[Most Recent Entries] [Calendar View]
Friday, August 16th, 2024
| Time | Event | ||||||||
| 2:12a | [PaleoIchthyology • 2024] Bunocephalus serranoi • First Fossil Record of Aspredinidae: A New Species from the late Miocene of northeastern Argentina
Abstract This study aims to describe a new fossil species of the extant aspredinid genus Bunocephalus. The new species is represented by a nearly complete skull and pectoral girdle coming from late Miocene Ituzaingó Formation beds of Paraná City, Entre Ríos Province, Argentina. The specimen constitutes the first fossil record for the genus and the family Aspredinidae. This finding demonstrates that large temporal and geographical gaps are still present in the fossil record of the South American continent, evidencing the lack of knowledge of the geographical and temporal distribution of many freshwater fish clades. Pisces, Ituzaingó Formation, Paraná City, Neogene, Siluriformes, Bunocephalus
Bunocephalus serranoi nov. sp. Sergio Bogan and Federico L. Agnolin. 2024. First Fossil Record of Aspredinidae: A New Species from the late Miocene of northeastern Argentina. Zootaxa. 5493(4); 392-400. DOI: doi.org/10.11646/zootaxa.5493.4.5 | ||||||||
| 4:48a | [Botany • 2024] Phyllanthus celatus (Phyllanthaceae) • A New Species hiding in the shades in an urban Atlantic Forest in Rio de Janeiro State, Brazil
Abstract A new and critically endangered species of Phyllanthus, endemic to the Parque Nacional da Tijuca in Rio de Janeiro State, Brazil, is described and illustrated here. Phyllanthus celatus is placed in Phyllanthus subgenus Phyllanthus section Phyllanthus subsection Phyllanthus. Morphologically it resembles P. augustinii, P. lobatus and P. niruri, but differs mainly by presenting reddish primary, secondary and intersecondary veins on the abaxial surface (vs absent in both species), and 5-lobed pistillate disc (vs entire only in P. augustinii and P. niruri). Of these, only P. lobatus has a lobed disc, but it differs in pistillate sepals light green (vs whitish or slightly pinkish), deeply 5-lobed pistillate glandular disc (vs 3–5-lobed), styles erect (vs curved), and geographic distribution restricted to the Southeast (vs South). The systematic position of this species and its morphological relationships with allies are discussed and field photographs, illustrations, a distribution map, preliminary conservation status, and taxonomic notes are provided. Eudicots, Malpighiales, neotropics, Phyllanthoideae, taxonomy
 Phyllanthus celatus J.C.R. Mendes, J.M.A. Braga & Fraga, sp. nov. Etymology:—The specific epithet is a Latin adjective meaning hidden away. It is allusive to the discovery of this species that stayed unknown for centuries in the shadows of the forest, in a place intensely explored by historic and current botanists. Jone Clebson Ribeiro Mendes, João Marcelo Alvarenga Braga, Claudio Nicoletti de Fraga, Mario Tomazello-Filho, Priscila Orlandini and Sarah Maria Athiê-Souza. 2024. A New Species of Phyllanthus (Phyllanthaceae) hiding in the shades in an urban Atlantic Forest in Rio de Janeiro State, Brazil. Phytotaxa. 660(3); 278-286. DOI: doi.org/10.11646/phytotaxa.660.3.5 Researchgate.net/publication/382488487_A_new_species_of_Phyllanthus_hiding_in_the_shades_in_an_urban_Atlant Researchgate.net/scientific-contribution   | ||||||||
| 3:37p | [Mollusca • 2024] Janbinmorpha gen. nov. • Reassessment and Phylogenetic Position of the overlooked limacoid Land Snail Trochomorpha sculpticarina Martens, 1883 (Eupulmonata: Ariophantidae), with the Description of A New Genus
Abstract The Malay Peninsula has traditionally been considered to harbour a diverse land-snail fauna, both in terms of a high species richness and a wide variety of conchological traits, especially within the limacoid land snails. A recent survey along the Malay Peninsula of southern Thailand discovered an overlooked limacoid taxon “Trochomorpha” sculpticarina Martens, 1883, previously assigned to genus Trochomorpha of the Trochomorphidae. This genus is herein described as Janbinmorpha gen. nov. based on comparative studies of shell morphology, external features, genital anatomy and radular morphology, as well as analyses of partial sequences of two mitochondrial markers, COI and 16S rRNA, and of one nuclear marker, 28S rRNA. This new genus is characterised by a combination of distinct morphological and anatomical features. The most distinguishing features are a depressed trochiform shell with a keeled last whorl, gametolytic organ without a duct, gametolytic sac with two lobes, and proximal epiphallus encircled with a thick sheath and attached by the penial retractor muscle. In addition, an analysis of the differentiation in mitochondrial and nuclear markers confirmed that this new genus, first recognised by morphology, is also genetically distinct. The molecular data also confirm that J. sculpticarina comb. nov. is a member of the Ariophantidae and has a close evolutionary relationship to Hemiplecta and Maelamaodiscus. Key Words: Helicarionoidea, land snails, Malay Peninsula, phylogeny, systematics, taxonomy Taxonomy and systematics Superfamily Helicarionoidea Bourguignat, 1877 Family Ariophantidae Godwin-Austen, 1883 Subfamily Ariophantinae Godwin-Austen, 1883
Janbinmorpha Pholyotha & Panha, gen. nov. Type species: Trochomorpha sculpticarina Martens, 1883; here designated. Diagnosis: Shell dextral, umbilicated, depressed, lenticular, ribbed, with keeled last whorl. Animal with three dorsal lobes; foot tripartite; caudal foss present; caudal horn very reduced. Genitalia having epiphallic caecum, flagellum and dart apparatus; proximal epiphallus encircled with thickened muscular epiphallic sheath; gametolytic organ without duct and gametolytic sac consisting of two bulbs. Radula with tricuspid central tooth; unicuspid or bicuspid lateral teeth; unicuspid marginal teeth. Distribution: Currently known only from the Malay Peninsula. Etymology: The name combines “Janbin” in reference to the shape of an unidentified flying object (UFO) in the Thai language, and similar to the shell shape of this new genus, and “morpha” in reference to the similarity of shell morphology between this new genus and the genus Trochomorpha. Janbinmorpha sculpticarina (Martens, 1883), comb. nov.
Arthit Pholyotha, Chirasak Sutcharit, Somsak Panha and Piyoros Tongkerd. 2024. Reassessment and Phylogenetic Position of the overlooked limacoid Land Snail Trochomorpha sculpticarina Martens, 1883 (Eupulmonata, Ariophantidae), with the Description of A New Genus. Zoosystematics and Evolution. 100(3): 1135-1154. DOI: doi.org/10.3897/zse.100.129455 |
| << Previous Day |
2024/08/16 [Calendar] |
Next Day >> |