Scorpions (Arachnida, Scorpiones) from the state of Acre, southwestern Brazilian Amazon

Abstract

Although Brazil has one of the highest scorpion diversities worldwide, the scorpion fauna of the Amazon region remains relatively poorly described. In this study, we updated the list of scorpion species from the state of Acre, in the southwestern Brazilian Amazon, based on a revision of records contained in Brazilian arachnid collections and a survey of the relevant literature. We recorded the occurrence of seven scorpion species belonging to two families (Buthidae and Chactidae) among which we report three new records (Ananteris sp., Tityus (Tityus) gasci, and Chactopsis cf. insignis) for Acre. The results presented herein make an important contribution to the knowledge on scorpion diversity in the Amazonian forests of Acre.

Scorpion species of medical importance in the Brazilian Amazon: a review to identify knowledge gaps

“… Species Morphology Body size (mm) Habitat Micro-habitat Brood size Ref. Brotheas amazonicus (Chactidae), Lourenço, 1988 General coloration dark brown and reddish telson. Carapace moderately granular; tergites I to IV punctuate; VII moderately granular.…”

“… 75-100 Terra firme forest and floodable forest ( igapó and várzea ) Specimens are found in leaf litter, in the trunk of Arecaceae, on Amazonian canopy or near rural settlements. 15-25 [ 15 , 69 , 71 , 79 ] T. ( Atreus ) tucurui Lourenço, 1988 Coloration blackish-brown dentate margins of pedipalp-chela fingers with 16 oblique rows of granules; pectines with 20 to 21 teeth. 85-100 Terra firme forest These arthropods hide in the vegetation or in the palm leaf sheaths.…”

“… 55-60 Terra firme. - - [ 76 ] T. ( Tityus ) raquelae Lourenço, 1988 Coloration yellowish without spots; pedipalp-chela fingers composed of 15 oblique rows of denticles; pectines with 17 to 18 teeth. 55-60 Terra firme forest.…”

“… Acre : Mâncio Lima, Rio Branco, Sena Madureira, Senador Guiomard. Pará (no municipality specified) [ 74 , 106 ] T. generaltheophiloi Roraima : Parque Nacional da Serra da Mocidade [ 24 ] T. grahami Amazonas : Santa Isabel do Rio Negro, Barcelos. [ 26 , 95 ] T. lokiae Amazonas : Tarumã Mirim, Manaus.…”

Scorpions (Arachnida: Scorpiones) from the Serra de Piquiatuba, Santarém, Pará, northern Brazil

“…The heterogeneity in the knowledge regarding Brazilian scorpions is also evident among biomes. The Amazon contains the highest number of recorded scorpion species among Brazilian biomes, and about half of the scorpions of Brazil are known from this region (Lira et al 2021). The states of Amazonas and Pará exhibit the highest species richness in northern Brazil, with 40 and 20 recorded scorpion species, respectively (Lira et al 2021), though this is to be expected because these states are large in area ( c .…”