Ami armihuariensis sp. nov. from Cuzco region, Peru is described, diagnosed and figured. Males of Ami armihuariensis sp. nov. differ from all other congeners, except A. pijaos, by the presence of only one retrolateral process on male palpal tibia, from A. pijaos by the granulation in tegular area of male palpal bulb. Additionally,  photographs of A. yupanquii spermatheca  are for the first time presented in order to emphasize the characteristic shape of spermathecae in this genus.

Bistriopelma gen. nov. from the Andean region in Peru is here described, diagnosed and illustrated, together with two new species Bistriopelma lamasi sp. nov. as a type species and Bistriopelma matuskai sp. nov. This new genus differs from all other theraphosid genera, except the genus Phrixotrichus Simon 1889 (sensu Perafán & Pérez-Miles 2014) and the troglobite species Tmesiphantes hypogeus Bertani, Bichuette & Pedroso 2013, in the presence of two abdominal dorsolateral patches of the type III urticating setae. Bistriopelma gen nov. can be distiguished from Phrixotrichus by the different shape of spermathecae in females, consisting of two separate subparallel seminal receptacles in Bistriopelma gen. nov. but strongly divergent in Phrixotrichus and by the different morphology of male palpal bulb (embolus projecting retrolaterally from tegulum in Bistriopelma gen. nov. against ...

The male of Bistriopelma matuskai Kaderka 2015 is described and illustrated, the species is rediagnosed and complemented by new biogeographical data. Additionally, a new species of Bistriopelma, B. titicaca sp. nov., from the Puno region in Peru is described, diagnosed and illustrated. An updated general description and distribution map of Bistriopelma are provided.

A female of Cyriocosmus giganteus Kaderka 2016 is described and illustrated for the first time, a new diagnosis of this species is proposed. Cyriocosmus paredesi sp. nov. from Quebrada Putuiman (Marañon River) and Cyriocosmus foliatus sp. nov. from Umaral near Iquitos, both from Loreto Department in Peru, are described, diagnosed, illustrated and keyed. The male of Cyriocosmus sellatus (Simon 1889) from Rio Blanco, the tributary of Rio Tahuyao, Loreto Department in Peru, is redescribed and figured. The distribution area of this species is updated, and difficulties in the identification of this species are discussed.

Neischnocolus iquitos sp. nov. from Loreto region, Peru, is described, diagnosed and figured. Males of N. iquitos sp. nov. differ from all known congeners in the presence of two retrolateral processes on palpal tibia, in combination with the presence of a retrolateral keel on embolus and the absence of granulation or microspikes on embolus or tegulum. Females of N. iquitos sp. nov. differ from all known Neischnocolus females in the morphology of the genitalia consisting of a lower sclerotized part with two short, separate seminal receptacles, and an upper part, which is transparent and notched. ________________________________________________________________Publicación registrada en Zoobank/ZooBank article registered:LSIDurn:lsid:zoobank.org:pub:4854FB77-99B5-4208-9394-DBA7BB5EC64FActo nomenclatural/nomenclatural act:Neischnocolus iquitos Kaderka, 2020LSIDurn:lsid:zoobank.org:act:F5FB8A...

The monotypic Peruvian genus Anqasha with type species Anqasha picta (Pocock 1903) is revised. A female of A. picta from the type locality of Caraz is herein described for the first time. The recently described females of A. picta coming from Recuay are transferred to the new taxon, which is herein described, diagnosed, and illustrated. Males of A. minaperinensis sp. nov. differ from that of A. picta in the shape of retrolateral branch of subapical apophyses on male tibia I, which is apically flattened and having three short spines. Females of A. minaperinensis sp. nov. differ from A. picta in the shape of seminal receptacles. LSIDurn:lsid:zoobank.org:pub:5ACC070E-ED16-4FBE-B6B5-F8EFC0FED2C7Acto nomenclatural/nomenclatural act:Anqasha minaperinensis Kaderka, 2023LSIDurn:lsid:zoobank.org:act:99084678-F808-434C-80AE-A101C4338C85

Ami armihuariensis sp. nov. from Cuzco region, Peru is described, diagnosed and figured. Males of Ami armihuariensis sp. nov. differ from all other congeners, except A. pijaos, by the presence of only one retrolateral process on male palpal tibia, from A. pijaos by the granulation in tegular area of male palpal bulb. Additionally,  photographs of A. yupanquii spermatheca  are for the first time presented in order to emphasize the characteristic shape of spermathecae in this genus.

Bistriopelma gen. nov. from the Andean region in Peru is here described, diagnosed and illustrated, together with two new species Bistriopelma lamasi sp. nov. as a type species and Bistriopelma matuskai sp. nov. This new genus differs from all other theraphosid genera, except the genus Phrixotrichus Simon 1889 (sensu Perafán & Pérez-Miles 2014) and the troglobite species Tmesiphantes hypogeus Bertani, Bichuette & Pedroso 2013, in the presence of two abdominal dorsolateral patches of the type III urticating setae. Bistriopelma gen nov. can be distiguished from Phrixotrichus by the different shape of spermathecae in females, consisting of two separate subparallel seminal receptacles in Bistriopelma gen. nov. but strongly divergent in Phrixotrichus and by the different morphology of male palpal bulb (embolus projecting retrolaterally from tegulum in Bistriopelma gen. nov. against ...

The male of Bistriopelma matuskai Kaderka 2015 is described and illustrated, the species is rediagnosed and complemented by new biogeographical data. Additionally, a new species of Bistriopelma, B. titicaca sp. nov., from the Puno region in Peru is described, diagnosed and illustrated. An updated general description and distribution map of Bistriopelma are provided.

A female of Cyriocosmus giganteus Kaderka 2016 is described and illustrated for the first time, a new diagnosis of this species is proposed. Cyriocosmus paredesi sp. nov. from Quebrada Putuiman (Marañon River) and Cyriocosmus foliatus sp. nov. from Umaral near Iquitos, both from Loreto Department in Peru, are described, diagnosed, illustrated and keyed. The male of Cyriocosmus sellatus (Simon 1889) from Rio Blanco, the tributary of Rio Tahuyao, Loreto Department in Peru, is redescribed and figured. The distribution area of this species is updated, and difficulties in the identification of this species are discussed.

Neischnocolus iquitos sp. nov. from Loreto region, Peru, is described, diagnosed and figured. Males of N. iquitos sp. nov. differ from all known congeners in the presence of two retrolateral processes on palpal tibia, in combination with the presence of a retrolateral keel on embolus and the absence of granulation or microspikes on embolus or tegulum. Females of N. iquitos sp. nov. differ from all known Neischnocolus females in the morphology of the genitalia consisting of a lower sclerotized part with two short, separate seminal receptacles, and an upper part, which is transparent and notched. ________________________________________________________________Publicación registrada en Zoobank/ZooBank article registered:LSIDurn:lsid:zoobank.org:pub:4854FB77-99B5-4208-9394-DBA7BB5EC64FActo nomenclatural/nomenclatural act:Neischnocolus iquitos Kaderka, 2020LSIDurn:lsid:zoobank.org:act:F5FB8A...

A new species of Bistriopelma Kaderka 2015, Bistriopelma fabianae sp. nov., from the Arequipa region in southern Peru is described, diagnosed, and illustrated. Specimens were found in a Queñua forest (Polylepis rugulosa Bitter) spread out on the slopes of Pichu Pichu volcano in the buffer zone of Salinas and Aguada Blanca National Reserve. Biological and ecological data of B. fabianae sp. nov. are provided as well as notes on B. kiwicha and B. peyoi, two new species recently described from Apurimac and Cusco regions. Publicación registrada en Zoobank/ZooBank article registered:LSIDurn:lsid:zoobank.org:pub:BB9DF4D9-6684-46AF-9D15-71FEC64CD032Acto nomenclatural/nomenclatural act:Bistriopelma fabianae Quispe-Colca and Kaderka, 2020LSIDurn:lsid:zoobank.org:act:B63485CD-C00D-4E93-AF02-914AD9A566DA

A new species of Bistriopelma Kaderka 2015, Bistriopelma fabianae sp. nov., from the Arequipa region in southern Peru is described, diagnosed, and illustrated. Specimens were found in a Queñua forest (Polylepis rugulosa Bitter) spread out on the slopes of Pichu Pichu volcano in the buffer zone of Salinas and Aguada Blanca National Reserve. Biological and ecological data of B. fabianae sp. nov. are provided as well as notes on B. kiwicha and B. peyoi, two new species recently described from Apurimac and Cusco regions. Publicación registrada en Zoobank/ZooBank article registered:LSIDurn:lsid:zoobank.org:pub:BB9DF4D9-6684-46AF-9D15-71FEC64CD032Acto nomenclatural/nomenclatural act:Bistriopelma fabianae Quispe-Colca and Kaderka, 2020LSIDurn:lsid:zoobank.org:act:B63485CD-C00D-4E93-AF02-914AD9A566DA