By Christian Klug, Dieter Korn, Kenneth De Baets, Isabelle Kruta, Royal H. Mapes
This two-volume paintings is a testomony to the abiding curiosity and human fascination with ammonites. we provide a brand new version to give an explanation for the morphogenesis of septa and the shell, we discover their habitats by means of the content material of sturdy isotopes of their shells, we talk about the starting place and later evolution of this crucial clade, and we convey hypotheses on its loss of life. The Ammonoidea produced a good number of species that may be utilized in biostratigraphy and probably, this is often the macrofossil workforce, which has been used the main for that goal. however, many features in their anatomy, mode of existence, improvement or paleobiogeographic distribution are nonetheless poorly recognized.
Themes taken care of are biostratigraphy, paleoecology, paleoenvironment, paleobiogeography, evolution, phylogeny, and ontogeny. Advances corresponding to an explosion of latest information regarding ammonites, new applied sciences reminiscent of isotopic research, tomography and digital paleontology regularly, in addition to non-stop discovery of latest fossil unearths have given us the chance to provide a complete and well timed "state of the paintings" compilation. furthermore, it additionally issues the best way for destiny experiences to extra improve our realizing of this forever attention-grabbing crew of organisms.
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Additional info for Ammonoid Paleobiology: From macroevolution to paleogeography
N Ptychites (Anisian; after Monnet et al. 14 g, i). o Drepanites rutherfordi (Norian; after Tozer 1994, pl. 5). p Proharpoceras carinatitabulatum (Smithian; after Brayard et al. 3w, x). q Ussurites arthaberi (Anisian; after Monnet and Bucher 2005, pl. 11). r Proarcestes bramantei (Anisian; after Monnet and Bucher 2005, pl. 7). s Stikinoceras kerri (Norian; after McLearn 1960, pl. 3 Fig. 2; × 2). t Tropites crassicostatus (Carnian; after Jenks et al. 2015, pl. 9e, f). All specimens are at the same scale (scale bar = 2 cm) unless stated otherwise 36 C.
Irrespective of the phylogenetic relationships, the question for the main apomorphies of ammonoids arises. , House 1988). , Kröger 2005). The systematic positions and levels of Bactritida, Coleoidea and Ammonoidea need to be critically revised. The phylogenetic position of some curved bactritoids like Pseudobactrites (Kröger and Mapes 2007; showing also some similarities to Cyrtobactrites, which might indicate closer affinity or convergence) as well as Kokenia (Turek and Marek 1986) are still debated (compare Erben 1966; Turek and Marek 1986; Kröger and Mapes 2007; De Baets et al.
Geol Soc London Spec Pub 102:163–185 Jacobs DK, Landman NH (1993) Nautilus—a poor model for the function and behavior of ammonoids? Lethaia 26:101–111 Keupp H (2000) Ammoniten. Paläobiologische Erfolgsspiralen. Thorbecke, Sigmaringen Klug C (2001a) Life-cycles of Emsian and Eifelian ammonoids (Devonian). Lethaia 34:215–233 Klug C (2001b) Early Emsian ammonoids from the eastern Anti-Atlas (Morocco) and their succession. Paläontol Z 74:479–515 Klug C (2007) Sublethal injuries in Early Devonian cephalopod shells from Morocco.