ABSTRACT New, undescribed material of the hybodont shark Tribodus limae, from the Lower Cretaceou... more ABSTRACT New, undescribed material of the hybodont shark Tribodus limae, from the Lower Cretaceous of northeastern Brazil, provides new information on the pectoral endoskeleton in this taxon. This allows for a revision of its pectoral morphology, which may be broadly applicable to other Hybodontoidei. Four new specimens of Tribodus with well-preserved pectoral girdles are described, including the first complete, three-dimensionally preserved hybodont scapulocoracoid and partial pectoral fin. These specimens permit ...
ABSTRACT Although the type species of Ophiopsis was long considered O. procera, the genus origina... more ABSTRACT Although the type species of Ophiopsis was long considered O. procera, the genus originally included the single species Ophiopsis muensteri, which subsequent authors moved to Furo. Following the International Commission on Zoological Nomenclature code, Furo muensteri is here recognized as the type species of Ophiopsis by monotypy (Article 68.3). Ophiopsiella, gen. nov., is erected to include all remaining previously described ‘Ophiopsis’ species. Exceptionally well preserved new Ophiopsiella attenuata from the Upper Jurassic plattenkalk of Ettling (Bavaria, Germany) represents the first record of this species from Ettling, allowing for a partial revision of it and Ophiopsiella procera. New evidence allows for an emended diagnosis of Ophiopsiella attenuata, which differs from all other Ophiopsidae in the following combination of features: 27–28 dorsal fin rays, 42 vertical scale rows, and a long, low, posteroventrally inclined dorsal fin lacking elongate anterior fin rays or a strongly concave posterior border. A neotype for O. attenuata is designated, as the type is lost. ‘Ophiopsis’ attenuata actually contains two anatomically different morphotypes corresponding to distinct species, one of which is indistinguishable from ‘Ophiopsis’ procera. Exceptional preservation of the new material provides new morphological information, particularly regarding the dermal cranial bones. This revision changes the known distribution of ophiopsids in the Upper Jurassic of southern Germany and France, with possible broader paleobiogeographic and paleoecological implications for this region during the Late Jurassic. Ophiopsids remain poorly known compared with other halecomorphs (e.g., Amiidae), and closer investigation of their morphology and taxonomic relationships is therefore important to understanding broader patterns of halecomorph evolution.
The first detailed description of Furo muensteri is provided based on new well-preserved material... more The first detailed description of Furo muensteri is provided based on new well-preserved material from the Upper Jurassic of Ettling (Bavaria), the first record of Furo from this locality. Previously unknown features (circumorbital series, skull roof, maxilla, dorsal fin) are described. The corrected Latinized spelling replaces the original specific epithet “münsteri,” in accordance with Article 32.5 of the International Congress of Zoological Nomenclature code. Furo muensteri is diagnosed, among other features, by: pectoral fins as long as head; head length approximately 19% of standard length; 12 dorsal fin rays; 61 vertical scale rows from supracleithrum to hinge line; shape of ventral suborbital and position of its pit line; and morphology and arrangement of the maxilla and supramaxilla (gracile maxilla with deep posterodorsal angle and strongly tapered anteriorly; supramaxilla approximately 70% maxilla length, of uniform dorsoventral thickness, and with elongate anterior margin tapered to a point). Comparison with other Furo taxa reveals that F. muensteri is morphologically indistinguishable from F. praelongus (upper Kimmeridgian, Cerin, France). The two species are here synonymized, with F. praelongus becoming the junior synonym of F. muensteri (which has priority). Furo muensteri is also compared to the type species, F. orthostomus, and is currently retained in Furo pending a more detailed analysis of the genus. Presence of a sensory canal on the maxilla provides further evidence that Furo is sister to all other ophiopsids. Furo muensteri is currently known only from upper Kimmeridgian localities of Bavaria and France, except for Ettling whose exact geological age remains unknown.
<p>A, facies map of the Solnhofen Archipelago of southern Germany, with the locality of Ett... more <p>A, facies map of the Solnhofen Archipelago of southern Germany, with the locality of Ettling marked by a star, modified from Röper et al., 2000 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116140#pone.0116140.ref011" target="_blank">11</a>]; B, overview of the Ettling quarry, September 2011, showing the JME field team at work. [Planned for 2-column width.]</p
The newly recognized Konservat-Lagerstätte of Ettling (Bavaria), field site of the Jura-Museum Ei... more The newly recognized Konservat-Lagerstätte of Ettling (Bavaria), field site of the Jura-Museum Eichstätt (JME), is unique among Late Jurassic plattenkalk basins (Solnhofen region) in its abundant, extremely well preserved fossil vertebrates, almost exclusively fishes. We report actinopterygians (ginglymodins, pycnodontiforms, halecomorphs, aspidorynchiforms, "pholidophoriforms," teleosts); turtles; and non-vertebrates (echinoderms, arthropods, brachiopods, mollusks, jellyfish, sponges, biomats, plants) in a current faunal list. Ettling has yielded several new fish species (Bavarichthys incognitus; Orthogonikleithrus hoelli; Aspidorhynchus sanzenbacheri; Macrosemimimus fegerti). Upper and lower Ettling strata differ in faunal content, with the lower dominated by the small teleost Orthogonikleithrus hoelli (absent from the upper layers, where other prey fishes, Leptolepides sp. and Tharsis sp., occur instead). Pharyngeal and stomach contents of Ettling fishes provide direct ...
ABSTRACT We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae... more ABSTRACT We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae (Neopterygii: Ginglymodi), from the Upper Jurassic (late Kimmeridgian to early Tithonian) of the Solnhofen Archipelago (Germany) and Cerin (France). Palaeomacrosemius, gen. nov., is characterized primarily by the following features: presence of vertical scale rows that do not dichotomize dorsal to the lateral line (unlike members of the genus Macrosemius Agassiz); a long dorsal fin with 32–33 dorsal fin rays; and a smaller scale-free area immediately ventrolateral to the dorsal fin compared with Macrosemius. Small, hook-like spines located on the posterolateral border of the principal dorsal fin rays may have functioned in reproductive behavior. We also review the currently known species of Macrosemius (M. rostratus Agassiz and M. fourneti Thiollière) from the Upper Jurassic plattenkalk of southern Germany and Cerin, France. Macrosemius rostratus, which we here restrict to the German plattenkalk basins of Eichstätt and Solnhofen (Tithonian above the eigeltingense horizon), is mainly characterized by the presence of 37–39 dorsal fin rays, which are very long in adult specimens. Macrosemius fourneti is mainly characterized by the presence of 34–35 dorsal fin rays, which are broader in the posterior part of the fin. Although M. fourneti was previously known only from Cerin, France, we here describe it for the first time from the older plattenkalk of Brunn (southern Germany, late Kimmeridgian).
Labyrinth morphology in extant elasmobranchs (neoselachians: sharks, skates and rays) and several... more Labyrinth morphology in extant elasmobranchs (neoselachians: sharks, skates and rays) and several extinct chondrichthyans ranging in age from Pliocene to Devonian is investigated using high-resolution computed tomography (CT scanning) and digital reconstitution techniques. The elasmobranch labyrinth is highly specialized toward low-frequency semi-directional sound detection (LFSDP), optimally around 100Hz. Several features associated with LFSDP in neoselachians also occur in Mesozoic hybodonts (eg, ...
UMI, ProQuest ® Dissertations &amp; Theses. The world&#x27;s most comprehensive collectio... more UMI, ProQuest ® Dissertations &amp; Theses. The world&#x27;s most comprehensive collection of dissertations and theses. Learn more... ProQuest, The morphology and relationships of the hybodont shark Tribodus limae with a phylogenetic ...
We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae (Neopter... more We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae (Neopterygii: Ginglymodi), from the Upper Jurassic (late Kimmeridgian to early Tithonian) of the Solnhofen Archipelago (Germany) and Cerin (France). Palaeomacrosemius, gen. nov., is characterized primarily by the following features: presence of vertical scale rows that do not dichotomize dorsal to the lateral line (unlike members of the genus Macrosemius Agassiz); a long dorsal fin with 32–33 dorsal fin rays; and a smaller scale-free area immediately ventrolateral to the dorsal fin compared with Macrosemius. Small, hook-like spines located on the posterolateral border of the principal dorsal fin rays may have functioned in reproductive behavior. We also review the currently known species of Macrosemius (M. rostratus Agassiz and M. fourneti Thiolliere) from the Upper Jurassic plattenkalk of southern Germany and Cerin, France. Macrosemius rostratus, which we here restrict to the German plattenkalk basins of Eichst€att and Solnhofen (Tithonian above the eigeltingense horizon), is mainly characterized by the presence of 37–39 dorsal fin rays, which are very long in adult specimens. Macrosemius fourneti is mainly characterized by the presence of 34–35 dorsal fin rays, which are broader in the posterior part of the fin. Although M. fourneti was previously known only from Cerin, France, we here describe it for the first time from the older plattenkalk of Brunn (southern Germany, late Kimmeridgian).
ABSTRACT New, undescribed material of the hybodont shark Tribodus limae, from the Lower Cretaceou... more ABSTRACT New, undescribed material of the hybodont shark Tribodus limae, from the Lower Cretaceous of northeastern Brazil, provides new information on the pectoral endoskeleton in this taxon. This allows for a revision of its pectoral morphology, which may be broadly applicable to other Hybodontoidei. Four new specimens of Tribodus with well-preserved pectoral girdles are described, including the first complete, three-dimensionally preserved hybodont scapulocoracoid and partial pectoral fin. These specimens permit ...
ABSTRACT Although the type species of Ophiopsis was long considered O. procera, the genus origina... more ABSTRACT Although the type species of Ophiopsis was long considered O. procera, the genus originally included the single species Ophiopsis muensteri, which subsequent authors moved to Furo. Following the International Commission on Zoological Nomenclature code, Furo muensteri is here recognized as the type species of Ophiopsis by monotypy (Article 68.3). Ophiopsiella, gen. nov., is erected to include all remaining previously described ‘Ophiopsis’ species. Exceptionally well preserved new Ophiopsiella attenuata from the Upper Jurassic plattenkalk of Ettling (Bavaria, Germany) represents the first record of this species from Ettling, allowing for a partial revision of it and Ophiopsiella procera. New evidence allows for an emended diagnosis of Ophiopsiella attenuata, which differs from all other Ophiopsidae in the following combination of features: 27–28 dorsal fin rays, 42 vertical scale rows, and a long, low, posteroventrally inclined dorsal fin lacking elongate anterior fin rays or a strongly concave posterior border. A neotype for O. attenuata is designated, as the type is lost. ‘Ophiopsis’ attenuata actually contains two anatomically different morphotypes corresponding to distinct species, one of which is indistinguishable from ‘Ophiopsis’ procera. Exceptional preservation of the new material provides new morphological information, particularly regarding the dermal cranial bones. This revision changes the known distribution of ophiopsids in the Upper Jurassic of southern Germany and France, with possible broader paleobiogeographic and paleoecological implications for this region during the Late Jurassic. Ophiopsids remain poorly known compared with other halecomorphs (e.g., Amiidae), and closer investigation of their morphology and taxonomic relationships is therefore important to understanding broader patterns of halecomorph evolution.
The first detailed description of Furo muensteri is provided based on new well-preserved material... more The first detailed description of Furo muensteri is provided based on new well-preserved material from the Upper Jurassic of Ettling (Bavaria), the first record of Furo from this locality. Previously unknown features (circumorbital series, skull roof, maxilla, dorsal fin) are described. The corrected Latinized spelling replaces the original specific epithet “münsteri,” in accordance with Article 32.5 of the International Congress of Zoological Nomenclature code. Furo muensteri is diagnosed, among other features, by: pectoral fins as long as head; head length approximately 19% of standard length; 12 dorsal fin rays; 61 vertical scale rows from supracleithrum to hinge line; shape of ventral suborbital and position of its pit line; and morphology and arrangement of the maxilla and supramaxilla (gracile maxilla with deep posterodorsal angle and strongly tapered anteriorly; supramaxilla approximately 70% maxilla length, of uniform dorsoventral thickness, and with elongate anterior margin tapered to a point). Comparison with other Furo taxa reveals that F. muensteri is morphologically indistinguishable from F. praelongus (upper Kimmeridgian, Cerin, France). The two species are here synonymized, with F. praelongus becoming the junior synonym of F. muensteri (which has priority). Furo muensteri is also compared to the type species, F. orthostomus, and is currently retained in Furo pending a more detailed analysis of the genus. Presence of a sensory canal on the maxilla provides further evidence that Furo is sister to all other ophiopsids. Furo muensteri is currently known only from upper Kimmeridgian localities of Bavaria and France, except for Ettling whose exact geological age remains unknown.
<p>A, facies map of the Solnhofen Archipelago of southern Germany, with the locality of Ett... more <p>A, facies map of the Solnhofen Archipelago of southern Germany, with the locality of Ettling marked by a star, modified from Röper et al., 2000 [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0116140#pone.0116140.ref011" target="_blank">11</a>]; B, overview of the Ettling quarry, September 2011, showing the JME field team at work. [Planned for 2-column width.]</p
The newly recognized Konservat-Lagerstätte of Ettling (Bavaria), field site of the Jura-Museum Ei... more The newly recognized Konservat-Lagerstätte of Ettling (Bavaria), field site of the Jura-Museum Eichstätt (JME), is unique among Late Jurassic plattenkalk basins (Solnhofen region) in its abundant, extremely well preserved fossil vertebrates, almost exclusively fishes. We report actinopterygians (ginglymodins, pycnodontiforms, halecomorphs, aspidorynchiforms, "pholidophoriforms," teleosts); turtles; and non-vertebrates (echinoderms, arthropods, brachiopods, mollusks, jellyfish, sponges, biomats, plants) in a current faunal list. Ettling has yielded several new fish species (Bavarichthys incognitus; Orthogonikleithrus hoelli; Aspidorhynchus sanzenbacheri; Macrosemimimus fegerti). Upper and lower Ettling strata differ in faunal content, with the lower dominated by the small teleost Orthogonikleithrus hoelli (absent from the upper layers, where other prey fishes, Leptolepides sp. and Tharsis sp., occur instead). Pharyngeal and stomach contents of Ettling fishes provide direct ...
ABSTRACT We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae... more ABSTRACT We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae (Neopterygii: Ginglymodi), from the Upper Jurassic (late Kimmeridgian to early Tithonian) of the Solnhofen Archipelago (Germany) and Cerin (France). Palaeomacrosemius, gen. nov., is characterized primarily by the following features: presence of vertical scale rows that do not dichotomize dorsal to the lateral line (unlike members of the genus Macrosemius Agassiz); a long dorsal fin with 32–33 dorsal fin rays; and a smaller scale-free area immediately ventrolateral to the dorsal fin compared with Macrosemius. Small, hook-like spines located on the posterolateral border of the principal dorsal fin rays may have functioned in reproductive behavior. We also review the currently known species of Macrosemius (M. rostratus Agassiz and M. fourneti Thiollière) from the Upper Jurassic plattenkalk of southern Germany and Cerin, France. Macrosemius rostratus, which we here restrict to the German plattenkalk basins of Eichstätt and Solnhofen (Tithonian above the eigeltingense horizon), is mainly characterized by the presence of 37–39 dorsal fin rays, which are very long in adult specimens. Macrosemius fourneti is mainly characterized by the presence of 34–35 dorsal fin rays, which are broader in the posterior part of the fin. Although M. fourneti was previously known only from Cerin, France, we here describe it for the first time from the older plattenkalk of Brunn (southern Germany, late Kimmeridgian).
Labyrinth morphology in extant elasmobranchs (neoselachians: sharks, skates and rays) and several... more Labyrinth morphology in extant elasmobranchs (neoselachians: sharks, skates and rays) and several extinct chondrichthyans ranging in age from Pliocene to Devonian is investigated using high-resolution computed tomography (CT scanning) and digital reconstitution techniques. The elasmobranch labyrinth is highly specialized toward low-frequency semi-directional sound detection (LFSDP), optimally around 100Hz. Several features associated with LFSDP in neoselachians also occur in Mesozoic hybodonts (eg, ...
UMI, ProQuest ® Dissertations &amp; Theses. The world&#x27;s most comprehensive collectio... more UMI, ProQuest ® Dissertations &amp; Theses. The world&#x27;s most comprehensive collection of dissertations and theses. Learn more... ProQuest, The morphology and relationships of the hybodont shark Tribodus limae with a phylogenetic ...
We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae (Neopter... more We describe Palaeomacrosemius thiollieri, gen. et sp. nov., a new genus of Macrosemiidae (Neopterygii: Ginglymodi), from the Upper Jurassic (late Kimmeridgian to early Tithonian) of the Solnhofen Archipelago (Germany) and Cerin (France). Palaeomacrosemius, gen. nov., is characterized primarily by the following features: presence of vertical scale rows that do not dichotomize dorsal to the lateral line (unlike members of the genus Macrosemius Agassiz); a long dorsal fin with 32–33 dorsal fin rays; and a smaller scale-free area immediately ventrolateral to the dorsal fin compared with Macrosemius. Small, hook-like spines located on the posterolateral border of the principal dorsal fin rays may have functioned in reproductive behavior. We also review the currently known species of Macrosemius (M. rostratus Agassiz and M. fourneti Thiolliere) from the Upper Jurassic plattenkalk of southern Germany and Cerin, France. Macrosemius rostratus, which we here restrict to the German plattenkalk basins of Eichst€att and Solnhofen (Tithonian above the eigeltingense horizon), is mainly characterized by the presence of 37–39 dorsal fin rays, which are very long in adult specimens. Macrosemius fourneti is mainly characterized by the presence of 34–35 dorsal fin rays, which are broader in the posterior part of the fin. Although M. fourneti was previously known only from Cerin, France, we here describe it for the first time from the older plattenkalk of Brunn (southern Germany, late Kimmeridgian).
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Papers by Jennifer Lane
Ginglymodi), from the Upper Jurassic (late Kimmeridgian to early Tithonian) of the Solnhofen Archipelago (Germany) and
Cerin (France). Palaeomacrosemius, gen. nov., is characterized primarily by the following features: presence of vertical scale
rows that do not dichotomize dorsal to the lateral line (unlike members of the genus Macrosemius Agassiz); a long dorsal fin
with 32–33 dorsal fin rays; and a smaller scale-free area immediately ventrolateral to the dorsal fin compared with
Macrosemius. Small, hook-like spines located on the posterolateral border of the principal dorsal fin rays may have
functioned in reproductive behavior. We also review the currently known species of Macrosemius (M. rostratus Agassiz and
M. fourneti Thiolliere) from the Upper Jurassic plattenkalk of southern Germany and Cerin, France. Macrosemius rostratus,
which we here restrict to the German plattenkalk basins of Eichst€att and Solnhofen (Tithonian above the eigeltingense
horizon), is mainly characterized by the presence of 37–39 dorsal fin rays, which are very long in adult specimens.
Macrosemius fourneti is mainly characterized by the presence of 34–35 dorsal fin rays, which are broader in the posterior part
of the fin. Although M. fourneti was previously known only from Cerin, France, we here describe it for the first time from the
older plattenkalk of Brunn (southern Germany, late Kimmeridgian).
Ginglymodi), from the Upper Jurassic (late Kimmeridgian to early Tithonian) of the Solnhofen Archipelago (Germany) and
Cerin (France). Palaeomacrosemius, gen. nov., is characterized primarily by the following features: presence of vertical scale
rows that do not dichotomize dorsal to the lateral line (unlike members of the genus Macrosemius Agassiz); a long dorsal fin
with 32–33 dorsal fin rays; and a smaller scale-free area immediately ventrolateral to the dorsal fin compared with
Macrosemius. Small, hook-like spines located on the posterolateral border of the principal dorsal fin rays may have
functioned in reproductive behavior. We also review the currently known species of Macrosemius (M. rostratus Agassiz and
M. fourneti Thiolliere) from the Upper Jurassic plattenkalk of southern Germany and Cerin, France. Macrosemius rostratus,
which we here restrict to the German plattenkalk basins of Eichst€att and Solnhofen (Tithonian above the eigeltingense
horizon), is mainly characterized by the presence of 37–39 dorsal fin rays, which are very long in adult specimens.
Macrosemius fourneti is mainly characterized by the presence of 34–35 dorsal fin rays, which are broader in the posterior part
of the fin. Although M. fourneti was previously known only from Cerin, France, we here describe it for the first time from the
older plattenkalk of Brunn (southern Germany, late Kimmeridgian).