On the symphytognathoid spider genus Mysmenopsis Simon, 1898 (Araneae: Mysmenidae) from the Brazilian Amazonian region: description of five new species and new records.

Five new species of Mysmenopsis from the Brazilian Amazonian region are described: M. rodriguesae n. sp. and M. nadineae n. sp. known by males and females, M snethlageae n. sp., M. lopardoae n. sp. and M. regiae n. sp. known only by males. Three species, M. cienaga Müller, 1987 (previously known from Peru and Colombia), M. penai Platnick & Shadab, 1978 (Ecuador and Colombia), and M. shushufindi Dupérré & Tapia, 2020 (Ecuador) are recorded for the first time in Brazilian Amazonian region. An additional record of M. penai from northeastern Brazil is included.

Taxonomic review of the New World spider genus Elaver O. Pickard-Cambridge, 1898 (Araneae, Clubionidae).

Elaver O. Pickard-Cambridge, 1898 is characterized and redescribed, including 49 species occurring from the United States to Argentina. Thirty seven previously known species are redescribed: Elaver achuca (Roddy, 1966) revalidated, E. balboae (Chickering, 1937), E. barroana (Chickering, 1937), E. calcarata (Kraus, 1955), E. carlota (Bryant, 1940), E. chisosa (Roddy, 1966), E. crinophora (Franganillo, 1934), E. crocota (O. Pickard-Cambridge, 1896), E. albicans (Franganillo, 1930) name restored, E. depuncta O. Pickard-Cambridge, 1898, E. elaver (Bryant, 1940), E. excepta (L. Koch, 1866), E. grandivulva (Mello-Leitão, 1930), E. hortoni (Chickering, 1937), E. implicata (Gertsch, 1941), E. juana (Bryant, 1940), E. kohlsi (Gertsch & Jellison, 1939), E. linguata (F.O. Pickard-Cambridge, 1900), E. madera (Roddy, 1966), E. mirabilis (O. Pickard-Cambridge, 1896) new. comb., E. mulaiki (Gertsch, 1935), E. multinotata (Chickering, 1937), E. orvillei (Chickering, 1937), E. placida O. Pickard-Cambridge, 1898, E. portoricensis (Petrunkevitch, 1930), E. quadrata (Kraus, 1955), E. richardi (Gertsch, 1941), E. sericea O. Pickard-Cambridge, 1898, E. sigillata (Petrunkevitch, 1925), E. simplex (O. Pickard-Cambridge, 1896), E. texana (Gertsch, 1933), E. tigrina O. Pickard-Cambridge, 1898 name restored, E. tricuspis (F.O. Pickard-Cambridge, 1900), E. tristani (Banks, 1909), E. tumivulva (Banks, 1909), E. valvula (F.O. Pickard-Cambridge, 1900) and E. wheeleri (Roewer, 1933). Ten new species are described: E. candelaria n. sp. and E. helenae n. sp. from Mexico; E. arawakan n. sp. from Haiti; E. lizae n. sp. from Costa Rica; E. darwichi n. sp. from Ecuador; E. juruti n. sp., E. tourinhoae n. sp. and E. vieirae n. sp. from Brazil; E. shinguito n. sp. from Peru and E. beni n. sp. from Bolivia. The female of E. hortoni is described for the first time. Lectotypes are designated for E. sigillata and its actual female is described for the first time. Four new synonyms are proposed: E. languida (Gertsch, 1941) is synonimized with E. multinotata; E. dorothea (Gertsch, 1935) with E. wheeleri; E. exempta (Gertsch & Davis, 1940) with E. placida and E. vulnerata (Kraus, 1955) with E. calcarata. The drawings in the original descriptions of E. kawitpaaia (Barrion & Litsinger, 1995) and E. turongdaliriana (Barrion & Litsinger, 1995) are sufficiently informative to exclude these species from Elaver but not to accurately establish its generic affiliation. Thus, until the types become available for examination, these species must remain as Clubionidae incertae sedis. Heterochemmis (F.O. Pickard-Cambridge, 1900) is synonymized with Elaver and Heterochemmis mutatus Gertsch & Davis,1940 is recognized as a junior synonym of Elaver mirabilis n. comb., the type species of Heterochemmis. New records are presented for E. valvula, E. balboae, E. brevipes (Keyserling, 1891), E. grandivulva and E. lutescens (Schmidt, 1971). Two species described by Franganillo, E. tenera (Franganillo, 1935) and E. tenuis (Franganillo, 1935), are considered species inquirendae.

Bumba, a replacement name for Maraca Pérez-Miles, 2005 and Bumbalennoni, a new tarantula species from western Amazonia (Araneae, Theraphosidae, Theraphosinae).

We propose the name Bumba as a new name for Maraca, preoccupied by Maraca Hebard, 1926 (Orthoptera). We describe and illustrate Bumbalennoni, a new theraphosid species from Caxiuanã, Pará, Brazil. This species differs from the other species of the genus in the extremely reduced keel on male palpal organ and in the higher number of labial and maxillary cuspules. Females additionally differ in the spermathecal morphology. As a consequence of the name replacement, three new combinations are established.

Abundância e fenologia de Cryptocellus simonis Hansen & S°rensen, 1904 (Ricinulei, Arachnida) na serapilheira do bosque Rodrigues Alves, Belém, Pará, Brasil, com a comparação de três técnicas de coleta / x

Estudou-se a abundância e a fenologia de uma população de Cryptocellus simonis, no Bosque Rodrigues Alves, região metropolitana de Belém. Foram coletadas 159 amostras de 1 m² de serapilheira concentrada, 53 processadas manualmente, 53 em funis de Berlese-Tullgren e 53 com extratores de Winkler. Obteve-se um total de 111 indivíduos, sendo 11 machos, 15 fêmeas, 61 ninfas e 24 larvas. As densidades média e máxima foram 0,7 e 18 ind./m², respectivamente. No período chuvoso (março a maio), os jovens representaram 78 por cento do total de indivíduos (oito larvas, 16 protoninfas, sete deutoninfas, oito tritoninfas e 11 adultos). No período seco (setembro a novembro), os jovens corresponderam a 75 por cento (16 larvas, nove protoninfas, 11 deutoninfas, 10 tritoninfas e 15 adultos). Não foram encontradas diferenças significativas na abundância de C. simonis entre os períodos seco e chuvoso, porém foi encontrada correlação positiva e significativa entre o comprimento da carapaça e o comprimento do fêmur III, em cada estágio de desenvolvimento. O extrator de Winkler representou 63 por cento do total de indivíduos e foi a melhor técnica na captura de Ricinulei.

The abundance and phenology of a population of Cryptocellus simonis from Rodrigues Alves Park, Belém, Pará State, Brazil was studied. A total of 159 concentrated litter samples (each one with 1 m²) were obtained, 53 manually sorted, 53 processed in a Berlese-Tullgren apparatus and 53 processed in a Winkler apparatus. These three techniques produced 111 individuals (11 males, 15 females, 61 nymphs and 24 larvae). The median and highest densities were 0.7 and 18 ind./m², respectively. During the rainy season (March to May) the juveniles represented 78 percent of all collected individuals (eight larvae, 16 protonymphs, seven deutonymphs, eight tritonymphs and 11 adults), while during the dry season (September to November) the juveniles represented 75 percent of the total catch (16 larvae, nine protonymphs, 11 deutonymphs, 10 tritonymphs and 15 adults). No significant differences in the abundance of C. simonis were detected comparing the rainy and dry seasons. The development stages showed a significant positive correlation between the carapace and femur III lengths. Winkler bags represented 63 percent of all catches and were the best collecting technique for ricinuleid sampling.