A rapid drop of sea level at the Eocene-Oligocene transition (EOT; 34-33 Ma) triggered a marine mass extinction event and the turnover of terrestrial fauna, but its influence on the diversification of nearshore marine fish communities is unclear. Goby fishes (Acanthomorpha: Percomorpha: Gobiiformes) provide an ideal system to investigate the hypothesis that ecological opportunity at the EOT triggered the proliferation of coastal marine fishes. However, despite more than 30 years of molecular evolutionary research, divergence time estimates for gobies are widely variable, incomplete with respect to sampling of taxonomic families and sub-familial lineages, and far older than evident by the modest fossil record. Here we use 1,314 ultraconserved element (UCE) sequences sampled from 121 species, including all gobiiform families and sub-familial goby lineages, to infer phylogeny and node ages under species tree and relaxed molecular clock models. Our time-calibrated phylogenomic hypothesis reconciles molecular clock- and fossil-based estimates for gobiiform diversification, dating the origin of Apogonidae and Gobioidei to the uppermost Late Cretaceous, with lower to middle Paleogene divergence of the gobioid backbone and an explosion of goby lineages at the EOT. Our results support a remarkably recent evolutionary origin of goby families and stimulate new questions on the seemingly exceptional diversity of the group.

01 Dec 2024·Collections: A Journal for Museum and Archives Professionals

How to Curate and Digitize Bryozoa: Experiences at the Santa Barbara Museum of Natural History

Author: Geiger, Daniel L. ; Henderson, Van ; Gour, Alexandria N. ; Delnavaz, Vanessa

We report on curation and digitization experiences of a large collection of Bryozoa (>19,759 of estimated 38,000 lots digitized, >1,000 type lots). Storage of one to two histology slides in capped glass vials and larger series in twenty-five-slot histology boxes is optimal. Bulk dry material is stored in acid-free containers (cardboard, plastic). Fluid specimens are stored in 70 percent ethanol, with small specimens housed in 20 ml scintillation vials with conical polypropylene lined screw caps. Digitizing is most effective by georeferencing immediately. Unidentified material should at least be roughly identified (family, genus) to encourage loans and ensuing expert identification. Taxonomy and nomenclature are challenging and require an experienced taxonomist. Approaches to specimen counts are discussed.

08 Aug 2024·Nature

Author Correction: Genetic continuity and change among the Indigenous peoples of California

Author: Callan, Kim ; Kearns, Aisling ; Martínez-Ramírez, Júpiter ; Sedig, Jakob ; Punzo Diaz, Jose Luis ; Porcayo-Michelini, Antonio ; Langenwalter, Paul E ; Martin, Debra ; Nakatsuka, Nathan ; Oppenheimer, Jonas ; Johnson, John R ; Mah, Matthew ; Qiu, Lijun ; Carpenter, John ; Iliev, Lora ; Workman, J Noah ; Zalzala, Fatma ; Valdes Herrera, Alejandro ; Culleton, Brendan J ; Reich, David ; Mallick, Swapan ; Rohland, Nadin ; Villapando-Canchola, M Elisa ; Micco, Adam ; Michel, Megan ; Lawson, Ann Marie ; Tiesler, Vera ; Harper, Thomas K ; García-Moreno, Cristina ; Holguin, Brian ; Curtis, Elizabeth

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