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Monday, October 17th, 2022
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| 2:32a | [Ichthyology • 2022] Garra rezai • A New Species (Teleostei: Cyprinidae) from Two widely disjunct Areas in the Tigris Drainage
Abstract Garra rezai, new species, is described from the Chooman, a tributary of the Lesser Zab in Iran, and from headwaters of the Yanarsu, a tributary of the upper Tigris in Turkey. It is distinguished from its congeners in the Garra variabilis species group by having two pairs of barbels, a well-developed mental disc, 35–40 total scales along the lateral line, 15–19 scales along the predorsal midline, and 15–18 circumpeduncular scales. It is further characterised by having ten diagnostic nucleotide substitutions and the K2P genetic distances with the closest species i.e. G. klatti, G. kemali and G. variabilis as 11.9, 12.0, and 13.7%, respectively in the mtDNA COI barcode region. Keywords: Pisces, Freshwater fish, Taxonomy, Cytochrome oxidase I, Middle East.  Garra rezai, new species Hamed Mousavi-Sabet, Soheil Eagderi, Maryam Saemi-Komsari, Cüneyt Kaya and Jörg Freyhof. 2022. Garra rezai, A New Species from Two Widely Disjunct Areas in the Tigris Drainage (Teleostei: Cyprinidae). Zootaxa. 5195(5); 419-436. DOI: 10.11646/zootaxa.5195.5.2 Researchgate.net/publication/364327436_Garra_rezai_a_new_species_from_the_Tigris_drainage | ||||||
| 2:33a | [Botany • 2022] Hohenbergia ymboreorum (Bromeliaceae) • A New Green-flowered Bromeliad from Bahia, Brazil
Abstract The authors describe Hohenbergia ymboreorum, a new green-flowered species of Bromeliaceae from Bahia state. The new species was found growing in the municipality of Vitoria da Conquista as a terrestrial in a highland transitional area between Atlantic Forest and Caatinga vegetation. This new species is morphologically related to H. minor and H. augusta, but can be easily distinguished by its sparsely white-lanate inflorescence indument, longer and narrower leaves, smaller flowers, with golden-brown floral bracts not hiding the sepals, and the erect petals. Additionally, the conservation status and phenology are discussed, and a table for morphological comparison with the similar taxa is provided. Keywords: Bromelioideae, Hohenbergia augusta, Poales, Vitória da Conquista, Monocots
Hohenbergia ymboreorum E.H.Souza & B.P.Cavalcante sp. nov. Brayan Paiva Cavalcante, Lidyanne Yuriko Saleme Aona and Everton Hilo de Souza. 2022. Hohenbergia ymboreorum (Bromeliaceae): A New Green-flowered Bromeliad from Bahia, Brazil. Phytotaxa. 567(3); 278-286. DOI: 10.11646/phytotaxa.567.3.7 | ||||||
| 9:32a | [PaleoMammalogy • 2022] Pangurban egiae • An early Nimravid from California and the Rise of Hypercarnivorous Mammals after the middle Eocene Climatic Optimum
Abstract Carnivoraforms (crown carnivorans and their closest relatives) first occupied hypercarnivorous niches near the dawn of the late Eocene, 40–37 Ma. This followed the decline or extinction of earlier carnivorous groups, Mesonychia and Oxyaenodonta, leaving carnivoraforms and hyaenodontan meat-eaters as high trophic level consumers. The pattern of this change and the relative contributions of the taxonomic groups has hitherto been unclear. We report a new genus and species of the sabretoothed mammalian carnivore family Nimravidae, Pangurban egiae, from the Eocene Pomerado Conglomerate of southern California, with strongly derived hypercarnivorous features. While geochronologically the oldest named nimravid in North America, Pangurban egiae is recovered as phylogenetically derived, with affinities to Hoplophoneus. This provides unequivocal evidence for rapid radiation and spread of nimravid carnivores across Asia and North America and constrains the timing of early divergences within the family. Pangurban egiae narrows the gap between convergent iterations of sabretoothed mammalian carnivores and demonstrates swift diversification of the hypercarnivorous nimravids during a period of global climatic instability. Furthermore, it highlights the top-to-bottom restructuring North American ecosystems underwent during the Eocene–Oligocene transition, resulting in carnivoraforms taking positions as trophic specialists for the first time, a niche they still occupy today. Keywords: evolution, sabretooth, Hoplophoneus, Eocene–Oligocene biotic transition, Duchesnean, carnassial  Systematic palaeontology Class MAMMALIA sensu Rowe [1988] unranked clade CARNIVORAMORPHA sensu Bryant [1996] (amended from Wyss & Flynn [1993]) unranked clade CARNIVORAFORMES Flynn, Finarelli & Spaulding [2010] Family NIMRAVIDAE sensu Bryant [1996] Pangurban egiae gen. et sp. nov. Type locality and horizon. SDSNH Locality 4042 (Spring Canyon Site 2). Upper member of Pomerado Conglomerate, San Diego, CA, USA, here considered middle to late Duchesnean in age (ca 40–37 Ma; see electronic supplementary material, text). Diagnosis. Anterior cutting edge of P4 expressed as sharp and distinct preparacristal blade, not reaching apex of paracone; anterior face of P4 flattened and nearly vertical giving the paracone a steep angle. Differs from: Maofelis and MA-PHQ 348 (undet. nimravid specimen housed at Muséum d'Histoire Naturelle Victor Brun, Montauban, France) in infraorbital foramen posterior to P3, double-rooted P3, P3 width to length ratio 0.4–0.65; Maofelis, MA-PHQ 348, and ‘nimravines’ of which includes barbourofelins, in reduced or absent P4 protocone, P4 metastylar blade length to paracone length ratio of 1.0–1.3, P3 crown height 48–70% that of P4; hoplophoneins (Hoplophoneus, Eusmilus and Nanosmilus) in the absence of parastyle on P4. Etymology. The generic name is from the Old Irish, in reference to the cat in the 9th century CE poem of the same name, whose hunting is likened to the academic pursuit of truth. The species name honours the contribution of palaeontologist Naoko Egi to the study of terrestrial carnivore evolution on both sides of the northern Pacific Ocean, mirroring the nimravid distribution. Ashley W. Poust, Paul Z. Barrett and Susumu Tomiya. 2022. An early Nimravid from California and the Rise of Hypercarnivorous Mammals after the middle Eocene Climatic Optimum. Biol. Lett.18; 20220291. DOI: 10.1098/rsbl.2022.0291 新種の化石肉食哺乳類の発見 An early nimravid from California and the rise of hypercarnivorous mammals after the Middle Eocene Climatic Optimum  |
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