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Saturday, January 27th, 2024
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| 2:58a | [Crustacea • 2023] Glyptothoa sagara • A Fish Parasitic Deep-Sea Cymothoid (Isopoda) from the Indian Ocean
Glyptothoa sagara gen. and sp. nov. is described from the host fish Glyptophidium macropus Alcock, 1894 (Ophidiidae), at depths 300 to 650 metres from the southwest coast of India. The mitochondrial cytochrome c oxidase subunit I (COI) gene of the species was sequenced and compared with other closely related branchial cymothoid genera. Both morphological and molecular data corroborate the inclusion of this parasitic isopod as a new genus, and we describe Glyptothoa sagara gen. and sp. nov. The following combinations of characters characterise the genus: cephalon immersed in pereonite 1; dorsum vaulted; all coxae visible in dorsal view; coxae shorter than or as long as pereonites; pereonites 4–7 slightly decrease in width towards one side, slightly asymmetrical, lateral margins slightly constricted, in hunched side; relatively wide pleon, with large lateral gaps between pleonites; antennula narrowly separated by rostrum, slender, shorter than antenna; antenna with 13 articles, buccal cone obscuring antennal bases; brood pouch arising from coxae 1–4, 6; oostegite 1 bilobed; pleopods rami all simple, without proximomedial lamellar lobe, without folds or thickened ridges. The adult life stages, such as females (ovigerous and non-ovigerous), males and transitional stage of the new species are described. The species is currently known only from the type locality and the type host. The ecological remarks of the newly described taxon are also provided. The following species are transferred from Elthusa Schioedte and Meinert, 1884: Glyptothoa myripristae (Bruce, 1990) comb. nov., Glyptothoa propinqua (Richardson, 1904) comb. nov. and Glyptothoa caudata (Schioedte and Meinert, 1884) comb. nov. Key words: Marine fish parasite, Branchial cavity, Cytochrome c oxidase subunit I, Cymothoidae, New genus, Indian Ocean, Phylogeny  TAXONOMY Suborder Cymothoida Wägele, 1989 Superfamily Cymothooidea Leach, 1814 Family Cymothoidae Leach, 1814 Genus Glyptothoa gen. nov. Type species: Glyptothoa sagara sp. nov.; original designation. Etymology: The new generic name is the abbreviation of the host genus name (Glyptophidium) – “Glypto” combined with the ending – thoa indicating the family affinity. Gender is feminine. Diagnosis: Ovigerous female (bold = key features): Body dorsally vaulted, two times as long as wide, widest at pereonite 3. Cephalon partially immersed in pereonite 1, anterior margin with acute ventrally directed rostral point. Pereonites 2–7 coxae visible in dorsal view, all coxae shorter than pereonite; pereonites 4–7 slightly asymmetrical, lateral margins slightly constricted, in hunched side. Pereonites 4–7 slightly decrease in width towards one side. Pleon short, c. 15% BL, pleonites all visible, ... Species included: Glyptothoa sagara sp. nov.; Glyptothoa propinqua (Richardson, 1904) comb. nov., Glyptothoa myripristae (Bruce, 1990) comb. nov., and Glyptothoa caudata (Schioedte and Meinert, 1884) comb. nov. Glyptothoa sagara sp. nov. Etymology: The specific name is derived from the Sanskrit word “sagara”, literally meaning the “gathering together of waters,” i.e., the ocean. Further, it is a reminder of the importance of the ocean for the sustainable development of life underwater and its conservation.  Ameri Kottarathil Helna, Panakkool Thamban Aneesh, Appukuttannair Biju Kumar and Susumu Ohtsuka. 2023. Glyptothoa gen. nov., A Fish Parasitic Deep-Sea Cymothoid (Crustacea: Isopoda) from the Indian Ocean, with Four Species, Including One New Species. Zool Stud. 62:51. DOI: 10.6620/ZS.2023.62-51  | ||||
| 3:03a | [Botany • 2024] Blakea eden, B. pavida, B. quinta, B. yumi, etc. (Melastomataceae: Pyxidantheae) • Taxonomic and Chorological Novelties in Blakea from Peru with A List of Species for the Country
Abstract Seven new Peruvian species of Blakea are described and illustrated here: Blakea eden, Blakea quinta, Blakea wilderi and Blakea yumi from the Department of Amazonas, Blakea pavida and Blakea rojasiae from the Departments of Amazonas and Cajamarca, and Blakea leoniae from the Departments of Amazonas and San Martin. Following IUCN criteria, we propose that most species should be considered as Endangered (EN) but for B. pavida, B. quinta and B. yumi, that should be recognized as Critically Endangered (CR) due to their restricted distributions and the intense ongoing human activity (agriculture and livestock) in their habitats. Additionally, we provide notes on the new records and species that have been published since Brako & Zarucchi’s checklist of the Peruvian flora in 1993, including the lectotypifications of Blakea brasiliensis, B. nareliana, and Topobea pittieri (B. henripittierii). Blakea gracilis and B. parvifolia are suggested to be excluded from Peru. Based on this, we present a list of 33 Blakea species currently accepted for Peru, 14 of which are endemic. Amazonas, Andean forests, Cajamarca, Myrtales, neotropics, new species, San Martín, systematics, Topobea, Eudicots
Robin Fernandez-Hilario, Luis Pillaca-Huacre, Rosa Villanueva-Espinoza, Sebastián Riva-Regalado, Rocio del Pilar Rojas Gonzáles, Renato Goldenberg and Fabián A. Michelangeli. 2024. Taxonomic and Chorological Novelties in Blakea (Melastomataceae: Pyxidantheae) from Peru with A List of Species for the Country. Phytotaxa. 635(1); 1-42. DOI: 10.11646/phytotaxa.635.1.1   | ||||
| 3:12a | [PaleoEntomology • 2024] Eunotalia emeryi, Cretotettigarcta shcherbakovi & Pranwanna xiai • Mesozoic Evolution of Cicadas and their Origins of Vocalization and Root Feeding
Abstract Extant cicada (Hemiptera: Cicadoidea) includes widely distributed Cicadidae and relictual Tettigarctidae, with fossils ascribed to these two groups based on several distinct, minimally varying morphological differences that define their extant counterparts. However, directly assigning Mesozoic fossils to modern taxa may overlook the role of unique and transitional features provided by fossils in tracking their early evolutionary paths. Here, based on adult and nymphal fossils from mid-Cretaceous Kachin amber of Myanmar, we explore the phylogenetic relationships and morphological disparities of fossil and extant cicadoids. Our results suggest that Cicadidae and Tettigarctidae might have diverged at or by the Middle Jurassic, with morphological evolution possibly shaped by host plant changes. The discovery of tymbal structures and anatomical analysis of adult fossils indicate that mid-Cretaceous cicadas were silent as modern Tettigarctidae or could have produced faint tymbal-related sounds. The discovery of final-instar nymphal and exuviae cicadoid fossils with fossorial forelegs and piercing-sucking mouthparts indicates that they had most likely adopted a subterranean lifestyle by the mid-Cretaceous, occupying the ecological niche of underground feeding on root. Our study traces the morphological, behavioral, and ecological evolution of Cicadoidea from the Mesozoic, emphasizing their adaptive traits and interactions with their living environments.
Stem cicadoids Eunotalia gen. nov. Eunotalia emeryi sp. nov. Etymology: The generic name is a compound form, from Classical Greek prefix: eu-, meaning ‘true’ or ‘good’, and notos, meaning ‘back’ or ‘dorsum’. Stem cicadids Cretotettigarcta Cretotettigarcta problematica comb. nov. Cretotettigarcta shcherbakovi sp. nov. Pranwanna gen. nov Pranwanna xiai sp. nov. Etymology: The generic name, pranwanna, is from the Jingpho language spoken in Kachin State of Myanmar, meaning ‘primitive’. Hui Jiang, Jacek Szwedo, Conrad C. Labandeira, Jun Chen, Maxwell S. Moulds, Bastian Mähler, A. Drew Muscente, De Zhuo, Thet Tin Nyunt, Haichun Zhang, Cong Wei, Jes Rust and Bo Wang. 2024. Mesozoic Evolution of Cicadas and their Origins of Vocalization and Root Feeding. Nature Communications. 15, 376. DOI: 10.1038/s41467-023-44446-x |
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