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

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

Trigonithyris has well-developed horizontal hinge plates and very long adductor muscle scars in contrast to the reduced hinge plates and short muscle scars of Seeurithyris. Pygopidae is an other group of genera having many features common with Seeurithyris: the type species S. adnethensis (and its more frequently cited junior objective synonym S. erbaensis) was regarded by many authors (from SUESS 1852 to RENZ 1932) as an imperforate pygopid. The internal similarity is even more convincing (cf. Fig. 6 herein and text-figs 3, 4 in DIENI & MIDDLEMISS 1981). No doubt that Seeurithyris belongs to the Pygopidae. Fig. 6. Seeurithyris adnethensis (SUESS). A series of fourteen transverse sections through the posterior part of a specimen from Kericser (Bakony, Hungary), Ibex Zone. Hung. Geol. Inst., J. 9190. Original length of specimen 38.0 mm. The brachidium persisted to 11.5 mm from the posterior end of the shell