecuadorian Andes are described: Loxosceles guayllabamba sp. nov. (male, female) and Loxosceles binfordae sp. nov. (male, female). Both species are part of the second most speciose “laeta” group, which include twenty-four described species. Only three species are known to occur on mainland Ecuador, and one species in the Galapagos. The synonymy of L. alicea under L. rufescens is rejected, detailed SEM of the female internal genitalia and a map of all the species from mainland Ecuador are presented.

HTML

XML

PDF

]]>
Research Article Wed, 10 Jan 2024 18:27:19 +0200
A new species of Ninia (Serpentes, Colubridae) from western Ecuador and revalidation of N. schmidti https://evolsyst.pensoft.net/article/112476/ Evolutionary Systematics 7(2): 317-334

DOI: 10.3897/evolsyst.7.112476

Authors: Alejandro Arteaga, Kyle J. Harris

Abstract: We describe a new species of Ninia Baird & Girard, 1853 endemic to the cloud forests of northwestern Ecuador. The new species has previously been confused with N. atrata (Hallowell, 1845) and N. teresitae (Angarita-Sierra and Lynch 2017) but is genetically most closely related to a third species of Ninia endemic to the Chocoan–Tumbesian transition area of western Ecuador. We revalidate the name N. schmidti (Jan, 1862), designate a neotype, and provide a diagnosis of the taxon and a description of its hemipenial morphology based on new material. The new and revalidated species can easily be identified from one another and from other trans-Andean South American Ninia based on ventral and subcaudal scale counts, hemipenial morphology, and coloration of the supralabials, throat, and belly. Finally, we remove N. atrata from the herpetofaunal list of Ecuador.

HTML

XML

PDF

]]>
Research Article Thu, 7 Dec 2023 15:22:09 +0200
A new species of spiny-backed tree frog, genus Osteocephalus (Anura, Hylidae), from the Yanachaga Chemillén National Park in central Peru https://evolsyst.pensoft.net/article/102360/ Evolutionary Systematics 7(2): 237-251

DOI: 10.3897/evolsyst.7.102360

Authors: Pablo J. Venegas, Luis A. García-Ayachi, Eduardo Toral, José Malqui, Santiago R. Ron

Abstract: We describe a new species of Osteocephalus Fitzinger, 1843 using morphological traits of adult frogs and its larvae, as well as molecular evidence. The new species occurs in the premontane forest of the Cordillera del Yanachaga in the Andes of central Peru, at elevations between 1000 and 1150 m a.s.l. It belongs to the Osteocephalus mimeticus species group and is the sister species of O. mimeticus. It is most similar to three species with predominantly dark irises, tuberculate dorsal skin, and brown dorsal coloration: O. festae Peracca, 1904, O. mimeticus Melin, 1941, and O. verruciger Werner, 1901. Of these three species, the most similar is O. mimeticus. However, the new species can be easily distinguished from O. mimeticus by having a cream or creamy-tan venter with a well-defined pattern of brown chocolate blotches and flecks (venter cream, tan, or brown without marks in O. mimeticus). The tadpoles of O. vasquezi sp. nov. are strikingly different from the tadpoles of O. mimeticus by having a larger oral disk with nine lower labial tooth rows (only six in O. mimeticus). Tadpoles of the new species and those of O. festae are unique among Osteocephalus by belonging to the suctorial ecomorphological guild as shown by their large oral disks. Our time tree suggest that the new species diverged from its sister species at the beginning of the Pleistocene, ~2.5 million years ago.

HTML

XML

PDF

]]>
Research Article Thu, 6 Jul 2023 19:32:48 +0300
The goblin spiders (Araneae, Oonopidae) of the OTONGA Nature Reserve in Ecuador, with the description of seven new species https://evolsyst.pensoft.net/article/14969/ Evolutionary Systematics 1(1): 87-109

DOI: 10.3897/evolsyst.1.14969

Authors: Nadine Dupérré, Elicio Tapia

Abstract: The goblin spiders (Araneae, Oonopidae) of the Otonga Nature Reserve in the Chocó region of Ecuador are reviewed. A total of 1034 adult specimens were collected in 2014 and 23 morphospecies in eight different genera were identified from these collections. We describe seven new species: one in the genus Niarchos Platnick & Dupérré: Niarchos normani sp. n.; three in Scaphidysderina Platnick & Dupérré: Scaphidysderina chirin sp. n., S. lubanako sp. n., S. tsaran sp. n.; two in Bipoonops Bolzern: Bipoonops lansa sp. n., B. pilan sp. n.; and one in Reductoonops Platnick & Berniker: Reductoonops berun sp. n. The males of Niarchos baehrae Platnick & Dupérré, 2010 and Orchestina yanayacu Izquierdo, 2017 are described here for the first time. Natural history and collecting data are given for all morphospecies collected, including Niarchos barragani Platnick & Dupérré, 2010, Scaphidysderina cotopaxi Platnick & Dupérré, 2011, Scaphidysderina pinocchio Platnick & Dupérré, 2011, Orchestina otonga Izquierdo, 2017, Orchestina santodomingo Izquierdo, 2017, Orchestina truncata Wunderlich, 2004, Reductoonops otonga Platnick & Berniker, 2014, Reductoonops pichincha Platnick & Berniker, 2014, Paradysderina fusiscuta Platnick & Dupérré, 2011, Scaphiella pich Platnick & Dupérré, 2010 and Tinadyserina otonga Platnick et al., 2013. The data show that oonopid spiders are a major element of the arachnofauna present in the Chocó neotropical forests.

HTML

XML

PDF

]]>
Research Article Fri, 22 Dec 2017 16:10:20 +0200