Emig, Christian C, and José A Vargas. 1990. “<i>Glottidia audebarti</i≫ (Broderip), (Brachiopoda, Lingulidae) from the Gulf of Nicoya, Costa Rica”. Revista De Biología Tropical 38 (2A):251–258. https://revistas.ucr.ac.cr/index.php/rbt/article/view/25056.