294 research outputs found
Jörg Wunderlich (ed.) (2012): Fifteen papers on extant and fossil spiders (Araneae)
This book consists of fifteen papers (considered below as Chapters) on fossil and extant arachnids, mostly spiders. Most papers are written by the editor, two papers in cooperation with Peter JĂ€ger and with SĂžren Toft, and a single one by Peter JĂ€ger. Chapters 1 and 2 are identification keys to the European genera of the families Zodariidae and Corinnidae, respectively
Review of "Hemoparasites of the Reptilia. Color Atlas and Text" by Sam R. Telford, Jr
Book review of "Hemoparasites of the Reptilia. Color Atlas and Text" by Sam R. Telford, Jr
Review of "Primate Parasite Ecology: The dynamics and study of host-parasite relationships" by Michael A. Huffman and Colin A. Chapman (Eds.)
Book review of "Primate Parasite Ecology: The dynamics and study of host-parasite relationships" by Michael A. Huffman and Colin A. Chapman (Eds.
Taphonomy of fossilized resins: determining the biostratinomy of amber
Comparing the maturity of fossilized resins with that of their enclosing bedrock can provide information on the maturity, relative age and biostratinomy of amber and copal. A method to determine this is presented here with examples of amber and copal from the Dominican Republic. Maturity of the bedrock was determined by vitrinite reflection and that of the fossilized resin by FTIR analysis. Vitrinite oxidation values showed maturity states corresponding to lignite and sub-bituminous coal ranks. While the samples from some mines demonstrated that the maturities of the rock and fossilized resin were syngenetic, other samples indicated that recycling of the amber may have occurred. Darkening of the amber (from yellow to red) was correlated with increased oxidation / weathering. This method can be a useful tool for understanding the biostratinomy of fossilized resins
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Palaeoplethodon hispaniolae gen. n., sp. n. (Amphibia: Caudata), a fossil salamander from the Caribbean Palaeodiversity 8: 21â29; Stuttgart 30 December 2015.
A salamander hatchling, Palaeoplethodon hispaniolae gen. n., sp. n. (Amphibia: Caudata), is described from
Dominican Republic amber. While physical features align the fossil with members of the family Plethodontidae,
the short forelimb with the foot lacking distinct digits and the long hind limb with elongated foot and strongly fused
digits, as well as its presence in 15â40 mya Dominican amber, distinguish the fossil from previously described salamanders.
The apparent 13â14 costal grooves and strongly webbed digits are characters shared with members of
the extant plethodontid genus Bolitoglossa PETERS, 1879, the most speciose genus of Neotropical salamanders. This
is the first salamander recovered from any amber source and the first undisputed salamander reported from the
Caribbean region
Nematode Parasites and Associates of Ants: Past and Present
Ants can serve as developmental, definitive, intermediate, or carrier hosts of a variety of nematodes. Parasitic ant nematodes include members of the families Mermithidae, Tetradonematidae, Allantonematidae, Seuratidae, Physalopteridae, Steinernematidae, and Heterorhabditidae. Those nematodes that are phoretically associated with ants, internally or externally, are represented by the Rhabditidae, Diplogastridae, and Panagrolaimidae. Fossils of mermithids, tetradonematids, allantonematids, and diplogastrids associated with ants show the evolutionary history of these relationships, some of which date back to the Eocene (40 mya)
THE OLDEST ANTS ARE CRETACEOUS, NOT EOCENE: REPLY
Our study of the Hat Creek amber (Poinar et al. 1999) was undertaken to determine the range of the biota in the resin, to identify the plant that produced the resin, and to assess the future implications of these significant deposits. The study was in no way "compromisedâ by providing an alternative interpretation of the systematic position of the genus Sphecomyrma Wilson and Brow
Halophilanema prolata n. gen., n. sp. (Nematoda: Allantonematidae), a parasite of the intertidal bug, Saldula laticollis (Reuter)(Hemiptera: Saldidae) on the Oregon coast
This is the publisherâs final pdf. The published article is copyrighted by BioMed Central and can be found at: http://www.biomedcentral.com/.Background: It is rare to find terrestrial nematode lineages parasitizing arthropods inhabiting the intertidal or\ud
littoral zone of the oceans. During an ecological study along the Oregon dunes, an allantonematid nematode\ud
(Tylenchomorpha: Allantonematidae) was discovered parasitizing the intertidal shore bug, Saldula laticollis (Reuter)\ud
(Hemiptera: Saldidae). This shore bug is adapted to an intertidal environment and can survive short periods of\ud
submergence during high tides. The present study describes the nematode parasite and discusses aspects of its\ud
development, ecology and evolution.\ud
Methods: Adults and last instar nymphs of S. laticollis (Hemiptera: Saldidae) were collected from the high intertidal\ud
zone among clumps of Juncus L. (Juncaceae) plants at Waldport, Oregon on October 3, 2011. The bugs were\ud
dissected in 1% saline solution and the nematodes killed in 1% Ringers solution and immediately fixed in 5%\ud
formalin (at 20°C). Third stage juveniles removed from infected hosts were maintained in 1% saline solution until\ud
they matured to the adult stage, molted and mated.\ud
Results: Halophilanema prolata n. gen., n. sp. (Nematoda: Allantonematidae) is described from last instar nymphs\ud
and adults of the intertidal bug, Saldula laticollis on the Oregon coast. The new genus can be distinguished from\ud
other genera in the Allantonematidae by a stylet lacking basal knobs in both sexes, an excretory pore located\ud
behind the nerve ring, ribbed spicules, a gubernaculum, the absence of a bursa and the elongate-tubular shape of\ud
the ovoviviparous parasitic females. Studies of the organogenesis of Halophilanema showed development to third\ud
stage juveniles in the uterus of parasitic females. Maturation to the free-living adults and mating occurred in the\ud
environment. The incidence of infection of S. laticollis ranged from 0% to 85% depending on the microhabitat in\ud
the intertidal zone.\ud
Conclusions: Based on the habitat and morphological characters, it is proposed that Halophilanema adapted a\ud
parasitic existence fairly recently, evolutionarily speaking. It was probably a free-living intertidal or shore nematode\ud
that fed on microorganisms, especially fungi, in the intertidal habitat and became parasitic after saldids entered the\ud
environment. Halophilanema represents the first described nematode parasite of an intertidal insect
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Birdâs nest fungi (Nidulariales: Nidulariaceae) in Baltic and Dominican amber
Nitula baltica sp. nov. and Cyathus dominicanus sp. nov. are described from Cenozoic Baltic and Dominican amber. These are the first fossil members of the Family Nidulariaceae and show that the basic characteristics of this group were already established some 40-50 million years ago.This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier and can be found at: http://www.journals.elsevier.com/fungal-biology/.,In the final published version of this article, the legend for figure 1 should read âLateral view of Nidula baltica in Baltic amberâ instead of âLateral view of Lepidiosomus balticusâ, the legend for figure 2 should read âTop view of peridium of N. baltica in Baltic amberâ instead of âTop view of peridium of L. balticusâ and the legend for figure 3 should read âLateral view of peridium of C. dominicanus in Dominican amberâ instead of âLateral view of peridium of C. dominicanaâ. The author's manuscript version as found in ScholarsArchive@OSU is correct.Keywords: Cenozoic Nidulariaceae, Amber fossils, Birdâs nest fungiKeywords: Cenozoic Nidulariaceae, Amber fossils, Birdâs nest fung
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