Description of the male of the spider Eustala vellardi Mello-Leitão, 1924, the female of E. delasmata Bryant, 1945 and seven species of Eustala Simon, 1895 declared as nomina dubia (Araneae, Araneidae) Author Poeta, Maria Rita M. Author Teixeira, Renato Augusto text Zootaxa 2017 4273 1 112 120 journal article 28699 10.11646/zootaxa.4273.1.8 70488f4e-090b-4d3b-89d9-388bf5513818 1175-5326 818341 A7518368-81D0-4E0B-A194-54235BA0188C Eustala essequibensis ( Hingston, 1932 ) Epeira essequibensis Hingston, 1932 : 366 . Male holotype from Essequibo River , British Guiana ( BMNH , presumably lost, not examined). Singa essequibensis Mello-Leitão, 1948 : 171 Wixia essequibensis Levi, 1991 : 179 Eustala essequibensis Levi, 1995 : 209 . WSC 2017. Note. Levi (1991 , 1995 ) pointed to the challenges in recognizing this species without the specimens and proper diagnosis, descriptions, and figures. Type material not found in BMNH. Thus, we consider it as a nomen dubium .