The classification of foraminifers
in this study follows Loeblich and Tappan (1987, 1994), Saito et al.
The fossils commonly observed in this part are benthonic and planktonic foraminifers
of Mayaguez and Anasco Bays and its surroundings.
Microbiostratigraphical studies led to identify 54 genera and 86 species of fossils which most of them are foraminifers
, brachiopods, bivalves, sponge spicules, conularids and crinoids occur.
These finds are limited to long-ranging trace fossils, rare fragments of Platysolenites and agglutinated foraminifers
Luekatiella (Kala et al.
Also, there are rarely planktonic foraminifers
including non-keeled Globigerinids.
Groups distinctive for different ecosystems, especially indicating terrestrial, neritic and pelagic marine environments, are land plants, phytoplankton, foraminifers
, sponges, corals, arthropods, cephalopods, echinoderms, brachiopods, bryozoans, conodonts and fishes.
These new insights come from the chemical analysis of exceptionally well preserved fossils of marine micro-organisms called foraminifers
, discovered in marine rocks from New Zealand.
This biota, referred to as a Bryonoderm-extended assemblage, indicates much colder temperate conditions than those evidenced by the abundant algae and foraminifers
(Chloroforam assemblage) of the older Raanes Formation and Belcher Channel Formation.
A revision of mid-Cretaceous Textularian foraminifers
from Texas // J.
Since then, volume after volume has appeared, dealing with trace fossils, spores, conodonts, sponges, plants, graptolites, foraminifers
, brachiopods and, yes, more trilobites (according to some, too many, but never mind).