. Bulletins of American paleontology. 400 10 20 30 40 50 120 Number of specimens. 0 Brackish Very shallow marine (<30m) Marine (30m to <100m) 30 40 50 Number of specimens Text-figure 5.—Stratigraphic distributions of NMB samples of N. fifiulopicia and .S'. ririclis. and the number of specimens in each sam- ple, from the Rio Gurabo section. (Al. N. figulopicta. (B). S. Samples represent a collection of specimens from a stratigraphically defined position (see the APPENDIX and Saunders ei 1986, pp. 41-64). suggests that the Rio Mao bluffs should be assigned to the upper Cerc
. Bulletins of American paleontology. 400 10 20 30 40 50 120 Number of specimens. 0 Brackish Very shallow marine (<30m) Marine (30m to <100m) 30 40 50 Number of specimens Text-figure 5.—Stratigraphic distributions of NMB samples of N. fifiulopicia and .S'. ririclis. and the number of specimens in each sam- ple, from the Rio Gurabo section. (Al. N. figulopicta. (B). S. Samples represent a collection of specimens from a stratigraphically defined position (see the APPENDIX and Saunders ei 1986, pp. 41-64). suggests that the Rio Mao bluffs should be assigned to the upper Cercado or lower Gurabo Formations (Saunders et al., 1986). Samples from the Rio Mao section contain Nehtina figulopicta and Smaragdia viridis. The latter is very abundant and occurs in 17 NMB samples. It is most abundant in TU 1294 (279 specimens). In contrast, N. figulopicta is rare (three specimens) and occurs in three NMB samples. Rio Yaque del Norte (see Text-fig. 6).—The Lopez samples from the Baitoa Formation contain the oldest nertids from the Cibao Valley. The data presented here include the stratigraphic positions of NMB samples above Horizon A, a discordant erosive contact below poorly sorted conglomerates (see Saunders et al., 1986). Both Nehtina figulopicta and Smaragdia viridis occur in the Baitoa Formation. Smaragdia is abundant (113 specimens) and occurs in 10 NMB sam- ples. It first appears in NMB 17286 at approximately 22 m in the section and last appears in NMB 16942 at approximately 50 m in the section. Smaragdia vir- idis is most abundant from 20 m to 35 m in the section. Neritiiia figulopicta is rare (three specimens) and oc- curs in three NMB samples. It first occurs in NMB 17283 from approximately 13 m in the section and last occurs at NMB 17287 from approximately 49 m in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these il
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