Until dirt do us apart: on the unremarkable palp morphology of the spider Sternospina concretipalpis Schmidt & Krause, 1993, with comments on the genus Prionolaema Simon, 1894 (Araneae, Tetragnathidae) - Dimitrov, Di.; Álvarez-Padilla, F.; Hormiga, G. (Zootaxa, 2008)