... as Shallow Benthic Zone 23, late Chattian, includes: Austrotrillina asmariensis , Nephrolepidina spp., Eulepidina dilatata , E. elephantina , E. raulini , Amphistegina bohdanowiczi , A. mammilla , Operculina complanata , Nummulites cf. vascus , N. aff . kecskemetii , Heterostegina assilinoides , Spiroclypeus...

...C. P. Gravenor; R. K. Leavitt Abstract The patterns found on the surfaces of etched detrilal garnets are formed by facets that resemble a series of elongated overlapping sharp-edged rectangular or rhombohedral building blocks, mammilla, or rounded hummocks that are gradational to facets...

... that Paraelongatoolithus no longer belongs to Elongatoolithidae based on a combination of reticulated ornamentation, columnar continuous layer, and acicular mammillae. The high structural variation in elongatoolithid eggshells also implies that it may be inappropriate to relate all previous elongatoolithid eggshells...

... naticid ( Cryptonatica janthostomoides , Lunatia pila , and Mammilla sp.) and one muricid ( Ocenebra inornata ) species. The muricid predator was rarer (relative abundance within each horizon <0.31%) than the naticid predators. The cosmopolitan naticid...

...” of the crystals in the upper mammillae that extend into the overlying continuous layer. Microstructural features of the two nearly complete eggs suggest that the specimens are referable to a potentially large theropod dinosaur. Paleogeographic distribution of these large theropod eggs includes the Late Cretaceous...

..., such as Hegleria mammilla ( Sheng and Wang, 1985 ); Ishigaum trifustis De Wever and Caridroit, 1984 ; Foremanhelena triangula De Wever and Caridroit, 1984 ; Triplanospongos dekkaensis ( Noble and Renne, 1990 ); Nazarovella gracilis De Wever and Caridroit, 1984 ; and Nazarovella inflata Sashida and Tonishi, 1986...

..., Lenticulina and Bullopora?, and a new species Mammilla hemispherica is erected for the problematical organism. High values of faunal diversity and calcareous benthic/agglutinated ratio are treated as indicating relatively deep neritic water, whereas low values indicate shallow neritic water. On this basis...

... is smooth but at places some fine sculpturing. is noticeable, The pores are visible to naked eye and are subrounded to elliptical. The distribution of the pores is random and has a density of about 10 pores. per sq. em in some of the egg shells. The internal surface shows aggregate of very fine mammillae...

...Figure 1. Scanning electron micrographs of glaucous-winged gull eggshell, with notable features indicated. All bars 20 µm. A) Outer surface and B) inner surface of fresh eggshell; note the lack of pinholes and shallow erosion pits on the outer surface, and the well-defined margins of mammillae...

... shell; T, third medullary shell; IS, inner spicule). figs 14–16. Hegleria mammilla (Sheng & Wang): 14 , DP3/4819; 15 , DP4/3429; 16 , DP3/4744. Scale bar is 10 µm in figs 12, 18, 19; 20 µm in fig. 17; 50 µm in figs 1, 3, 4, 6–11, 13–16, 20; 100 µm in figs 2, 5. Genus Trilonche Hinde...

... (Fig. II, 1) are visible. Pores are subcircular to elliptical in shape. The distribution of pores is not uniform. Maximum density of 80 pores per sq em in some eggshell fragments were noticed (Fig: II, 1 The internal surface of the eggshell shows very fine granular mass. consisting of mammillae...

... mammilla to be unevenly distributed, with extensive development on the left, and few mammilla present on the right. F ig . 1. Mammillated surface on olivine. F ig . 2. Heterogeneous distribution of mammillated surfaces on olivine. Anhedral, conical or funnel-shaped etch pits occur...

... and shallow channels. (C) Inner surface of eggshell with distinctly cratered mammillae. (D–F) Eggshell after 1 year of weathering on surface of nesting colony. (D) Radial view, showing little alteration. (E) Outer surface, corroded with loss of channels and more shallow depression surrounding pore. (F) Inner...

... fragments have been weathered, which means that the bases of mammillary units cannot be discerned. The possible exceptions are UALVP 57622-A and UALVP 57622-F ( Fig. 3B ), where there are internal iron-stained layers that may represent mammillae. Fig. 2. Histogram of eggshell fragment thickness...

... E). Canaliculae are long, narrow and subvertical (Plate I D and Fig. 1A). The mammillary zone is generally conical. The mammillae as seen in tangential sections are subcircular and found coalescing at places. The pores are subcircuJar to elliptical in shape. Uniaxial figure is also feebly seen...