Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 75. (Budapest 1983)

Vörös, A.: Some new genera of Brachiopoda from the Mediterranean Jurassic

Fig. 19. Securina securiformis (GEMMELLARO). A series of fourteen transverse sections through a specimen from Úrkút (Bakony, Hungary). Sinemurian. Hung. Nat. Hist. Mus.. M. 65. 214/A. Original length of specimen 15.7 mm. The brachidium persisted to 13.8 mm from the posterior end of the shell