Abstract The present work aims to describe the first troglobitic terrestrial isopod (Oniscidea) from Peru. Caecopactes chullachaqui sp. nov. is described from Cueva de Palestina, Department of San Martín. The new species constitutes the third troglobitic taxon known for the country and extends the knowledge of the distribution of the genus. Oniscidea (Oniscidea Peru sp nov Palestina Martín genus

Abstract The genus Trichorhina Budde-Lund, 1908 includes 70 species distributed mainly in tropical regions, of which three species have been recorded from Colombia: Trichorhina bermudezae Carpio-Díaz, López-Orozco and Campos-Filho, 2018, Trichorhina heterophthalma Lemos de Castro, 1964, and Trichorhina papillosa (Budde-Lund, 1893). The present work aims at describing Trichorhina navasi n. sp. from La Playa de Belén, Department of Norte de Santander. In addition, it provides the first record of terrestrial isopods in the Department of Norte de Santander.

Abstract Two species of Oniscidea are recorded for the state of Paraíba for the first time. Cubaris murina Brandt, 1833 from Campina Grande and Cabaceiras and Porcellionides pruinosus (Brandt, 1833) from Campina Grande. Moreover, Alloniscus buckupi Campos-Filho & Cardoso, 2018 and Atlantoscia floridana (Van Name, 1940) have their distribution extended, and a short discussion about the record of A. buckupi in a semiarid area is provided.

Abstract Two species of bopyrid isopods from the subfamily Athelginae are recorded from new localities in northeastern Brazil. Parathelges foliatus Markham, 1972 was recorded for the first time from Brazil, in the state of Ceará, parasitising the hermit crab Clibanarius symmetricus (Randall, 1840). Pseudostegias atlantica Lemos de Castro, 1965 is recorded from the state of Ceará, parasitising Clibanarius antillensis Stimpson, 1859. Illustrations, species diagnosis and an updated distribution map are given for each species.

Abstract The genus Novamundoniscus includes eight species with distribution in Brazil and Venezuela. The new species Novamundoniscus adhara Campos-Filho & Cardoso sp. nov. from the state of Tocantins, northern Brazil, is described, which represents the first record to the family for the state of Tocantins.

ABSTRACT The genus Alloniscus Dana, 1854 includes 23 known species occurring exclusively in littoral habitats. The genus has never been recorded from the Atlantic coastal region of the Americas. This work describes the new species Alloniscus buckupi n. sp. from João Pessoa, Paraíba, Brazil, and provides the first record of the genus from the Atlantic coastal region.

Abstract All species of Brazilian terrestrial isopod known up to date, including references and distribution information, are listed. The list comprises 189 valid species, 135 of which are endemic to the country, 22 are recorded also from other countries in the Americas, 20 are introduced, and 12 have circumtropical or pantropical distributions.

Abstract A new species of Pulmoniscus Leistikow, 2001 from Department of Bolívar, Colombia, is described. It constitutes the first record of the genus for the country and for the continental portion of the Neotropics. Pulmoniscus turbanaensis n. sp. is distinguished by the male pereopod 7 ischium with concave sternal margin and the shape of the male pleopod 1. In addition, ecological remarks and a distribution map are provided.

RESUMO. Uma grande coleção de isópodes terrestres de diferentes regiões brasileiras foi examinada. Duas novas espécies de Amazoniscus Lemos de Castro, 1967 (Scleropactidae) são descritas: A. zimmeri Campos-Filho, Montesanto & Araujo sp. nov. proveniente do Estado do Pará e A. schmidti Campos-Filho, Montesanto & Taiti sp. nov. do Estado de Minas Gerais. Pseudotyphloscia alba (Dollfus, 1898) (Philosciidae) tem o seu primeiro registro para o Brasil. A posição sistemática de Venezillo tuberosus (Budde-Lund, 1904) é discutida e transferida para Ctenorillo Verhoeff, 1942. Androdeloscia lejeunei (Lemos de Castro & Souza, 1986) e Diploexochus echinatus Brandt, 1833 do Estado do Pará, são redescritas.

ABSTRACT. A large collection of terrestrial isopods from different Brazilian regions was examined. Two new species of Amazoniscus Lemos de Castro, 1967 (Scleropactidae) are described: A. zimmeri Campos-Filho, Montesanto & Araujo sp. nov. from the state of Pará and A. schmidti Campos-Filho, Montesanto & Taiti sp. nov. from the state of Minas Gerais. Pseudotyphloscia alba (Dollfus, 1898) (Philosciidae) is firstly recorded from Brazil. The systematic position of Venezillo tuberosus (Budde-Lund, 1904) is discussed and transferred to Ctenorillo Verhoeff, 1942. Androdeloscia lejeunei (Lemos de Castro & Souza, 1986) and Diploexochus echinatus Brandt, 1833 from the state of Pará, are redescribed.

ABSTRACT A second amphibian species of terrestrial isopods in the genusXangoniscus Campos-Filho, Araujo & Taiti, 2014 and two new species of Trichorhina Budde-Lund, 1908 are described from the Bambuí karst area in the state of Minas Gerais. Xangoniscus odara n. sp. and Trichorhina cipoensis n. sp. were collected in Lapa do Cipó cave, municipality of Itacarambi, andTrichorhina pataxosi n. sp. in Gruta do Sufoco and Gruta do Nei, municipality of Pedro Leopoldo.

ABSTRACT The genus Trichorhina Budde-Lund, 1908 in Brazil includes 22 described species, four of which occur in caves. The present work aims at describing the first cave species for the state of Paraná. Trichorhina kaingangi n. sp. was collected in Água Boa cave, municipally of Almirante Tamandaré, and Ermida Paiol do Alto cave, municipally of Adrianópolis, both in the Açungui karst area.

O gênero Benthana atualmente inclui 25 espécies com distribuição para o Brasil e Paraguai. Neste trabalho é descrita uma nova espécie para o estado de Santa Catarina, sul do Brasil e fornece novos registros para Benthana cairensis Sokolowicz, Araujo & Boelter, 2008, Benthana longicornis Verhoeff, 1941, Benthana moreirai Lemos de Castro, 1985, Benthana picta (Brandt, 1833), Benthana serrana Araujo & Lopes, 2003, e Benthana taeniata Araujo & Buckup, 1994.

The genus Benthana includes 25 species with distribution in Brazil and Paraguay. In this paper we describe a new species from the state of Santa Catarina, southern Brazil, and provide new records for Benthana cairensis Sokolowicz, Araujo & Boelter, 2008, Benthana longicornis Verhoeff, 1941, Benthana moreirai Lemos de Castro, 1985, Benthana picta (Brandt, 1833), Benthana serrana Araujo & Lopes, 2003, and Benthana taeniata Araujo & Buckup, 1994.

To date the genus Atlantoscia Ferrara and Taiti, 1981 includes two species, A. floridana (van Name, 1940) and A. rubromarginata Araujo and Leistikow, 1999. The species Atlantoscia petronioi sp.n. is described on the basis of material collected in a coastal dune forest area of the southern Rio Grande do Sul state, Brazil. This new species is characterized by antenna with accentuate setose sulcus from the peduncle to the distal article of the flagellum, outer endite of maxillula with slender seta among the outer group teeth and accessory tooth, one trifid tooth in the inner group, and male pleopod 1 endopod with distal part pointed and subapically not swollen.

The South America Scleropactidae includes 53 nominal species distributed in 14 genera. In Brazil, there are 16 species recorded in the north and southeast regions. Here, two new species of Scleropactidae are described based on material collected in caves in the state of Pará, both troglobitic and allocated in the genus Circoniscus. Circoniscus buckupi sp. nov. can be distinguished from its congeners by the long second article of antennal flagellum, inner endite of maxillula with a small hook-like spine at the apex, a long dactylar organ with pectinate apex conferring a knife-shaped appearance and the absence of schisma in adults. Circoniscus carajasensis sp. nov. can be distinguished from Circoniscus buckupi sp. nov. by the presence of schisma on pereionite 1 in adults and dactylar organ with a fringe appearance.