. Bulletins of American paleontology. Teleostean Fishes: Aguilera and Aguilera 263 Dorsal Margin. Dorsal Depression Antirostrum Excisura Rostrum Ostium Crista Superior Posterior Margin Cauda Crista liiferior Ventral Depression 1 mm Ventral Margin Plate 1 Principal morphological features of the mesial surface of a right otolith (Epigoinis deniiculatus. Dieuzeide. 19?0). PPP 5057. from the Early Pliocene Cubagua Formation, Venezuela. for otoliths to accumulate at shallower depths (Elder et 1996). These problems raise questions about how well the occurrence of otoliths in sediments reflects
. Bulletins of American paleontology. Teleostean Fishes: Aguilera and Aguilera 263 Dorsal Margin. Dorsal Depression Antirostrum Excisura Rostrum Ostium Crista Superior Posterior Margin Cauda Crista liiferior Ventral Depression 1 mm Ventral Margin Plate 1 Principal morphological features of the mesial surface of a right otolith (Epigoinis deniiculatus. Dieuzeide. 19?0). PPP 5057. from the Early Pliocene Cubagua Formation, Venezuela. for otoliths to accumulate at shallower depths (Elder et 1996). These problems raise questions about how well the occurrence of otoliths in sediments reflects their dis- tributions in life. To begin to address this question, we examined otoliths from nine sediment samples ob- tained by dredging in depths of 41-102 m in the Gulfs of Panama and Chiriqui along the Pacific coast of Pan- ama (Text-fig. 1). All of the genera obtained have rep- resentatives among the fossils collected from the Li- mon, Bocas del Toro, and Panama Canal basins. Oto- liths were identified based on examination of speci- mens of living species from the area. Data on depth of occurrence and life habits of living fishes (Allen and Robertson, 1994) were compared to the depth of collection and bottom conditions at the sites of collec- tion of the dredge samples (H. Fortunato, oral com- munication, 1998). Estimates of Paleobathymetry We used all the samples from the same formation to make one estimate of paleobathymetry, using the method of Nolf and Brzobohaty (1992). The method is based on the assumption that the taxa encountered Middle to Late Miocene Gatun Formation (Panama Canal Basin, Panama) 1 3 = g § S & fj -c y fT ai ^ > 3 9- C C W ^->^-: a ? a. ^ o c ^ Q. -c — o O -c 5> ^ -c 9- f^ ^ fr .S S is S- § j g- g 5 g g "° "° f ESS 200 300 400 500 \' -T—r V V 94% Text-tigure 2.—Present-day bathymetric ranges of taxa represented in the Gatun Formation. Solid and dashed lines drawn as in Text-figure Please note that these image
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