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1.
Ankylosaurian remains from the Transylvanian Basin, Romania, are extremely rare. More than 100 years after the discovery of the first and only better-known assemblage, namely the type material of Struthiosaurus transylvanicus, new ankylosaurian material has been discovered in the Maastrichtian of the Ha?eg Basin, as well as at another locality (Vurp?r), in the Transylvanian Basin, that is described here. The material consists of one tooth in a small jaw fragment (from the Ha?eg Basin) and at least two accummulations of associated, as well as several isolated, postcranial elements (from Vurp?r). No diagnostic elements are preserved that would overlap with the type of S. transylvanicus, so we cannot assign any of the new specimens to this species. The tooth shows marked differences compared to those of other anklyosaurs including S. austriacus and Hungarosaurus in having only six, more or less equally sized, apically pointed cusps separated by deep grooves. The postcranial material from Vurp?r represents at least three different individuals. The humerus is the most diagnostic element among the postcranial remains being most similar both in size and morphology to humeri referred to as Struthiosaurus from different European localities, thus here we refer the humerus and probably associated elements preserved in one assemblage to as cf. Struthiosaurus sp.; the remaining specimens from Vurp?r are retained as Nodosauridae indet. Histological studies have confirmed the adult nature of all sampled bones in the Vurp?r ankylosaur material suggesting that these fully grown animals were of similar size to Struthiosaurus, a small-bodied nodosaurid the ontogenetic status of which, however, has never been investigated histologically. The obviously diminished body size of the Transylvanian ankylosaurs compared to other members of the clade could be explained by insular dwarfism using the same histology-based argument as presented for Magyarosaurus. 相似文献
2.
Oliver Hampe 《Pal?ontologische Zeitschrift》2013,87(4):473-491
Gronausaurus wegneri n. gen. n. sp. represents a newly discovered leptocleidid sauropterygian based on one individual from the Early Cretaceous (Berriasian) of Gronau in Westphalia, Germany. The holotype and only known specimen consists of a skeleton, which lacks most of the dermal skull bones, a large number of cervical vertebrae and distal limb elements. Gronausaurus wegneri is unique in having distinct cavities, the subdiapophyseal fossae, below the transverse processes of the pectoral and anterior dorsal vertebrae, that probably stabilised the bones against tensile forces of the rotator and levator muscles in the living animal. 相似文献
3.
Hungarosaurus tormai is a medium-sized nodosaurid ankylosaur that was described on the basis of four partial skeletons from the Santonian (Upper
Cretaceous) of Hungary. In this paper, a new fifth skeleton and several isolated remains are described which greatly improve
our knowledge of this primitive nodosaurid ankylosaur. Isolated cranial remains referred to juvenile individuals provide new
information on the development of cranial ornamentation in nodosaurid ankylosaurs. Apart from both preserved mandibles with
in situ dentition, the fifth partial skeleton contains several previously unknown limb elements (humerus, ulnae, radius) that
indicate unusual limb proportions for Hungarosaurus compared with other ankylosaurs. On the basis of the five partial skeletons and the isolated remains, a skeletal and dermal
armor reconstruction is attempted. Body mass calculations using three different methods yield an estimate of 650 kg for H. tormai.
相似文献
4.
Peter M. Galton 《Geobios》1980,13(3):451-457
The holotype of the nodosaurid ankylosaur Dracopelta zbyszewskii n. gen. and n. sp. is described from the Kimmeridgian(Upper Jurassic) of Ribomar on the west coast of Portugal. This is the first Upper Jurassic ankylosaur to be described that is represented by articulated bones. The specimen consists of a partial rib cage with thirteen dorsal vertebrae and five different types of dermal armor, two of wich show a partial overlap between adjacent plates. 相似文献
5.
Andrzej Ko?aczyński 《ZooKeys》2015,(522):141-152
A new species of Metacyclops is described from hyporheic waters and small rock depression with leaf litter in North Vietnam, the Tam Đao Mountains). Metacyclops
amicitiae
sp. n. can be distinguished from its congeners by the unique combination of the following characters: 12-segmented antennule, distal segment of P4 endopodite bearing a single apical spine, and the surface ornamentation of the intercoxal sclerites in P1–P4 (pilose on the distal margin of P1-P4 and spinulose on the caudal surface of P4). The latter character separates the new Metacyclops from its closest relative, Metacyclops
ryukyuensis, known only from the Ryukyu Islands (Ishigaki). The genus Metacyclops with the new species described herein is also for the first time recorded from Vietnam. An identification key is provided to the south and east Asian species of the genus. 相似文献
6.
James I. Kirkland Luis Alcalá Mark A. Loewen Eduardo Espílez Luis Mampel Jelle P. Wiersma 《PloS one》2013,8(12)
Nodosaurids are poorly known from the Lower Cretaceous of Europe. Two associated ankylosaur skeletons excavated from the lower Albian carbonaceous member of the Escucha Formation near Ariño in northeastern Teruel, Spain reveal nearly all the diagnostic recognized character that define nodosaurid ankylosaurs. These new specimens comprise a new genus and species of nodosaurid ankylosaur and represent the single most complete taxon of ankylosaur from the Cretaceous of Europe. These two specimens were examined and compared to all other known ankylosaurs. Comparisons of these specimens document that Europelta carbonensis n. gen., n. sp. is a nodosaur and is the sister taxon to the Late Cretaceous nodosaurids Anoplosaurus, Hungarosaurus, and Struthiosaurus, defining a monophyletic clade of European nodosaurids– the Struthiosaurinae. 相似文献
7.
Pierre Donze 《Geobios》1975,8(3):185-190
Here is described a new Ostracode genus, the species of which lived, from the Middle Tithonian to Upper Valanginian, in subbathyal-bathyal conditions of the Tethys ≪Sea≫. The type-species, with two subspecies, T. chabrensis chabrensis and T. chabrensis inflata, come from the vicinity of Angles and Barret-le-Bas (Alpes de Haute-Provence), where the future parastratotype of Valanginian will be located. 相似文献
8.
A tall-spined ornithopod dinosaur from the Early Cretaceous of Salas de los Infantes (Burgos, Spain)
Xabier Pereda-Suberbiola José Ignacio Ruiz-Omeñaca Fidel Torcida Fernández-Baldor Michael W. Maisch Pedro Huerta Rubén Contreras Luis Ángel Izquierdo Diego Montero Huerta Víctor Urién Montero Jochen Welle 《Comptes Rendus Palevol》2011,10(7):551-558
A tall-spined ornithopod dinosaur from the Pinilla de los Moros Formation (Upper Hauterivian-Lower Barremian) of Salas de los Infantes (Burgos, Spain) is described. The material consists of seven associated axial remains, including five middle dorsal vertebrae, a fragmentary neural spine and a dorsal rib, from a single medium-sized individual. This material was previously referred to Iguanodon cf. fittoni. It is characterised by having a high dorsal neurapophysis that is approximately 4.5 times the height of the centrum. The elongation and vertical orientation of the dorsal neural spines allow it to be distinguished from other ornithopods from the Wealden of Europe, including Hypselospinus and Barilium from the Valanginian, and Iguanodon and Mantellisaurus from the Barremian-Aptian. The material is here referred to Iguanodontia indet. because it is so incomplete, but it is potentially a distinct taxon. Among the ornithopods, only Ouranosaurus and the hadrosaurid Hypacrosaurus possess higher dorsal neural spines. 相似文献
9.
C. Mourer-Chauviré 《Paleontological Journal》2013,47(11):1315-1322
The extinct genus Euronyctibius was described from a proximal part of humerus from an unknown locality in the Phosphorites du Quercy, France. New material referable to this genus shows that Euronyctibius is more closely related to the Steatornithidae than to the Nyctibiidae. It is here attributed to a stem group representative of the family Steatornithidae. The Recent Steatornithidae includes only the South American monospecific genus, Steatornis, but during the Paleogene this family was also present in North America as well as in Europe. 相似文献
10.
Christopher J. Duffin 《Geobios》1981,14(4):469-475
A fin spine previously described as ‘Myriacanthus paradoxus’ Agassiz from the Lower Lias (Lower Jurassic) of Lyme Regis, is allocated to the new genus and species Recurvacanthus uniserialis. The spine is unusual in possessing a single median row of four large, hook-like, downturned denticles on the distal part of the posterior wall. It is concluded that the unique specimen should be classified with the myriacanthoid chimaeriform holocephalans since it possesses a tubercular ornament on the lateral walls. 相似文献
11.
《Geobios》1988,21(5):645-650
A correlation between the biozonations of orbitolinidsand charophytes is established in the Lower Valanginian from the Polacos Formation (Maestrat basin, Castelló, east of Spain). This correlation is based on the presence of the charophyte association: Perimneste micrandra-Perimneste ancora (rare), Globator trochiliscoides (primitive), Embergerella stellata, Flabellochara harrisii and Porocharaceae in the levels underlaying and overlaying the banks with the orbitolinid Valdanchella miliani. This charophyte assemblage is similar to the flora of the “Olba zone” from Grambast (1974), which was hypothetically attributed to the Hauterivian.According to our correlation, the olba flora was atleast already existing in the Lower Valanginian. Provisionally, the biostratigraphic boundary between the Berriasian and the Valanginian can be characterized in the continental domain of Tethys by the disappearance of Globator nurrensis and the first appearance of Embergerella stellata. Uncertainty still exists in the chronostratigraphy of the charophyte biozonation during the Middle Valanginian to Upper Hauterivan time interval. 相似文献
12.
İbrahim Demirkale Argun A. Özak Alper Yanar Geoffrey Allan Boxshall 《Systematic parasitology》2014,89(1):23-32
A new species of caligid copepod, Caligus solea n. sp., is described from the common sole Solea solea (Linnaeus) caught off the north-eastern Mediterranean coast of Turkey. Both sexes of the parasite were collected from all over the upper body surface of its host. The new species belongs to the macarovi-group of species as established by Boxshall & Gurney (Bull Br Mus (Nat Hist) (Zool), 39:161–178, 1980), with which it shares the following four characters: (i) leg 4 with two-segmented exopod, distal segment carrying three apical spines but no lateral spine; (ii) distal exopodal segment of leg 1 with three plumose setae posteriorly plus four distal margin elements, spine 1 naked, spines 2 and 3 with accessory process and spine 4 about twice length of the others; (iii) females with one-segmented abdomen while males with two-segmented abdomen; (iv) male maxilliped with myxal process opposing the tip of the subchela. However, the new species differs from its congeners within the macarovi-group in the number of sensillae on each papilla on and around the postantennal process, and also in the absence of serrations along the distal margin of the maxilla. This is the twenty-eighth species of Caligus to be reported from the Mediterranean Sea. 相似文献
13.
Markus Poschmann 《Pal?ontologische Zeitschrift》2014,88(2):223-226
The holotype of the eurypterid Alkenopterus burglahrensis from the Lower Devonian (Siegenian) of the Westerwald area (Rhineland-Palatinate, SW Germany) is re-examined. In contrast to a previous concept, this species has flattened distal podomeres seven and eight and a movable flattened spine on the seventh podomere of the sixth prosomal appendage (podomere VI-7a). Based on the presence of such a slender paddle, A. burglahrensis has to be regarded as a basal ‘swimming eurypterid’ (Eurypterina) and is formally transferred here to the family Onychopterellidae, extending the stratigraphical range of this family into the Lower Devonian. 相似文献
14.
The recently extinct large-bodied New World monkey Protopithecus brasiliensis Lund 1836 was named based on a distal humerus and proximal femur found in the Lagoa Santa cave system in the southeastern Brazilian state of Minas Gerais. These bones are from an animal about twice the size of the largest extant platyrrhines. One hundred and seventy-five years later, a nearly complete skeleton was discovered in the Toca da Boa Vista caves in the neighboring state of Bahia and was allocated to the same taxon as it was the first platyrrhine fossil of comparable size found since the originals. Our detailed study of the equivalent elements, however, reveals important morphological differences that do not correspond to intraspecific variation as we know it in related platyrrhine taxa. The presence of both an expanded brachioradialis flange on the humerus and gluteal tuberosity on the femur of the Bahian skeleton distinguishes it from the Lagoa Santa fossil as well as from all other platyrrhines. Further cranial and postcranial evidence suggests a closer relationship of the former with the alouattine Alouatta, while the limited Lund material fits more comfortably with the ateline clade. Therefore, we propose to limit P. brasiliensis Lund to the distal humerus and proximal femur from Lagoa Santa and erect a new genus and species for the skeleton from Toca da Boa Vista. Cartelles coimbrafilhoi was a large-bodied frugivore with a relatively small brain and diverse locomotor repertoire including both suspension and climbing that expands the range of platyrrhine biodiversity beyond the dimensions of the living neotropical primates. 相似文献
15.
《Geobios》2020
The first evidence of an ankylosaur from the Late Jurassic Qigu Formation of the southern Junggar Basin (Xinjiang, northwestern China) is described, based on an isolated caudal vertebra that was discovered together with fragmentary remains of other dinosaurs, including stegosaurs, sauropods, and theropods. The caudal vertebra is characterized by the following features: (i) elliptical morphology of the centrum, being wider than high; (ii) short antero-posterior length of the centrum; (iii) pronounced transversely extending ventral groove; (iv) massive transverse process, that is longer than the centrum diameter; (v) transverse process meeting the centrum high at the dorsal half and at a relatively flat angle; (vi) transverse process making a broad contact with the neural arch without forming a proximo-dorsal projection; and (vii) notochordal prominence present in the centre of the anterior articular surface. The study specimen represents only the second record of an ankylosaur from the Jurassic of Asia — aside from the slightly older Tianchisaurus from the early Upper Jurassic Toutunhe Formation, equally from the Junggar Basin. It helps to fill a gap in our knowledge of the early evolution of these armoured dinosaurs. Additionally, this discovery highlights the potential of the southern Junggar Basin to yield a rich vertebrate fauna and thus to provide an important insight into Late Jurassic ecosystems of Central Asia. 相似文献
16.
M. A. Collins I. G. Priede P. M. Bagley 《Proceedings. Biological sciences / The Royal Society》1999,266(1432):2011
The activity of two scavenging deep-sea fishes occupying the same niche in overlapping depth zones were compared by in situ measurements of swimming speeds, tail-beat frequencies and by arrival time at baits. At 4800 m on the Porcupine Abyssal Plain, the grenadier Coryphaenoides (Nematonurus) armatus was the dominant scavenger, arriving at baits after 30 min, and swimming at relatively slow speeds of 0.17 body lengths (BL) sec-1. At 2500 m in the relatively food rich Porcupine Seabight both C. (N.) armatus and the blue-hake, Antimora rostrata, were attracted to bait, but A. rostrata was always the first to arrive and most of the bait was consumed before the C. (N.) armatus arrived. A. rostrata swam at mean speeds of 0.39 BL sec-1, similar to related shallow water species at equivalent temperatures. Observations on tail-beat frequency from video sequences confirmed the greater activity of A. rostrata. The data indicate that, given sufficient food supply, high pressure and low temperature do not limit activity levels of demersal deep-sea fishes. Low activity of C. (N.) armatus is an adaptation to poor food supply in the abyss, where these fishes dominate, but prevents it competing with the more active A. rostrata in shallower depths. 相似文献
17.
A new species, Bochianites (?) ambiguus sp. nov., is described from the Lower Berriasian of the Eastern Crimea. It is proposed that the name B. laevis Liu, 1988 be used instead of B. levis Arkadiev, 2008, as the former is a senior synonym and homonym. For the first time a species of the genus Leptoceras is described from the Upper Berriasian-Lower Valanginian of the former Soviet Union. Problems in the identification of heteromorph ammonites when they are partially preserved are discussed, and the geographical distribution and facial affinities of the heteromorph ammonite family Bochianitidae are considered. 相似文献
18.
《Comptes Rendus Palevol》2003,2(2):133-141
Contribution of the ostracods to the sequential interpretation of the Lower Cretaceous (Berriasian–Valanginian) of the Essaouira–Agadir Basin (Morocco). The analysis of the ostracod fauna from the Berriasian–Valanginian of the Essaouira–Agadir Basin (Morocco) allows us to make a narrow relationship between the sequential evolution (established on sedimentary, biostratigraphical and geochemical data) and the evolution of statistical parameters of ostracods. So, the number of individuals and the number of species present comparable fluctuations and follow perfectly the sequential evolution; classes of dominant and fortuitous frequency are the most meaningful, the specific renewal rate shows extremes values at the limits of sequences and at the basis of transgressive systems tracts. To cite this article: A. Rossi et al., C. R. Palevol 2 (2003) 133–141. 相似文献
19.
The partial skeleton of a young adult Geotrypus antiquus (de Blainville 1840) from the Upper Oligocene (MP 28) found in Enspel comprises the skull with both mandibles, distal ends of both scapulae, left clavicula, humeri, ulnae and radii of both sides, various elements of the hand, some vertebrae, ribs, and the left femur. For the first time, the previously postulated association between dentition and postcranial elements can be confirmed. The skeleton exhibits strong adaptations for a subterranean life, similar to modern fossorial moles. The humerus is wide with a large pectoral process. The wing-like greater and lesser tuberosities, teres tubercle, and distal epicondylus are clearly developed. The metacarpals and phalanges are broad and stout. There are several sesamoid bones in the broad digging hand, including a prepollex (os falciforme). The preserved bones allowed the forelimb of G. antiquus to be reconstructed. Previous finds of G. antiquus have mainly been from France, with a few specimens from Switzerland and southern Germany. The specimen from Enspel is the northernmost record. A cladistic analysis, based on the matrix of Sánchez-Villagra et al. (Cladistics 22:59?C88, 2006), confirms the basal position of Geotrypus within the Old World moles (Talpini). 相似文献
20.
I. G. Danilov E. M. Obraztsova E. A. Boitsova P. P. Skutschas 《Paleontological Journal》2018,52(2):188-200
Abstract—Morphology and histology of several fragmentary turtle specimens from the Middle Jurassic locality in the Berezovsk quarry (Krasnoyarsk Region, Russia) are described, including Testudines indet. 1 (costal VIII), Testudines indet. 2 (two ornamented shell fragments), and Testudines indet. 3 (distal part of a humerus), and also skeletal elements of Annemys sp. (Xinjiangchelyidae) represented by mass material in the same locality. It is shown that Testudines indet. 1 and 3 probably belong to one or two taxa of basal aquatic turtles, while Testudines indet. 2 is most likely an abnormal Annemys sp. The presumable presence of basal turtles in the Berezovsk Quarry Assemblage agrees with the fact that they are present in other Middle Jurassic turtle assemblages of Asia. 相似文献