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Friday, February 15th, 2019
| Time | Event | ||||||||
| 9:38a | [Gastropoda • 2019] Diplommatina azlani • A New Land Snail Species (Cyclophoroidea: Diplommatinidae) from Sarawak
Abstract A new land snail species of the family Diplommatinidae from Sarawak is described. Diplommatina azlani, new species, can be distinguished from its congeners in Borneo by a suite of shell characters. It has a sinistral dark ruby red shell with inconspicuous oblique radial ribs, protoconch that is punctate with small pits, and constriction without parietalis and longitudinal palatalis. To date, it is known only from the type locality, Santubong, a recently gazetted national park in Sarawak, Malaysian Borneo. Key words. gastropoda, land snail, Malaysia, sinistral  
SYSTEMATICS Family Diplommatinidae Benson, 1849 Genus Diplommatina Benson, 1849 Diplommatina azlani, new species Cross diagnosis. The main shell characters differentiating Diplommatina azlani, new species, from other sinistral Bornean Diplommatina species are the lack of parietalis and longitudinal palatalis in the shell constriction, and its dark ruby red shell colour. In addition, this species differs from Diplommatina riedeli Maassen, 2007, Diplommatina mongondowensis Maassen, 2007, and Diplommatina soputensis Sarasin & Sarasin, 1899, from Sulawesi, and Diplommatina kakenca Nurinsiyah & Hausdorf, 2017, from Java by the lack of longitudinal palatalis in shell constriction and by the presence of inconspicuous radial ribs on the body whorl. This new species has more densely placed radial ribs compared to Diplommatina tardigrada Benthem-Jutting, 1959, Diplommatina strophosa Benthem-Jutting, 1959, and Diplommatina tweediei Laidlaw, 1949, from Sumatra, Diplommatina laidlawi Sykes, 1903 from Peninsular Malaysia, and Diplommatina busanensis Godwin-Austen, 1889 from Sarawak. ... Etymology. The specific epithet honours the zoologist Mohd. Azlan Jayasilan of Universiti Malaysia Sarawak (UNIMAS) for his contributions to Bornean wildlife conservation and his interest in ecological studies of the terrestrial snails of Sarawak. Geographic distribution and habitat. Diplommatina azlani, new species, is thus far known only from the type locality (Fig. 2). The animals were observed living among leaf litter and plant debris near a rocky stream in lowland mixed dipterocarp forest. Mohammad Effendi bin Marzuki. 2019. Diplommatina azlani, A New Land Snail Species from Sarawak (Gastropoda: Cyclophoroidea: Diplommatinidae). RAFFLES BULLETIN OF ZOOLOGY. 67; 56–59.  | ||||||||
| 1:49p | [Botany • 2019] Clematis mae (Ranunculaceae) • A New Species of Clematis sect. Meclatis from Xinjiang, China
Abstract Clematis mae Z.Z.Yang & L.Xie, a new species of Ranunculaceae from Xinjiang, China, is described and illustrated. The new species is morphologically similar to C. orientalis and C. glauca but can be distinguished for being a less hairy plant (hairy in C. orientalis), often 2-ternate leaves (1–2-pinnate for C. orientalis and C. glauca), lanceolate to linear-lanceolate leaflets (elliptic or ovate in C. glauca), larger flowers (smaller flower in C. orientalis) and narrowly lanceolate sepals with acute to slightly attenuate apex (narrowly oblong sepals in C. orientalis and ovate to broadly lanceolate sepals in C. glauca). The new species is endemic to the southern slope of North Tianshan Mountain in Central Xinjiang. The conservation status of the species is also discussed. Keywords: Anemoneae, Asia, Eudicots, Ranunculales, vine
Clematis mae Z.Z. Yang & L. Xie, sp. nov. Diagnosis: The new species is most similar to C. orientalis L. and C. glauca Willd. and it can be distinguished from the latter two species by the following combinations of characteristics. Plants of the new species are less hairy than C. orientalis and, in this respect, are similar to C. glauca. The leaves of the new species are often 2-ternate, with lanceolate to linear lanceolate leaflets. Its leaflets are larger than those of C. orientalis, but narrower than those of C. glauca. The flowers are also significantly larger than those of C. orientalis and slightly larger than those of C. glauca. The sepals of the new species are also less hairy than those of C. orientalis and similar to those of C. glauca. The shape of the sepal is lanceolate and the apex is acute to slightly attenuate. In C. orientalis, the sepals are often linear, oblong and reflexed. The sepals of C. glauca are often wider than those of the new species (Table 1, Fig. 3). ...
Distribution: Only known from its type locality, Yuer gou, Toksun, Xinjiang, China. Etymology: The species epithet is chosen in honour of the collector, Ms. Ma Ming, who first noticed this new species and guided the last author to collect specimens. Vernacular name: Ming Tie Xian Lian (明铁线莲; new Chinese name) Jian He, Ru-Dan Lyu, Min Yao, Lei Xie and Zong-Zong Yang. 2019. Clematis mae (Ranunculaceae), A New Species of Clematis sect. Meclatis from Xinjiang, China. PhytoKeys. 117: 133-142. DOI: 10.3897/phytokeys.117.31854 | ||||||||
| 2:00p | [Paleontology • 2019] Nhandumirim waldsangae • A New Dinosaur with Theropod Affinities from the Late Triassic Santa Maria Formation, South Brazil
ABSTRACT The Late Triassic (Carnian) upper Santa Maria Formation of south Brazil has yielded some of the oldest unequivocal records of dinosaurs. Here, we describe a new saurischian dinosaur from this formation, Nhandumirim waldsangae, gen. et sp. nov., based on a semiarticulated skeleton, including trunk, sacral, and caudal vertebrae, one chevron, right ilium, femur, partial tibia, fibula, and metatarsals II and IV, as well as ungual and non-ungual phalanges. The new taxon differs from all other Carnian dinosauromorphs through a unique combination of characters, some of which are autapomorphic: caudal centra with sharp longitudinal ventral keels; brevis fossa extending for less than three-quarters of the ventral surface of the postacetabular ala of the ilium; dorsolateral trochanter ending well distal to the level of the femoral head; distal part of the tibia with a mediolaterally extending tuberosity on its cranial surface and a tabular caudolateral flange; conspicuous, craniomedially oriented semicircular articular facet on the distal fibula; and a straight metatarsal IV. This clearly distinguishes Nhandumirim waldsangae from both Saturnalia tupiniquim and Staurikosaurus pricei, which were collected nearby and at a similar stratigraphic level. Despite not being fully grown, the differences between Nhandumirim waldsangae and those saurischians cannot be attributed to ontogeny. The phylogenetic position of Nhandumirim waldsangae suggests that it represents one of the earliest members of Theropoda. Nhandumirim waldsangae shows that some typical theropod characters were already present early in dinosaur evolution, and it represents possibly the oldest record of the group known in Brazil. 
 SYSTEMATIC PALEONTOLOGY DINOSAURIFORMES Novas, 1992, sensu Nesbitt, 2011 DINOSAURIA Owen, 1842, sensu Padian and May, 1993 SAURISCHIA Seeley, 1887, sensu Gauthier, 1986 cf. THEROPODA Marsh, 1881, sensu Gauthier, 1986 NHANDUMIRIM WALDSANGAE, gen. et sp. nov Etymology— The generic name combines the Portuguese derivatives of the indigenous Tupi-Guarani words ‘Nhandu’ (running bird, common rhea) and ‘Mirim’ (small), in reference to the size and inferred cursorial habits of the new dinosaur. The specific epithet name refers to the Waldsanga site, the historic outcrop (Langer, 2005a) that yielded this new species. Júlio C. A. Marsola, Jonathas S. Bittencourt, Richard J. Butler, Átila A. S. Da Rosa, Juliana M. Sayão and Max C. Langer. 2019. A New Dinosaur with Theropod Affinities from the Late Triassic Santa Maria Formation, South Brazil. Journal of Vertebrate Paleontology. e1531878 DOI: 10.1080/02724634.2018.1531878 Parente do tiranossauro viveu no Brasil há 233 milhões de anos jornal.usp.br/ciencias/ciencias-biologic |
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