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Sunday, June 30th, 2024
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| 2:07a | [Entomology • 2024] Spinanycta alabamensis • A New Genus and Species of nicoletiid Silverfish (Zygentoma: Nicoletiidae) from Caves of northern Alabama, USA
Abstract A new genus and species of troglobiotic nicoletiid (Insecta, Zygentoma, Nicoletiidae) is described from northern Alabama, USA. The type species was collected from three caves in the Highland Rim section of the Interior Low Plateau physiographic province on the northern side of the Tennessee River Valley. Morphological and genetic analysis using the mitochondrial 16S rRNA locus show that Spinanycta alabamensis sp. nov. is quite distinct from related nicoletiids in North America. The species differs from members of other genera by its urosternum I, which in males is modified with a central pointy extension. The new species significantly extends the distribution of cave-dwelling members of the family into the southeastern United States and suggests that additional nicoletiid diversity remains to be discovered from karst regions of the eastern United States. Keywords: Insect, Interior Low Plateau, subterranean, Thysanura, troglobite, troglobiont
Class Insecta Linnaeus, 1758 Order Zygentoma Börner, 1904 Suborder Neozygentoma Engel, 2006 Infraorder Euzygentoma Grimaldi & Engel, 2005 Family Nicoletiidae Escherich, 1905 Spinanycta Espinasa, Gutierrez & Niemiller, gen. nov. Spinanycta alabamensis Espinasa, Gutierrez & Niemiller, sp. nov. Diagnosis: An American nicoletiid with Urosterna II–VII subdivided into two coxites and one sternite. Urosterna I, VIII and IX of male entire. Coxites on segments II–IX with styli. Urosternum I of males modified with a central pointy extension. Urosternum VIII of male flat posteriorly, without emarginations or projections in between the styli of this segment. Paramera with a distal semi-eversible vesicle and short chaetae, their length being about 1/4 the width of the paramera. Subgenital plate of females subtriangular. Tergum X with one distinct macrochaetae on posterior angles. Cercus of male with sensory pegs (spines) and appendix dorsalis without sensory pegs. Etymology: Spinanycta. From spina = Greek for spine. It references the diagnostic spine in urosterum I, and nycta = Greek for night. It references in Greek mythology the occupation of caves by Nyx, the primordial goddess of night. Distribution: This genus is known from just three cave systems on the north side of the Tennessee River Valley in southern Madison and southeastern Limestone counties, Alabama, within the Highland Rim section of the Interior Low Plateau physiographic province (Fig. 1). Luis Espinasa, Abrianna Gutierrez, Amata Hinkle and Matthew L. Niemiller. 2024. A New Genus and Species of nicoletiid Silverfish (Insecta, Zygentoma, Nicoletiidae) from Caves of northern Alabama, USA. Subterranean Biology. 49: 1-17. DOI: 10.3897/subtbiol.49.119986 | ||||||
| 3:07a | [Mollusca • 2024] Cyerce nicholasi, C. piercei, ... • A Cryptic Radiation of Caribbean Sea Slugs revealed by Integrative Analysis: Cyerce ‘antillensis’ (Heterobranchia: Sacoglossa: Caliphyllidae) is Six Distinct Species
Abstract Integrative studies have revealed cryptic radiations in several Caribbean lineages of heterobranch sea slugs, raising questions about the evolutionary mechanisms that promote speciation within the tropical Western Atlantic. Cyerce Bergh, 1871 is a genus comprising 12 named species in the family Caliphyllidae that lack the photosynthetic ability of other sacoglossans but are noted for vibrant colours on the large cerata (dorsal leaf-like appendages) that characterize many species. Two species are widely reported from the Caribbean: Cyerce cristallina (Trinchese, 1881) and Cyerce antillensis Engel, 1927. Here, we present an integrative assessment of diversity in Caribbean Cyerce. Four methods of molecular species delimitation supported seven species in samples from the Caribbean and adjacent subtropical Western Atlantic. Six delimited species formed a monophyletic lineage in phylogenetic analyses but were > 9% divergent at the barcoding COI locus and could be differentiated using ecological, reproductive and/or morphological traits. We redescribe C. antillensis, a senior synonym for the poorly known Cyerce habanensis Ortea & Templado, 1988, and describe five new species. Evolutionary shifts in algal host use, penial armature and larval life history might have acted synergistically to promote the rapid divergence of endemic species with restricted distributions in this radiation, substantially increasing global diversity of the genus. Caribbean phylogeography, cryptic species, gastropod, heterobranch, species delimitation
 Cyerce browneveorum sp. nov. Cyerce ellingsonorum sp. nov. Cyerce nicholasi sp. nov. Cyerce piercei sp. nov. Cyerce willetteorum sp. nov. Karina Moreno, Diane M Rico, Michael Middlebrooks, Sabrina Medrano, Ángel A Valdés and Patrick J Krug. 2024. A Cryptic Radiation of Caribbean Sea Slugs revealed by Integrative Analysis: Cyerce ‘antillensis’ (Sacoglossa: Caliphyllidae) is Six Distinct Species. Zoological Journal of the Linnean Society. 200(4); 940–979, DOI: 10.1093/zoolinnean/zlad111 | ||||||
| 3:07a | [Ichthyology • 2024] Stiphodon chlorestes • A New Species of sicydiine Goby (Gobiiformes: Oxudercidae) from Taiwan and Luzon
Abstract Stiphodon chlorestes sp. nov. is described based on seven specimens collected from Taiwan and Luzon. It is a large-sized Stiphodon species sharing the second dorsal-fin rays 9–10 and pectoral-fin rays 14–16 with similar-sized congeners. However, it differs from them by the wider interorbital width and almost complete lack of scales on the occipital region in males. In addition, the new species can be further distinguished from all congeners by seven to eight oval bands or a black longitudinal band on the lower body, black and white spots on pectoral fins, and a short red or orange line on posterior upper edge of caudal fin. Molecular analysis based on the 680-bp mitochondrial cytochrome oxidase subunit I (COI) fragments also supports it as a distinct species belonging to the “Stiphodon elegans group” and a sister group of the clade consisting of Stiphodon multisquamus and Stiphodon palawanensis.  Stiphodon chlorestes sp. nov. Green hummingbird goby | 青蜂枝牙鰕虎  Wei-Cheng Jhuang, Al Casane Dimaquibo and Te-Yu Liao. 2024. Stiphodon chlorestes, A New Species of sicydiine Goby (Teleostei: Gobioidei) from Taiwan and Luzon. Journal of Fish Biology. DOI: 10.1111/jfb.15852 |
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