. Bulletin. Science; Natural history; Natural history. 48 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 4. Anterior views and suture of Anglonantilus catarinae n. sp. (A. B. C) and suture of An- glonautilus sp. (D). A) Paratype UCLA 58177. male; B) Paratype UCLA 5818 L female; C) Sutures of holotype UCLA 58184; D) Suture of UCLA 58430. A, B. and C. are from Santa Catarina Landing, Baja California (Maastrichtian). D is from the Santa Ana Mountains (Turonian). Bar = 1 cm. in Nautilus, is a sexually derived character (Sanders and Spinosa 1978). The aperture shape variation in A. catarinae may als
. Bulletin. Science; Natural history; Natural history. 48 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 4. Anterior views and suture of Anglonantilus catarinae n. sp. (A. B. C) and suture of An- glonautilus sp. (D). A) Paratype UCLA 58177. male; B) Paratype UCLA 5818 L female; C) Sutures of holotype UCLA 58184; D) Suture of UCLA 58430. A, B. and C. are from Santa Catarina Landing, Baja California (Maastrichtian). D is from the Santa Ana Mountains (Turonian). Bar = 1 cm. in Nautilus, is a sexually derived character (Sanders and Spinosa 1978). The aperture shape variation in A. catarinae may also be due to sexual dimorphism. Several authors have briefly commented on the presence of nautiloids from the Rosario Group in Baja California, Mexico. Burckhardt (1930) was the first pub- lished note on the occurrence of nautiloids. but neither he nor later authors figured any Baja California specimens. Burckhardt's specimens were not relocated for this study. Anderson and Hanna (1935) and later Anderson (1958:65) provided a brief discussion or mention of the nautiloids from Santa Catarina Landing (CAS loc. 1431). Anderson and Hanna (1935:25) referred to the nautiloids as Nautilus campbelli Meek and A^. cf d'orbignyamis Forbes; Anderson (1958:65) later re- ferred to them as Cymatoceras (?) campbelli (Meek). Inspection of the specimens from CAS loc. 1431 by the author shows that A. catarinae is present in the collection. Allison (1955:403) reported Eutrephoceras sp. from UCMP loc. A- 8580; upon inspection of this locality collection A. catarinae was also identified. Thus the various nautiloid taxon reported by these authors are probably assignable to A. catarinae based on the species present in the referred locality Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sc
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