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One specimen of the brachyuran (Etyoidea: Feldmanniidae) Caloxanthus americanus from the Cenomanian Grayson Formation in Texas (U.S.A.) is here reported. The specimen includes morphological details not previously described for this species. In particular, the preservation of the eye structure is remarkable and it represents one of the few records of composite eye preservation in fossil brachyurans.Keywords: Caloxanthus, Cenomanian, composite eye, Crustacea, Exceptional preservation, eye, Grayson formation, Waco, Texas. Resumen Se reporta un ejemplar del braquiuro (Etyoidea: Feldmanniidae) Caloxanthus americanus del Cenomaniano de la Formación Grayson en Texas, E.U.A. El ejemplar incluye detalles morfológicos no descritos previamente para esta especie. En particular, la preservación de la estructura del ojo es notable y representa uno de los pocos registros de preservación de ojos compuestos en braquiuros fósiles.

In the present paper we report on several new occurrences of decapod Portunus monspeliensis A. Milne Edwards, 1860 from Miocene beds of eastern Slovenia, i. e. from the already known locality Šentilj in the northeastern Štajerska region and additional new localities in the Kozjansko and Dolenjska regions. These new reported occurrences of P. monspeliensis from the Middle Miocene (Badenian) strata of eastern Slovenia improve our knowledge of this otherwise widespread decapod crustacean. Additionally, we also re-evaluate the environmental preferences of the species and its wider palaeobiogeographical distribution during the Miocene in the Mediterranean, Atlantic and Paratethys Seas. Izvle~ekV pričujočem članku poročamo o novih primerkih rakovic vrste Portunus monspeliensis A. Milne Edwards, 1860 iz miocenskih plasti v vzhodni Sloveniji, in sicer iz že znanega najdišča pri Šentilju v severovzhodnem delu Štajerske in iz novih nahajališč iz območja Kozjanskega in Dolenjske. Nove najdbe iz miocenskih plasti vzhodne Slovenije dopolnjujejo naše poznavanje vrste P. monspeliensis. Med drugim v članku na novo opredeljujemo okoljske preference te vrste in njeno širšo paleobiogeografsko razširjenost v obdobju miocena na območju Sredozemskega morja, Atlantskega oceana in Paratetide. GEOLOGIJA 59/1, 55-66, Ljubljana 2016 http://dx

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