Ziegler Catalogue of Conodonts

The usefulness of conodonts in biostratigraphy, from the Cambrian to the Triassic and the increasing flow of taxonomic descriptions made it both necessary and justifiable to compile the significant set of data on genera and species in a catalogue. It fills a gap in the literature.

No attempt has been made to select a special order of taxa to be included in the volumes to come but the volumes will contain all significant conodont taxa.

In Volume I, published in 1974, the following genera from Upper Cambrian, Ordovician, Upper Silurian, Devonian, and Permo-Triassic have been partly or wholly treated: Acodus, Acontiodus, Anchignathodus, Ancyrodella,, Ancyrognathus, Ancyrolepis, Clavobamulus, Drepanodus, Drepanoi stodus, Fryxellodontus, Gladigondolella, Gondolella, Hirsutodontus, Neogondolella, Neospathodus, Oistodus, Oneotodus, Ozarkodina, Palmatolepis, Pandorinellina,, Paroistodus, Polygnathus, Proconodontus, Protognatbodus, Schmidtognatbus, Semiacontiodus, Siphonodella, Xaniognathus.

Volume II extends the work begun in volume I. Descriptions of some genera started in volume I have been completed (Siphonodella) or continued (Acodus, Neogondolella, Palmatolepis, Polygnathus). Several genera and descriptions of all of their presently recognized species have been newly included (Bispathodus, Idiognathodus, Neognathodus, Neopanderodus, Declinognathodus, Pelekysgnathus, Streptognatbodus, Platyvillosus, Pseudofurnishius). The genus Icriodus and most of its species, except for a few Lower Devonian and one Upper Devonian species, have been described. In addition, few generic descriptions have been included for use in comparison (Stolodus, Protoprioniodus, Protopanderodus).

Volume III continues specific descriptions of genera begun in earlier volumes (Acodus, Baltoniodus, Oepikodus, Ozarkodinay Palmatolepisy Pandorinellinay Polygnathus, Prioniodus, Stolodus). Newly included genera are: Amorphognathus, Aulacognathus, Diplognathodus, Eognathodus, Eoplacognathus, Epigondolella, Hindeodus, Isarcicella, Neostreptognathodus, Paltodus, Pterospathodus, Rhodesognathus, Sweetognathus.

In Volume IV descriptions of of the following are continued and/or completed (Ancyrognathus Drepanodus, Paltodus, Paroistodus, Polygnathus, Protognatbodus, Protopanderodus). Newly introduced genera are Aphelognathus, Belodina, Doliognathus, Eotaphrus, Gnathodus, Kockelella, Oulodus, Paracordylodus, Periodon, Phragmodus, Plectodina, Pseudohelodina, Pseudopolygnathus, Scaliognathus.

Volume V covers species of the following genera: Ancyrodelloides, Chirognathus, Chahabagnathusy Icriodus, Klapperina, Pedavis, Pelekysgnathus, Polygnathus and Scaliognathus. The descriptions presented are arranged by genus in alphabetical order.

Each catalogue entry contains concise but comprehensive data about a taxon: The original reference is followed by details on the holotype, the locus typicus and the stratum typicum. The original diagnosis section is followed by a separate section on relations and current understanding of phylogenetic relationships. When necessary, the original diagnosis has been amended, revised or completed. A more or less complete list of synonyms expresses the subjective opinion of the respective catalogue author.
The section on age and range covers the vertical distribution of a taxon within the conodont zonation as well as general stratigraphic data and evidence on other associated index fossils. Each entry concludes with a section on the regional occurrence of the taxon. These occurences are listed according to continents, countries, and the geographic-geologic units from which they were reported by the original authors. In this section as well as in the synonymy lists, only references have been included that contain identifiable illustrations of the taxon under discussion. In addition, the section on regional occurrence includes data on the rocks yielding the described taxon. The completeness of these data, of course, dependson the information provided by the original author. In many cases, this section informs about the occurrence of the taxon in various types of lithologies. In this section as in others, the mode of spelling the names of the conodont zones is strictly in accord with the spelling given by the original author [asymmetricus-Zone and Neogondolella timorensis-Zone].

For illustration of species, photographs mounted on plates were given preference over line drawings; as a rule the holotype or, in rare cases, one of the syntypes is illustrated. In some cases only reproductions of the published illustration of the types were available. In a few cases where even these photographs were found to be unreproduceable, illustrations of hypotypes and topotypes of subsequent authors had to be used.
The descriptive part of Volume 1 is preceded by a glossary of morphological and nomenclatorial terms in English and German that, it is hoped, will facilitate the studies of the beginner and the non-specialist. Current knowledge of multielement taxonomy has increased remarkably during the past years. In the Catalogue it has been considered where pertinent. If there are no or only vague data on 'ltielement relations known, the taxa are treated according to form taxonomy. The entries of the Catalogue are arranged in alphabetical order so that future insertions will integrate smoothly.

Audience: geologists, paleontologists, biologists and their research institutes, students of these fields, oil and mining industry, scientific libraries.