Smithsonian miscellaneous collections . Floscelle.—Phyllodes well developed, broad (text fig. 50), approxi-mately 34-37 pores in each phyllode, 11 or 12 in each outer series,5-7 irregularly arranged in each inner series; approximately samenumber in smallest specimen preserving phyllode (40 mm long) asin largest (90 mm long). Buccal pores present. Bourrelets veryprominent, pointed. Tuberculation.—Tubercles adorally much larger than adapically,naked granular zone in median area of interambulacrum V andambulacrum III adorally. Comparison with other species.—This species is distinguished fromR. ay
Smithsonian miscellaneous collections . Floscelle.—Phyllodes well developed, broad (text fig. 50), approxi-mately 34-37 pores in each phyllode, 11 or 12 in each outer series,5-7 irregularly arranged in each inner series; approximately samenumber in smallest specimen preserving phyllode (40 mm long) asin largest (90 mm long). Buccal pores present. Bourrelets veryprominent, pointed. Tuberculation.—Tubercles adorally much larger than adapically,naked granular zone in median area of interambulacrum V andambulacrum III adorally. Comparison with other species.—This species is distinguished fromR. ayresi Kier by its more pointed adapical surface, more gentlysloping sides, and more angular marginal outline. Its adoral surface no. 5 TERTIARY ECHINOIDS FROM FLORIDA—KIER 51 H rro Mw _i ti60 tn £&0 cro g40 -30 ^£0 o ccIO 10 20 30 40 50 60 70 80 LENGTH IN MILLIMETERS 90 100 Fig. 49.—Rhyncholampas evergladcnsis (Mansfield). Number of pore-pairsin posterior zones of petals II or IV relative to length of test. * •.••.. • • • • • * *...»% Fig. 50.—Rhyncholampas evergladensis (Mansfield) : Floscelle of , from the Tamiami formation, loc. 9, X 5. 52 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I45 is more depressed, the naked zone in interambulacrum 5 is wider(text fig. 42), and phyllode III is wider. R. evergladensis is similar in many of its characters to R. pacificus(A. Agassiz), a species living off the west coast of the UnitedStates, but is distinguished by its wider petals and more steeply slop-ing posterior margin. R. evergladensis is distinguished from Rhyncholampas sabistonen-sis (Kellum) by its higher and narrower test. Cooke (1959, p. 57)considered the two species synonyms. Occurrence.—Tamiami formation (typical), loc. 9, 11, 13, 15, 16,18, 19. Tamiami formation (barnacle-echinoid-oyster facies), loc. 26, 27. Types.—Lectotype, herein designated, 37329 (Mans-field, 1932, pi. 18, figs. 1-3), 11177; figured specim
Size: 1759px × 1421px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
