Sunosuchus junggarensis sp.nov. (Archosauria: Crocodyliformes) from the Upper Jurassic of Xinjiang, People's Republic of China

1996 ◽  
Vol 33 (4) ◽  
pp. 606-630 ◽  
Author(s):  
Xiao-Chun Wu ◽  
Donald B. Brinkman ◽  
Anthony P. Russell
Keyword(s):  
New Species ◽  
Dorsal Surface ◽  
Junggar Basin ◽  
Northwest China ◽  
Upper Jurassic ◽  
Monophyletic Group ◽  
Ontogenetic Variation ◽  
Mandibular Symphysis ◽  
Republic Of China ◽  
A New Species

A new species of Crocodyliformes, Sunosuchus junggarensis, is established on the basis of six individuals from the Upper Jurassic of the Junggar Basin, Xinjiang, northwest China. It differs from other species of Sunosuchus primarily in having a dorsoventrally depressed supraoccipital that, in occipital view, lacks a median crest; a frontal that is ridged anteriorly; a distinct depression distal to the foramen aëreum on the dorsal surface of the quadrate; and an elongate, undivided maxillary depression. Cranial ontogenetic variation in S. junggarensis is discussed. Sunosuchus is probably a goniopholidid crocodyliform. It is distinguished from other genera of the Goniopholididae by a narrow and elongate snout, a small skull table, a partially ridged frontal, a pair of anteriorly located anterior palatal fenestrae, a lateroventrally–mediodorsally expanded retroarticular process, some enlarged pits on the frontal, and an elongate mandibular symphysis, with the splenial forming a small part of it. Sunosuchus, Eutretauranosuchus, and some species of Goniopholis may form a monophyletic group within the Mesoeucrocodylia.

A newPliosaurusspecies (Sauropterygia, Plesiosauria) from the Upper Jurassic of Patagonia: new insights on the Tithonian morphological disparity of mandibular symphyseal morphology

2018 ◽  
Vol 92 (2) ◽  
pp. 240-253 ◽  
Author(s):  
José P. O’Gorman ◽  
Zulma Gasparini ◽  
Luis A. Spalletti
Keyword(s):  
New Species ◽  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Upper Jurassic ◽  
Occipital Condyle ◽  
Mandibular Symphysis ◽  
Morphological Disparity ◽  
Vaca Muerta ◽  
Vaca Muerta Formation ◽  
A New Species

AbstractMost species of the genusPliosaurusOwen, 1842 come from the Northern Hemisphere, however, a growing number of new specimens are now available from the Southern Hemisphere. Here, a new species ofPliosaurusis described, the second for the genus from the Southern Hemisphere, collected from the upper Tithonian (Jurassic) levels of the Vaca Muerta Formation, Neuquén Province, Patagonia.Pliosaurus almanzaensisnew species is characterized by two autapomophies: the angular participating in the mandibular symphysis and the occipital condyle without a notochordal pit or several, irregularly arranged grooves. Additionally,P.almanzaensisn. sp. can be differentiated from otherPliosaurusspecies by the following characters: trihedral teeth, nine or more symphyseal alveoli, 15–17 post-symphyseal alveoli, and the parasphenoid without a ventral keel.Pliosaurus almanzaensisn. sp. shows thatPliosaurusspecies with nine or more symphyseal alveoli persisted until the late Tithonian, contrary to previous assumptions that only species with six symphyseal alveoli were present.

A New Species of Gracixalus (Anura: Rhacophoridae) from Northern Vietnam

2021 ◽  
Vol 28 (3) ◽  
pp. 111-122
Author(s):  
Dzung Trung Le ◽  
Yen Thi Do ◽  
Tung Thanh Tran ◽  
Truong Quang Nguyen ◽  
Nikolai L. Orlov ◽  
...  
Keyword(s):  
New Species ◽  
Tropical Forest ◽  
Central Region ◽  
Lateral Surface ◽  
Dorsal Surface ◽  
Upper Eyelid ◽  
Morphological Differences ◽  
Montane Tropical Forest ◽  
Ventral Skin ◽  
A New Species

A new species of Gracixalus is described from northwestern Vietnam based on morphological differences and molecular divergence. Morphologically, the new species, Gracixalus ziegleri sp. nov., is distinguishable from its congeners on the basis of a combination of the following diagnostic characters: (1) size small (SVL 28.1 – 30.5 mm); (2) head slightly wider than long; (3) vomerine teeth absent; (4) upper eyelid and dorsum without spine; (5) supratympanic fold distinct; (6) skin of dorsal and lateral surface of head, body and limbs rough, sparsely scattered with tubercles; (7) ventral skin granular; (8) tibiotarsal projection absent; (9) toes with moderately developed webbing, formula I1 – 11/2 II1 – 2III1 – 2IV2 – 1V; (10) dorsal surface of head and body brown to beige above, with an inverse Y-shaped dark brown marking, extending from interorbital region to central region of dorsum; (11) external vocal sac absent in males; (12) males with a nuptial pad on finger I. Phylogeneticially, the new species is a sister taxon of Gracixalus sapaensis and G. tianlinensis with well-supported values. Currently, the new species is known only from the evergreen montane tropical forest of Yen Bai Province at an elevation of ca. 2200 m a.s.l.

A new species of Psammophis (Serpentes: Psammophiidae) from the Turpan Basin in northwest China

Zootaxa ◽  
2021 ◽  
Vol 4974 (1) ◽  
pp. 116-134
Author(s):  
MINLI CHEN ◽  
JINLONG LIU ◽  
BO CAI ◽  
JUN LI ◽  
NA WU ◽  
...  
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Northwest China ◽  
Genetic Differences ◽  
Cytb Gene ◽  
Turpan Basin ◽  
Morphological Differences ◽  
A New Species

An adult sand snake specimen was collected during a herpetofaunal survey conducted in the Turpan Basin in northwest China. Phylogenetic analyses revealed that this specimen, along with other snake sloughs and skins collected from different localities in the Turpan Basin formed a clade that is sister to Psammophis lineolatus. This taxon exhibited substantial divergence from its congeners (P. lineolatus and P. condanarus) with uncorrelated p-distances ranging from 11.9 ± 0.9% to 15.8 ± 1.6% for the ND4 gene and from 10.2 ± 0.8% to 13.8 ± 1.1% for the Cytb gene. Given the genetic differences along with morphological differences, we describe the specimen from the Turpan Basin as Psammophis turpanensis sp. nov. We provide detailed morphological descriptions, and compare this specimen with five Asian sand snakes and the Afro-Asian Sand Snake, P. schokari. In addition, we provide brief comments on the biogeography of Psammophis in China. 

scholarly journals A new species of Pimelodus La Cépède, 1803 (Siluriformes: Pimelodidae) from rio Ribeira de Iguape basin, Brazil

2011 ◽  
Vol 9 (1) ◽  
pp. 127-134 ◽  
Author(s):  
Frank Raynner V Ribeiro ◽  
Carlos Alberto S. de Lucena ◽  
Osvaldo T Oyakawa
Keyword(s):  
New Species ◽  
Dorsal Surface ◽  
Branchial Arch ◽  
The Other ◽  
Gill Rakers ◽  
Caudal Fin ◽  
Fin Rays ◽  
A New Species ◽  
Pelvic Fin

Pimelodus multicratifer, a new species, is described from the rio Ribeira de Iguape basin. The new species differs from the other Pimelodus species by the following features: 26 to 30 gill rakers on the first branchial arch; a combination of three to six rows of dark spots regularly or irregularly scattered on the flanks and several small dark spots irregularly scattered on the dorsal surface of head, supraoccipital process, and sometimes on the dorsal and caudal fins; striated lips; maxillary barbels reaching between posterior tip of the pelvic-fin rays and posterior tip of the middle caudal-fin rays.

A revision of the rare genusCyclolampas(Echinoidea) using morphometrics with description of a new species from the upper Callovian of Burgundy (France)

2013 ◽  
Vol 87 (1) ◽  
pp. 105-122 ◽  
Author(s):  
Thomas Saucede ◽  
Alain Bonnot ◽  
Didier Marchand ◽  
Philippe Courville
Keyword(s):  
New Species ◽  
Upper Jurassic ◽  
Systematic Position ◽  
Linear Measurements ◽  
Systematic Revision ◽  
Fourier Shape Analysis ◽  
And Migration ◽  
A New Species ◽  
Upper Callovian ◽  
Test Shape

The discovery of a new species,Cyclolampas altusnew species in the upper Callovian of Burgundy (France) leads to the systematic revision of the rare echinoid genusCyclolampasPomel, 1883. Two morphometric approaches are used jointly to describe and quantify variations in test shape: the analysis of linear measurements and the Elliptic Fourier shape analysis. Both analyses yield congruent results that highlight the amplitude of within-species variations and quantify the part due to allometry. Along with the description ofC. altus, the systematic position of species formerly assigned to the generaPygorhytisPomel, 1883 andCyclolampasis amended. Previously attributed to the genusPygorhytis,Cyclolampas castanea(Desor, 1858) is reassigned to the genusCyclolampason the base of new observations. Conversely, the examination of the Bajocian speciesPygorhytis kiliani(Lambert, 1909) andPygorhytis gillieroniDesor in Desor and de Loriol, 1872, which were previously assigned toCyclolampasnow supports their taxonomic reassignment to the genusPygorhytis. Finally, the two speciesCyclolampas verneuili(Cotteau, 1870) andCyclolampas cotteauiMintz, 1966 (nomen nudum) are considered junior synonyms of the genus type speciesCyclolampas voltzii(Agassiz, 1839). The questioned origin date of the genus, estimated either to the Bajocian or to the Oxfordian, is now clearly established to be upper Callovian. These new results fit well with the overall scheme of atelostomate echinoid evolution and migration to deep-sea environments during the Middle and Upper Jurassic.

scholarly journals Cranial anatomy of Allosaurus jimmadseni, a new species from the lower part of the Morrison Formation (Upper Jurassic) of Western North America

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e7803 ◽  
Author(s):  
Daniel J. Chure ◽  
Mark A. Loewen
Keyword(s):  
New Species ◽  
North America ◽  
Phylogenetic Analyses ◽  
Upper Jurassic ◽  
Morrison Formation ◽  
Ventral Margin ◽  
Western North America ◽  
Theropod Dinosaur ◽  
Theropod Dinosaurs ◽  
A New Species

Allosaurus is one of the best known theropod dinosaurs from the Jurassic and a crucial taxon in phylogenetic analyses. On the basis of an in-depth, firsthand study of the bulk of Allosaurus specimens housed in North American institutions, we describe here a new theropod dinosaur from the Upper Jurassic Morrison Formation of Western North America, Allosaurus jimmadseni sp. nov., based upon a remarkably complete articulated skeleton and skull and a second specimen with an articulated skull and associated skeleton. The present study also assigns several other specimens to this new species, Allosaurus jimmadseni, which is characterized by a number of autapomorphies present on the dermal skull roof and additional characters present in the postcrania. In particular, whereas the ventral margin of the jugal of Allosaurus fragilis has pronounced sigmoidal convexity, the ventral margin is virtually straight in Allosaurus jimmadseni. The paired nasals of Allosaurus jimmadseni possess bilateral, blade-like crests along the lateral margin, forming a pronounced nasolacrimal crest that is absent in Allosaurus fragilis.

A new cutthroat eel of the genus Synaphobranchus (Anguilliformes: Synaphobranchidae) from Taiwan

Zootaxa ◽  
2018 ◽  
Vol 4454 (1) ◽  
pp. 68
Author(s):  
HSUAN-CHING HO ◽  
WEI-CHUN HONG ◽  
HONG-MING CHEN
Keyword(s):  
New Species ◽  
Dorsal Surface ◽  
Type Specimens ◽  
Dorsal Fin ◽  
A New Species

A new species of the cutthroat eel genus Synaphobranchus is described from Taiwan on the basis of 12 types and 11 non-type specimens. The new species can be distinguished from its congeners in having most of its head and abdomen naked, except for a patch of scales behind the eye, dorsal surface of trunk naked or covered by scattered scales; scales oval in shape; dorsal fin slightly before to about opposite to origin of anal fin; mean vertebral formula 28-28-131, precaudal vertebrae 50–56, total vertebrae 124–135. Comments of the congeners occurred in adjacent regions are provided.

Memoirs: The Loxosomatidae of the Plymouth Area, including L. obesum sp. nov

1932 ◽  
Vol s2-75 (298) ◽  
pp. 321-391
Author(s):  
DAPHNE ATKINS
Keyword(s):  
New Species ◽  
Small Group ◽  
Average Length ◽  
Dorsal Surface ◽  
Valid Species ◽  
Sense Organs ◽  
Small Disc ◽  
Longitudinal Muscles ◽  
Sexually Mature ◽  
A New Species

Four known species of Loxosoma, namely, L. phascolosomatum Vogt, L. crassicauda Salensky, L. singulare Keferstein, and L. claviforme Hincks, and a new species L. obesum are found in the Plymouth region, and are described. L. phascolosomatum is found on Phascolosoma vulgare, and in addition on two molluscs, Lepton clarkiae and Mysella bidentata from the burrows of Phascolosoma (pellucidum) elongatum from the Salcombe Estuary. L. crassicauda lives in the tanks in the Laboratory. Its average length is 1.4 mm. Between March 1929 and February 1930 males only were found: no ova were seen. L. singulare.--Occurs on Aphrodite aculeata; it varies between 0.18 and 0.8 mm. in length. In females carrying embryos the vestibule has two diverticula, one on either side of the rectum. L. claviforme.--It is considered a valid species, and may be distinguished from L. singulare by: (1) its greater size and length of stalk, (2) greater number of tentacles (commonly twelve), (3) position of the budding zone, and (4) the presence of paired sense-organs. Its average length is about 0.8 mm. It occurs on Hermione hystrix. A small group of Loxosoma, found on Aphrodite aculeata, were intermediate in form between L. singulare and L. claviforme, and were peculiar in retaining a number of their buds. The sex of such buds in several instances differed from that of the parent. L. obesum sp. nov. is found on the dorsal surface of Aphrodite aculeata. It may reach a length of 2.4 mm.; average individuals are rather more than 1.0 mm. in length. The lophophore is small, and bears almost invariably eight tentacles. Longitudinal muscles only are present in the stalk, which ends in a small disc of attachment. A foot-gland is present in the bud, and is frequently preserved as a vestige in the adult. The buds are near the lophophore, and may be as many as six on either side. The larva resembles that of L. singulare. Two main forms may be distinguished, differing in shape of the calyx and development of the stomach. The ovary may contain six well-developed ova on either side, and the vestibule twenty-six embryos. With one exception, females greatly exceeded males in number, and it is probable that the male becomes sexually mature at a smaller size than does the female.

New species of Pycnogonum (Pycnogonida: Pycnogonidae) from Green Island, Taiwan, with an additional note on the holotype of P. spatium

Zootaxa ◽  
2020 ◽  
Vol 4750 (1) ◽  
pp. 122-130
Author(s):  
DAMIN LEE ◽  
WON KIM
Keyword(s):  
New Species ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Type Locality ◽  
Present Species ◽  
Shallow Waters ◽  
University Museum ◽  
Green Island ◽  
A New Species ◽  
Dorsal Tubercle

We report the discovery of a new species of the genus Pycnogonum Brünnich, 1764 found in the shallow waters of Green Island, Taiwan. Pycnogonum (Nulloviger) granulatum sp. nov. is characterized by the presence of the granular integument, a dorsal tubercle on the proboscis, the transverse ridges on the dorsal surface of the trunk, and the spines on the ventral surface of the tibia, tarsus, and propodus having cleft tips. Because the male gonopores are present and ovigers are absent, the present species belongs to the subgenus Nulloviger. The present species has been compared with P. (N.) moolenbeeki Stock, 1992, P. (N.) lobipes Stock, 1991, P. (N.) tuberculatum Clark, 1963, P. nodulosum Döhrn, 1881, and P. spatium Takahashi, Dick & Mawatari, 2007. Among the congeners, P. spatium is geographically the closest congener, of which type locality is Amami Island, Japan. The holotype of P. spatium was loaned from Hokkaido University Museum (ICHUM) and re–examined. To determine the exact gender of the holotype of P. spatium, additional investigations of the coxal pellicula and gonopores are required. 

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