The agouti (Dasyprocta sp.), a medium-sized neotropical rodent, was introduced by indigenous peoples to the Caribbean islands over a millennium ago and is recorded at archeological sites throughout the Lesser Antilles and southern Caribbean. Like many commensal fauna, these mammals are valuable proxies for deciphering ancient human practices and mobility. However, unsystematic reporting and ambiguous data hinder determination of the agouti's timing of entry, paths of dissemination, distribution, ecological impact, and cultural significance. Here, we present the first systematic review of all published records of which we are aware for pre-1492 agouti skeletal remains in the Caribbean, totaling 63 sites on 24 islands. On the basis of these data, we address the issue of archeological species attributions in relation to unresolved phylogenetic and taxonomic issues for Dasyprocta spp. In addition, we synthesize findings for agouti distribution, abundance, and chronology of occurrence. Data are consistent with an initial introduction to the northern Lesser Antilles by ca. AD 35 and perhaps as early as ca. 500 BC. While the midden contexts in which agoutis are almost always found affirm their use as food, ethnohistoric records point to the utilization of skeletal remains in ritual and artifact manufacture. This study provides the first region-wide synthesis of archeological agoutis and highlights the important insights to be gained from such systematic reviews. It is particularly significant for informing the potential ecological impacts of indigenous faunal introductions prior to Columbus's arrival.

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We report here a giant microfossil resembling the conidium of an ascomycete fungus (cf. Alternaria alternata). The specimen is preserved in stromatolitic black chert of the Gunflint Iron Formation (Paleoproterozoic Eon, Orosirian Period, ca. 1.9-2.0 Ga) of southern Ontario, Canada, and the rock that provided the thin section may have been collected by Elso Barghoorn as part of the original discovery of the Gunflint microbiota. The large size of the fossil sets it apart from other, tiny by comparison, Gunflint microfossils. The fossil is 200 microns in length and has cross walls. Individual cells are 30-46 microns in greatest dimension. The apical ‘spore’ is cap-shaped, and has partly separated from the rest of the structure. Cloulicaria gunflintensis gen. nov. sp. nov. may provide early evidence for eukaryotes (fungi) in the fossil record, and may also represent the earliest evidence for asexual reproduction in a eukaryote by means of mitospores.

The short‐tailed albatross ( Phoebastria albatrus ) is a threatened seabird whose present‐day range encompasses much of the North Pacific. Within this species, there are two genetic clades (Clades 1 and 2) that have distinctive morphologies and foraging ecologies. Due to a global population collapse in the late 19th and early 20th centuries, the frequency of these clades among the short‐tailed albatross population that historically foraged off British Columbia, Canada, is unclear. To document the species' historical genetic structure in British Columbia, we applied ancient DNA (aDNA) analysis to 51 archaeological short‐tailed albatross specimens from the Yuquot site (Borden site number: DjSp‐1) that span the past four millennia. We obtained a 141 bp cytochrome b sequence from 43 of the 51 (84.3%) analyzed specimens. Analyses of these sequences indicate 40 of the specimens belong to Clade 1, while 2 belong to Clade 2. We also identified a single specimen with a novel cytochrome b haplotype. Our results indicate that during the past four millennia most of the short‐tailed albatrosses foraging near Yuquot belonged to Clade 1, while individuals from other lineages made more limited use of the area. Comparisons with the results of previous aDNA analyses of archaeological albatrosses from Japanese sites suggest the distribution of Clades 1 and 2 differed. While both albatross clades foraged extensively in the Northwest Pacific, Clade 1 albatrosses appear to have foraged along the west coast of Vancouver Island to a greater extent. Due to their differing distributions, these clades may be exposed to different threats.

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