Chaerilobuthus gigantosternum Lourenço, 2016

Chaerilobuthus gigantosternum Lourenço, 2016 (Family Chaerilobuthidae )

A very small specimen, with a total length of 2.59 mm; sex could not be defined ( Fig. 12). Included in a very clear yellow piece of amber sizing 28 x 19 x 4 mm. The piece contains vegetal debris and some dirt, but also some insects, Diptera . The species is clearly characterised by morphological structures similar to that of the holotype of C. gigantosternum with pedipalps moderately short and bulk; the ratio between chela length/width is 4.69, while the one presented by the holotype of C. gigantosternum is close to 4.00 ( Lourenço, 2016). Both specimens show an important sternum and pectines have 6-5 teeth in the new specimen vs 5-5 for the female holotype of C. gigantosternum . For more details on this species refer to Lourenço (2016).

1. Ventral aspect showing sternum, genital operculum, pectines and sternite I with spiracles. 2. Metasomal segments I to V and telson, lateral aspect, showing serrulas and strong spination. 3. Right pedipalp, dorsal aspect showing trichobothrial pattern. 4. Left pedipalp, ventro-lateral aspect, showing trichobothria and dentation on chela fingers.