Fig 5 - uploaded by Norbert Micklich
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†Oechsleria unterfeldensis gen. et. sp. nov., reconstruction of the skull in lateral view. a general overview; b same, graphical interpretation. Diagonally hatched areas are not or insufficiently preserved in the fossils; graphical differentiation same as in Fig. 3 otherwise
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These are the first and so far only records of a sailfin velifer fish from the Lower Oligocene of the Unterfeld (“Frauenweiler”) clay pit at Rauenberg (S Germany), and only the fourth fossil skeletal finds of this group worldwide. The new genus and species † Oechsleria unterfeldensis is described in detail, diagnosed, and compared to other fossil a...
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Context 1
... 3). It has a comparatively weakly developed and short ascending process that is slightly less than 1.3 times longer than the alveolar one. This is distinctively less than in the other fossil and extant species (between 2.05 in †Nardovelifer altipinnis and up to 5.34 in Metavelifer multiradiatus;see Sorbini andSorbini 1999 andOlney et al. 1993: Fig. 5). Both processes enclose an angle of more than 110°. A postmaxillary process is not discernible in the available materials. The maxilla is robust and has an almost straight longitudinal axis (Fig. 4c). It measures slightly more than 36% of the HL. Only the anterior articular process (nomenclature sensu Keivany 2014) is completely ...
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... other skull elements are preserved. A reconstruction of the skull together with the shoulder girdle is given in Fig. ...
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... 3). It has a comparatively weakly developed and short ascending process that is slightly less than 1.3 times longer than the alveolar one. This is distinctively less than in the other fossil and extant species (between 2.05 in †Nardovelifer altipinnis and up to 5.34 in Metavelifer multiradiatus;see Sorbini andSorbini 1999 andOlney et al. 1993: Fig. 5). Both processes enclose an angle of more than 110°. A postmaxillary process is not discernible in the available materials. The maxilla is robust and has an almost straight longitudinal axis (Fig. 4c). It measures slightly more than 36% of the HL. Only the anterior articular process (nomenclature sensu Keivany 2014) is completely ...
Context 5
... other skull elements are preserved. A reconstruction of the skull together with the shoulder girdle is given in Fig. ...
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Citations
... †Oligolophotes from the early Oligocene of Russia (Bannikov, 1999). These Russian deposits also yield the incertae sedis deep-bodied genera †Analectis and †Natgeosocus (Bannikov, 2014;Daniltshenko, 1980), with strata of comparable age in Germany yielding the veliferid †Oechsleria (Micklich & Bannikov, 2023). Unambiguous Lampridae are only known in the fossil record by the large-bodied †Megalampris from the Chattian (late Oligocene) of New Zealand (Gottfried et al., 2006) and by numerous specimens of Lampris from the Miocene of California (David, 1943;Jordan & Gilbert, 1919). ...
The early Eocene fossil assemblage of the London Clay (Southeastern England) is a key window to the early Paleogene diversification of teleost fishes in the open ocean. Despite their three-dimensional preservation that offers unique insight into skeletal anatomy, the London Clay fossils are still poorly described for the most part. †Whitephippus tamensis is a fossil teleost from this assemblage, known by several well-preserved specimens. Based on a complete description of the known material, including previously hidden structures (braincase, hyoid, and branchial arches) revealed through 3D microtomography, we reinterpret †Whitephippus as an early member of the teleost group Lampriformes. More specifically, the anatomy of †Whitephippus indicates that it is likely a member of the so-called 'pelagic clade' including modern opahs and oarfishes. This redescription of †Whitephippus provides the earliest definitive evidence of lampriforms conquering the pelagic environment, alongside numerous other teleost lineages.
... Character states from added operational taxonomic units (OTUs) were scored based on examination of specimens in the collections of the Muséum National d'Histoire Naturelle, Paris, France ( †Babelichthys olneyi, †Protolophotus elami), and from the literature (see Danilit'chenko 1962, Arambourg 1966, Bannikov 1999, Davesne 2017, Carnevale and Bannikov 2018. We did not include the extinct taxa †Bathysoma lutkeni, †Palaeocentrotus boggildi, and the recently described †Oechsleria unterfeldensis (Micklich and Bannikov 2023), because all of these to our knowledge are known from one or two partial skeletons with poorly preserved cranial material, making them non-ideal for phylogenetic analysis. Further, as similarly-aged or older species of equivalent taxonomic position are included in the phylogeny, including these taxa would not provide additional information to aid with divergence times that would justify overlooking their poorly-characterized morphology. ...
Ray-finned fishes, which compose nearly half of living vertebrate diversity, provide an excellent system for studying the evolution of novel body forms. Lampriformes is a species-poor lineage of acanthomorph ray-finned fishes that has evolved two very different and highly specialized body plans suited to life in pelagic oceanic habitats: the deep, round-bodied bathysomes and the ribbon-like taeniosomes. Here, we present a new phylogenetic hypothesis and divergence time estimates for lampriform fishes based on an updated morphological dataset and DNA sequences from nuclear genes for all but one of the living lampriform families and 55% of recognized extant genera. Our analyses resolve two major clades in Lampriformes: the Bathysomi and the Taeniosomi. A time calibrated phylogeny shows that the origin of living lampriforms coincides with the aftermath of the Cretaceous–Palaeogene extinction and that anatomically modern pelagic morphotypes evolved 10 Myr after the start of the Palaeogene.
... The Paleogene lampriform fossil record includes a variety of taeniosomes, all assigned to Lophotidae: †Eolophotes from the Lutetian of Georgia (Daniltshenko, 1980), †Protolophotus and †Babelichthys from the late Eocene of Iran (Arambourg, 1943;Davesne, 2017;Walters, 1957) and †Oligolophotes from the early Oligocene of Russia (Bannikov, 1999). These Russian deposits also yield the incertae sedis deep-bodied genera †Analectis and †Natgeosocus (Bannikov, 2014;Daniltshenko, 1980), with strata of comparable age in Germany yielding the veliferid †Oechsleria (Micklich & Bannikov, 2023). Unambiguous Lampridae are only known in the fossil record by the large-bodied †Megalampris from the Chattian (late Oligocene) of New Zealand (Gottfried et al., 2006) and by numerous specimens of Lampris from the Miocene of California (David, 1943;Jordan & Gilbert, 1919). ...
The early Eocene fossil assemblage of the London Clay (Southeastern England) is a key window to the early Palaeogene diversification of teleost fishes in the open ocean. Despite their three-dimensional preservation that offers unique insight into skeletal anatomy, the London Clay fossils are still poorly described for the most part. Whitephippus tamensis is a fossil teleost from this assemblage, known by several well-preserved specimens. Based on a complete description of the known material, including hidden structures (braincase, hyoid and branchial arches) revealed through 3D microtomography, we reinterpret Whitephippus as an early member of the teleost group Lampriformes. More specifically, the anatomy of Whitephippus indicates that it is likely a member of the so-called "pelagic clade" including modern opahs and oarfishes. This redescription of Whitephippus provides the earliest definitive evidence of lampriforms conquering the pelagic environment, alongside numerous other teleost lineages.
