Trilobiten.de

[Jens]

Ceratarges

Pierre Morzadec (1969): Ceratarges faouensis nov. sp. nouveau trilobite mesodevonien du Finistere. - Compte Rendu Sommaire des Seances de la Societe Geologique de France , 7: 255-256.

Allen R. Ormiston (1982): Terranovia, Arctic vicariant of the Devonian lichid Ceratarges (Trilobita). - Journal of Paleontology, 56: 1257 - 1265.

N. Hoeller (1987): Ceratarges armatus Goldfuss, ein Trilobit, in zweierlei Gestalt aus dem Mitteldevon der Eifel. - Der Aufschluss 38(11): 349-353.


David J. Holloway and Alan T. Thomas (2002): Hoplolichoides, Allolichas, Autoloxolichas and Akantharges, and the classification of lichid trilobites
Geobios, 35(1):111-125.

Abstract:
Hoplolichoides Phleger, 1936 and Autoloxolichas Phleger, 1936 are revised based on redescription of their type species, H. conicotuberculatus (Nieszkowski, 1859) and A. sanctamathiae (Schmidt, 1885) respectively. Hoplolichoides is considered to be most closely related to Hoplolichas Dames, 1877, and both are included in a revised Homolichinae. Autoloxolichas is restricted to its type species, and other species previously assigned to the genus are placed in Allolichas Krueger, 1992, the concept of which is expanded. Autoloxolichas and Allolichas are included together with three other genera and subgenera in the Subfamily Platylichinae, previously considered to be a junior synonym of Homolichinae. The hypostomal morphology previously regarded as important in uniting homolichine and platylichine genera is now regarded as primitive for the Lichidae. Metopolichas Gurich, 1901, previously included tentatively in the Homolichinae on the basis of its hypostomal morphology, is reassigned tentatively to the Lichinae. The trochurine Acanthopyge erbeni Meischner, 1965, from the Givetian of Germany, is assigned to Akantharges Phleger, 1936, permitting clarification of the pygidial morphology of the genus. Akantharges and Ceratarges Gurich, 1901 are unique amongst lichids in having a curved, transverse ridge on the posterolateral cranidial lobe, suggesting that these genera may have been derived from a common ancestor.

Radiaspis:

Jiri Kriz and Ilja Pek (1974): On the genus Radiaspis (Trilobita) from the Silurian and Devonian of the Central Bohemian Paleozoic. - Vestnik Ustredniho Ustavu Geologickeho = Bulletin of the Geological Survey, Prague, 49(3): 177-181.

Acanthopyge:

Harry Blackmore Whittington (1956): Beecher's lichid protaspis and Acanthopyge consanguinea (Trilobita) Journal of Paleontology, 30(5): 1200-1204, [New York].

Atsushi Kaneko (1984): A Middle Devonian trilobite fauna from the Kitakami Mountains, Northeast Japan; I, The Lichidae. - Transactions and Proceedings of the Palaeontological Society of Japan. New Series, 136 474-491.


Margaret Campbell (1994): Systematics of Silurian lichid trilobites from the Mackenzie Mountains, Canada. - University of Alberta, Edmonton, AB, Canada, Master's thesis: 208 pp.

Abstract:
Lichids are uncommon members of a silicified trilobite fauna from the Llandovery and Wenlock horizons of the Avalanche Lake sections in the central Mackenzie Mountains, Canada. Seventeen species of lichids, 16 of them previously undescribed, belong to 7 genera in 3 subfamilies: Dicranopeltis, subfamily Lichinae; Platylichas, subfamily Homolichinae; Acanthopyge, Borealarges, Dicranogmus, Radiolichas and Richterarges, subfamily Trochurinae. Borealarges is the best represented and most diverse of the genera with 7 species, Dicranogmus the second with 3 species. The Avalanche Lake sections represent a transition from shelf carbonates to deep water shales, but, in terms of lichid distribution, there is little difference between the most distal (AV5) and most proximal sections (AV2). The lichid population distribution is remarkably uniform in the Wenlock sections. Three species represent the earliest recorded occurrence of their genus: Acanthopyge (Lobopyge s. 1.) pristinus n. sp.; Radiolichas n. sp. A; and Richterarges facetus n. sp. Evidence of evolutionary relationships is seen in: Richterarges facetus n. sp. which retains characters associated with Borealarges; in Dicranogmus n. sp. A which provides evidence that Dicranogmus and Radiolichas are sister taxa; and in Acanthopyge (Lobopyge s. 1.) pristinus n. sp. which illustrates the connection between Hemiarges and Acanthopyge (Lobopyge). Platylichas has recently been divided into 2 subgenera (Thomas and Holloway, 1988) but Platylichas (Rontrippia) infimus n. sp. has morphological features of both, suggesting the concept of 2 subgenera requires reexamination. A phylogenetic analysis of Borealarges shows it to be a monophyletic clade, separate and distinct from Hemiarges and Richterarges. Protaspides and meraspides that can be assigned to 5 genera, Dicranopeltis, Platylichas, Borealarges, Dicranogmus, and Radiolichas, are described. This nearly doubles the previously described lichid ontogenies. The ontogenetic sequences provide support for ideas regarding onset of development and homologies of cranidial lobes, new information about relationships between taxa, and raise questions about current lichid classifications.

Henry Stewart Edgell (1955): A middle Devonian lichid trilobite from south-eastern Australia. - Palaeontologische Zeitschrift, 29(3-4): 136-145.

Abstract:
Describes Acanthopyge (Mephiarges) bifida n.sp. from silicified fragments in massive middle Devonian limestone of the Burrinjuck dam region, New South Wales. Notes on the associated invertebrate fauna are included, and difficulties in classification of the Lichidae resulting from anomalous lobation of the glabella are discussed.

B. D. E. Chatterton, B. D. Johnson, and K. S. W. Campbell (1979): Silicified Lower Devonian trilobites from New South Wales. - Palaeontology 22, Part 4: 799-837. (mit Acanthopyge, Ceratocephala)


Dieter Meischner (1965): Neue Trilobiten aus dem Devon des Kellerwaldes. - Fortschr. Geol. Rheinland Westfalen, 9: 119-150.

Abstract:
Material for a detailed description and partial reconstruction of the new species Acanthopyge erbeni and Nephranops? spectabilis, and a cranidium of Aulacopleura sp. have been found in siliceous banded upper Givetian (Devonian) shales in the northern Kellerwald region (Rhenish Schiefergebirge), Germany. The trilobite remains clearly indicate that the depositional site of the beds represents a moulting place. Full segmentation of the axis of the pygidium of A. erbeni and differentiation at the distal duplicature of the pleura of N. spectabilis are described for the first time.

[Jens]

In den folgenden Arbeiten sind Infos zu Lichiden enthalten.

H. Alberti (1979): Devonian trilobite biostratigraphy (in The Devonian System). - Special Papers in Palaeontology (23):313-324

Margaret Campbell and B. D. E. Chatterton (1993): Ontogeny of Silurian lichid trilobites. - (in , Anonymous,) Program with Abstracts - Geological Association of Canada; Mineralogical Association of Canada; Canadian Geophysical Union, Joint Annual Meeting 1993: 16.

B. D. E. Chatterton, B. D. Johnson, and K. S. W. Campbell (1979): Silicified Lower Devonian trilobites from New South Wales
Palaeontology, 22, Part 4: 799-837.

Brian D. E. Chatterton and David G. Perry (1983): Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. -Palaeontographica Canadiana, 1: 127 pp.

Gregory D. Edgecombe, Maxwell R. Banks, and Doris M. Banks (2004): Late Ordovician trilobites from Tasmania; Styginidae, Asaphidae and Lichidae (in Cambro-Ordovician studies I, Laurie,). - Memoir of the Association of Australasian Palaeontologists 30: 59-77.

Henry Stewart Edgell (1955): A middle Devonian lichid trilobite from south-eastern Australia. - Palaeontologische Zeitschrift 29(3-4):136-145

William Robert Evitt (1951): Some Middle Ordovician trilobites of the families Cheiruridae, Harpidae and Lichidae. - Journal of Paleontology, Sep ; 25: 587 - 616.

Y. Howells (1982): Scottish Silurian trilobites. - Palaeontographical Society Monographs , 135(561):106 pp.

Atsushi Kaneko (1984): A Middle Devonian trilobite fauna from the Kitakami Mountains, Northeast Japan; I, The Lichidae. -
Transactions and Proceedings of the Palaeontological Society of Japan. New Series, 136 474-491.

Frithjof Luetke (1965): Zur Kenntnis herzynischer Trilobiten aus dem Unter- und Mitteldevon des Harzes. - Palaeontographica. Abteilung A: Palaeozoologie-Stratigraphie 124, Part 4-6: 151-233.

Lars Ramsköld and B. D. E. Chatterton (1991): Revision and subdivision of the polyphyletic "Leonaspis" (Trilobita). - Transactions of the Royal Society of Edinburgh: Earth Sciences, 82(4): 333-371.

Ronald Pearson Tripp (1957): The classification and evolution of the superfamily Lichacea (Trilobita). - Geological Magazine, Mar ; 94: 104 - 122.

A. Pribyl, J. Vanek, and F. Horbinger (1986): New trilobites of the families Odontopleuridae, Lichidae and Raphiophoridae from the Silurian and Devonian of central Bohemia. - Casopis pro Mineralogii a Geologii 31(3):267-278

David M. Rudkin, Ronald P. Tripp, and Rolf Ludvigsen (1976) (1994):
The Ordovician trilobite genus Hemiarges (Lichidae: Trochurinae) from North America and Greenland (in Studies in stratigraphy and paleontology in honor of Donald W. Fisher, Landing,). - Bulletin - New York State Museum, 481: 289-306.

R. P. Tripp and W. R. Evitt (1981): Silicifield Lichidae (Trilobita) from the Middle Ordovician of Virginia. - Geological Magazine, Nov; 118: 665 - 677.

Elsa Warburg (1939): The Swedish Ordovician and lower Silurian Lichidae Kungl. Svenska Vetenskapsakademiens Handlingar, 17(4): 162 pp.

Walter Frederick Whittard (1960): The Ordovician trilobites of the Shelve inlier, west Shropshire, pt. 5, Part 6: 163-196.

Harry Blackmore Whittington 1956): Silicified Middle Ordovician trilobites; the Odontopleuridae. - Bulletin of the Museum of Comparative Zoology. Harvard University, 114(5): 153-288.

Harry Blackmore Whittington (1956): Type and other species of Odontopleuridae (Trilobita). - Journal of Paleontology, 30(3): 504-520.

Harry Blackmore Whittington (1956): Beecher's lichid protaspis and Acanthopyge consanguinea (Trilobita) [New York]. - Journal of Paleontology, 30(5): 1200-1204.

Harry B. Whittington (1962): A monograph of the Ordovician trilobites of the Bala area, Merioneth, pt. I. - 32 pp.

[Jens]

Lobopyge:

Malte C. Ebach and Shane T. Ahyonge (2001): Phylogeny of the Trilobite Subgenus Acanthopyge (Lobopyge). - Cladistics, 17 (1), 1-10.

Abstract
Cladistic analysis of the trilobite subgenus Acanthopyge (Lobopyge)has not been previously attempted, apart from an inferred phylogeny of the Lichida by Thomas and Holloway (1988, Philos. Trans. R. Soc. London B Biol. Sci. 321, 179–262). Results of two separate analyses with variable taxonomic sampling show a possible cosmopolitan affinity for Australian Devonian species of A. (Lobopyge) and corroborate the placement of A. (Lobopyge) rohri in A. (Lobopyge). Benelopyge is a junior subjective synonym of A. (Lobopyge).