A short description is given by Weirather (Giachino & Lana 2005, Pretner 2011). It is a 12 m deep shaft at Malimadi Mt (1,500m a.s.l.). Weirather named the cave after his guide Petro Kostan from Krystalopigi.
Fauna
Duvalius boschi Jeannel, 1929, Jeannel 1929, Wolf 1937b, Wolf 1938, Casale et al. 1993, Giachino & Lana 2005, Pretner 2011, Beron 2016 Phylum: Arthropoda / Class: Insecta / Order: Coleoptera / Family: Carabidae
Beron, P. 2016. Faune cavernicole de la Grèce. Maison d'édition Est-West., Sofia. pp. 229.
Casale, A., Giachino, P. M., Vailati, D. & Rampini, M. 1993. Il genere Duvalius in Grecia: stato attuale delle conoscenze, interesse biogeografico e descrizione di una nuova specie (Coleoptera, Carabidae, Trechinae). Boll. Mus. civ. St. nat. Verona, 20 (1): 303-335.
Giachino, P. M. & Lana, E. 2005. Diaries of a biospeleologist at the beginning of the XX century. Fragm. Entomol., 37 (2): 1-264.
Jeannel, R. 1929. Le sillon transegéen et description de Coléoptères cavernicoles nouveaux de la Grèce. Bull. Soc. Sci. Cluj, 2 (4): 59-84.
Pretner, E. 2011. Die Verdienste von Leo Weirather um die Biospeläologie, insbesondere Jugoslawiens, sein Höhlenkataster und seine Sammelplätze. Ber. nat.-med. Ver. Innsbruck, 97: 85-234.
Wolf, B. 1937. Animalium Cavernarum Catalogus. II. - Cavernarum Catalogus. Junk Verl., Wien (1934-1937). pp. 616.
Wolf, B. 1938. Animalium Cavernarum Catalogus. III. - Animalium Catalogus. Junk Verl., Wien (1934-1938). pp. 918.
Citation
Paragamian, K. 2026. Fauna of the cave
Spilaio Petra, Krystalopigi, Prespes, Dytiki Makedonia. In Paragamian, K., M. Poulinakis, S. Paragamian and I. Nikoloudakis.
Cave fauna of Greece database - Hellenic Institute of Speleological Research.
Cave data updated 04.04.2018,
Accessed 19.04.2026