514


Journal of Paleontology 91(3):512–547


Figure 1. Map of Lago Bayano, Panama with collecting sites denoted by black circles. Numbers labelling each collecting site refer to the last three digits of the Smithsonian Tropical Research Institute (STRI) field number (Table 1).


Table 1. List of localities bearing chondrichthyan remains within Lago Bayano. GPS coordinates of STRI 300029 (Bayano 8) were improperly recorded and are not reported here; most likely this locality is within the cluster of islands that did bear chondrichthyan remains in southeastern Lago Bayano (Fig. 1). Specimens from Bayano 12 are all from a single locality, however sample labels and GPS coordinates were lost during transport and reported by FLMNH Site Key in the text. All GPS coordinates were taken using WGS84 datum. STRI locality (STRI Loc.) numbers can be searched in the STRI Geological Sample Database (http://biogeodb.stri. si.edu/jaramillo/fossildb). FLMNH = Florida Museum of Natural History and STRI = Smithsonian Tropical Research Institute.


STRI Loc. 290109


290113 290116 290125 290139 290144 290145 300029 300032 430011 430012


FLMNH Site Name Bayano 1


unknown


Bayano 2 Bayano 3 Bayano 4 Bayano 5 Bayano 6 Bayano 7 Bayano 8 Bayano 9 Bayano 10 Bayano 11 Bayano 12


FLMNH Site Key YPA066


YPA095 YPA096 YPA097 YPA098 YPA099 YPA100 YPA101 YPA102 YPA103 YPA104 YPA105


Chondrichthyan remains were collected from 12 localities within Lago Bayano, resulting in 1422 teeth and seven non-dental ele- ments. Surface collecting was done at all 12 localities and pro- duced 768 chondrichthyan teeth and two vertebral centra.Matrix was collected from five of the 12 localities and washed through a


Fig 1 ID 109


124–125 138–139 144 145 NA 032 011 012 NA


113 116


Latitude 9.1346


9.1436 9.1454 9.1432 9.1545 9.0942 9.154 -


9.1411 9.1413 9.1432 -


Longitude −78.7509


−78.756 −78.7582 −78.7549 −78.7836 −78.7981 −78.7853 -


−78.7545 −78.7546 −78.7549 -


set of screens with 6, 1.5, 1.0, and 0.5mmmesh, which produced 654 chondrichthyan teeth, two vertebral centra, two stingray caudal spines, and one stingray dermal denticle. To illustrate that we have accurately sampled both surface and screenwashed material, randomized species accumulation curves were created


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