Serratochaerilobuthus Lourenço, 2024

Serratochaerilobuthus Lourenço gen. n.

ZooBank:https://zoobank.org/ 78DB3880-C2C6-4CB6-8106-F4D478894696

Type species. – Serratochaerilobuthus schmidti Lourenço sp. n.

Diagnosis for the new genus. – General morphology is globally similar with that of the other elements of the family Chaerilobuthidae . A combination of characters can however be used to diagnose the new genus. A mediun to small global size compared to the other species of the family Chaerilobuthidae with a total length of 6.43 mm for a possible adult female.The specimen is somewhatbulk with metasoma and pedipalps short; relationship between chela length vs chela width equal to 3.68( Lourenço &Velten, 2022).The absence of median eyes with the possible presence of one or two pairs of lateral eyes and a trichobothrial pattern related to those of buthoids and chaeriloids, recalling typesA and B (Vachon,1974) defines the position of the new genus in the family Chaerilobuthidae , but other characters isolate it from the previously known genus of this family, Chaerilobuthus Lourenço & Beigel, 2011 :

( i) presence of a huge spinoid granulation over the metasomal carinae forming serrulas,

( ii) fixed and movable fingers of the pedipalps with 7-8 series of moderate to strong granules separated by marked spinoid accessory granules,

( iii) internal faces of femur and patella of pedipalps with huge apophysis,

( iv) tarsi of legs with very long and sharped ungues,

( v) possible presence of one extra trichobothrium on the ventral face of chela.

Diagnosis, complementary for the new species. – Carapace moderately emarginated anteriorly; median eyes absent; possible presence of one or two pairs of lateral eyes. Pedipalps moderately elongated; relationship between chela length vs chela width equal to 3.68 ( Lourenço & Velten, 2022); two spinoid apophysis present in the internal aspect of femur and patella. Pectines well observed, but extremely reduced with 5-5 teeth; fulcra absent; sternum approximately pentagonal and conspicuous, slightly wider than long; genital operculum with two very flattened oval plates; spiracles small and slightly rounded in shape. Chelicerae not observed; possibly retracted under the carapace. Telson with a largely bulbous vesicle with a thin and long aculeus. Trichobothrial pattern similar to the one observed for the genus Chaerilobuthus , but one possible extra trichobothrium on the ventral aspect of chela; can be observed at least 2 dorsal and 4 external trichobothria on the femur; 2-3 dorsal, 1 internal and 4-5 external on the patella; 2 dorsal, 3-4 external and 2-3 ventral on chela hand and 4-5 on fixed finger.