Two new stephanoceratid ammonites from the Aalenian-Lower Bajocian (Middle Jurassic, Dorset, UK) and their phylogenetic significance

被引：5

作者：

Chandler, Robert B. ^{[1
]}

机构：

[1] Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England

来源：

PROCEEDINGS OF THE GEOLOGISTS ASSOCIATION | 2019年 / 130卷 / 3-4期

关键词：

Ammonite; Biostratigraphy; Dorset; Inferior Oolite; Jurassic; Stephanoceratidae; INFERIOR OOLITE; STRATIGRAPHY; REVISION; QUARRY;

D O I：

10.1016/j.pgeola.2018.05.003

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Two new species of stephanoceratid ammonites are erected: Stephanoceras (Riccardiceras) eoeteosum sp. nov. and Stephanoceras (Skirroceras) englandi sp. nov. from the Inferior Oolite Formation of Dorset, UK. They represent the first and last members of a chronocline of serpenticonic morphospecies. The stratigraphical position of Rhytostephanus rhytus Buckman is reviewed, necessitating a change in the faunal horizon scheme. The term mesoconch is proposed for use in describing microsomic macroconchs, the function of which is considered. Names applied to morphospecies and their uses are reviewed. The role of conservation is discussed in respect of preserving Dorset Inferior Oolite exposures. (C) 2018 The Geologists' Association. Published by Elsevier Ltd. All rights reserved.

引用

页码：307 / 325

页数：19

共 7 条

[1] Lytoceratid ammonites from the Inferior Oolite Formation (Middle Jurassic, Aalenian and Bajocian) of Dorset (United Kingdom)
Whicher, John T.
Chandler, Robert B.
Hoffmann, Rene
PROCEEDINGS OF THE GEOLOGISTS ASSOCIATION, 2023, 134 (02) : 216 - 245
[2] New records of rare ammonite species from the Inferior Oolite Formation (Middle Jurassic, Aalenian and Lower Bajocian) of Dorset
Chandler, Robert B.
PROCEEDINGS OF THE GEOLOGISTS ASSOCIATION, 2021, 132 (03) : 316 - 323
[3] The Middle Jurassic stephanoceratid ammonite Kumatostephanus from Dorset and Somerset, UK, and its evolution
Chandler, Robert Baron
Whicher, John
Grulke, Wolfgang
Cowap, Andy
GEOBIOS, 2013, 46 (04) : 285 - 297
[4] Pseudoteloceras, a new stephanoceratid genus (Ammonitida) of the lower Humphriesianum Zone (lower Bajocian, Middle Jurassic) from western Tethys
Pavia, Giulio
Fernandez-Lopez, Sixto
PROCEEDINGS OF THE GEOLOGISTS ASSOCIATION, 2016, 127 (02) : 196 - 209
[5] New data on the Lower Bajocian (Middle Jurassic) ammonite genus Mollistephanus Buckman, 1922 from southern England
Chandler, RB
Dietze, V
PROCEEDINGS OF THE GEOLOGISTS ASSOCIATION, 2004, 115 : 221 - 234
[6] A new ammonite faunal horizon in the Ovale Zone (Middle Jurassic, Lower Bajocian) and observations on the ammonite genus Sonninia at Coombe Quarry, Mapperton, near Beaminster, Dorset
Chandler, Robert Baron
PROCEEDINGS OF THE GEOLOGISTS ASSOCIATION, 2019, 130 (06) : 772 - 791
[7] RECONSTRUCTION AND PHYLOGENETIC SIGNIFICANCE OF A NEW EQUISETUM LINNAEUS SPECIES FROM THE LOWER JURASSIC OF CERRO BAYO (CHUBUT PROVINCE, ARGENTINA)
Elgorriaga, Andres
Escapa, Ignacio H.
Bomfleur, Benjamin
Cuneo, Ruben
Ottone, Eduardo G.
AMEGHINIANA, 2015, 52 (01) : 135 - 152

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