![]() Given that the fibula of the same individual has well-vascularised fibrolamellar bone tissue without any growth marks in the cortex this suggests variation in skeletal growth. However, the histology of two ribs and a previously described femur of another Anteosaurus taxon revealed an interrupted growth pattern with lines of arrested growth and peripheral rest lines occurring in the compacta, indicating periodic pauses in growth possibly linked to the slowing down of growth during maturity. The bone histology of Anteosaurus magnificus reveals that the cortex is composed of highly vascularized, uninterrupted fibrolamellar bone tissue surrounding the inner spongy medullary region. Here we examine the bone microstructure of multiple skeletal elements of Anteosaurus from the Tapinocephalus Assemblage Zone of the Karoo Basin. Additional studies (on other arthropod groups and other seasons of the year) could provide a better understanding of the local processes of extinction and colonization of the species inhabiting these fragile coastal environments.ĭespite its abundance in the Permian fossil record of South Africa, little is known about the life history of Anteosaurus. Preliminarily we found a negative correlation between the area of the pools and the richness (species) and abundance of insects. Additionally, the hierarchical and ordering analysis showed groupings of pools located in the northwest and southeast of Huentelauquén. The non-parametric estimators evaluated showed wealth values above those observed for all the studied pools, and their accumulation curves suggest the existence of an incomplete species inventory in the studied community. Coleoptera and Hymenoptera were the best represented orders, with Neuroptera, Orthoptera and Plecoptera being poorly represented groups. By using pitfall traps, 10,762 individuals were captured, represented by 7 orders, 27 families, and 51 species. Based on the limited knowledge about the fauna-particularly insects-associated to these ecosystems, the objective of this study was to characterize the richness, composition, structure and similarity of the insect communities associated with ephemeral pools in Huentelauquén (29º S, Coquimbo Region, Chile). The annual input of leaves from these trees help provide a detritus-based food source for a variety of invertebrates.Abstract In northern central Chile, ephemeral pools constitute shallow isolated water bodies with a favourable habitat for fauna adapted to seasonal changes. Trees adjacent to ephemeral ponds provide a variety of benefits such as maintaining cool water temperatures, preventing premature drying, and contributing to the food web. They also provide feeding, resting, and breeding habitat for songbirds and a source of food for many mammals and contribute in many ways to the biodiversity of a woodlot, forest stand, and the larger landscape.Ĭommon wetland plants found in ephemeral ponds include yellow water crowfoot, mermaid weed, Canada bluejoint grass, floating manna grass, spotted cowbane, smartweeds, orange jewelweed, and sedges. Ephemeral ponds, also referred to as vernal pools, provide critical breeding habitat for invertebrates and many amphibians such as wood frogs and several salamanders, because they lack the fish that would typically prey on them, their egg masses and tadpoles. They flourish with productivity during their brief existence. Ephemeral ponds are small fishless pools with impeded drainage, usually in forest landscapes, that hold water for a short time following snowmelt and spring rains but typically dry out by mid-summer. ![]()
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