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Article Reference Morphological and molecular characterisation of Xiphinema zagrosense sp.n. (Dorylaimida: Longidoridae) from the Zagros Mountains, Iran
Located in Library / RBINS Staff Publications
Article Reference Morphological and molecular characterisation of Trichodorus golestanensis (Nematoda: Trichodoridae), a new species from Iran.
Located in Library / RBINS Staff Publications
Article Reference Morphological and molecular characterization of Coynema poeyi (Coy, García & Álvarez, 1993) (Oxyuridomorpha: Hystrignathidae) from Antillanax pertyi (Kaup, 1869) (Coleoptera: Passalidae) from Cuba and new locality records for the species
Located in Library / RBINS Staff Publications 2018
Article Reference Morphological and molecular characterization of Lepidonema magnum Morffe & García, 2010 (Nematoda: Oxyuridomorpha: Hystrignathidae) from Passalus interstitialis Eschscholtz, 1829 (Coleoptera: Passalidae) from Cuba and new locality records for the species
Located in Library / RBINS Staff Publications 2019
Article Reference Morphological and molecular characterization of larval trematodes infecting the assassin snail genus Anentome in Thailand
Located in Library / RBINS Staff Publications 2022
Article Reference Morphological and molecular characterization of Klossnema viguerasi n. sp. (Nematoda: Oxyuridomorpha: Hystrignathidae) from a Cuban passalid beetle (Coleoptera: Passalidae), first record of the genus for Cuba
Located in Library / RBINS Staff Publications 2021
Article Reference Morphological deformities in Chironomus riparius meigen larvae after exposure to cadmium over several generations
In order to test the potential of chironomid deformities for biomonitoring, induction of morphological deformities in Chironomus riparius larvae was assessed after chronic exposure (static with renewal) of eggs and subsequent instars to sublethal nominal cadmium concentrations of 0, 3 (NOEC), 9 (intermediate) and 27 (chronic LC'50) μg Cd 1-1 during 7 to 10 generations. Deformities which could be associated with an indirect or direct cadmium effect were split medial mentum teeth (more frequent in 9 and 27 μg Cd 1-1) and premandible deformities (especially in 3 μg Cd 1-1). The control contained more larvae with additional teeth in mentum and mandible than the metal-exposed conditions. In the 9 μg Cd 1-1 condition the frequencies of larvae with split medial mentum teeth increased in the last four generations, to reach 40\%. The unpredictability of fluctuations of deformity frequencies over the generations was associated with parental effects and experimental manipulation. The deformity percentages correlated positively with the mortalities and could be related to the induction of tolerance to cadmium, as was concluded on the basis of life cycle analysis in a previous paper. This experiment demonstrated a concentration-response relationship between deformities and sublethal levels of cadmium. However, the observed generation fluctuations caution for (1) the use of single-generation experiments for defining ecotoxicological threshold values, and (2) experimentally induced genetical drift in multi-generation experiments.
Located in Library / RBINS Staff Publications
Article Reference Morphological differences between putative Paleolithic dogs and wolves: A commentary to Janssens et al. (2021)
Located in Library / RBINS Staff Publications 2022
Article Reference ECMAScript program Morphological disparity of extant and extinct pinaceous ovulate cones: How many cones are enough?
Premise The expansion of Pinaceae during the Cretaceous is exemplified by the numerous ovulate cone taxa found in western Europe and North America. The Belgian Wealden facies deposits have delivered hundreds of exceptionally well-preserved yet isolated pinaceous ovulate cones; these cones were placed by convention within form-genera. Ten species have been described in Belgium, representing about 20% of the known fossil record of this period. However, the validity of these taxa is questionable because their intra- and interspecific variabilities have never been thoroughly studied. Moreover, quantifying the expansion of Pinaceae in terms of morphospace occupation is desirable to reveal the dynamics of this critical radiation. Methods We used linear and geometric morphometry to quantify the shape of the extensive sample of Cretaceous cones of Belgium. These methods were also applied to extant pinaceous species to compare the morphological disparity of Cretaceous assemblages against those of today in selected ecosystems. We used ordination methods (PCA) to visualize morphospace occupation and test for species delineation. Results The morphological disparity was not higher in fossil species than in extant species we sampled. Both morphological approaches confirmed that the species Pityostrobus andraei presents high morphological variability. Our resampling tests indicate that ovulate cone morphological variability can be satisfactorily quantified with as few as 15 specimens. Conclusions The methodology used here is relevant for quantifying both the variability and the diversity of many fossil assemblages, paving the way for a more robust evaluation of Cretaceous pinaceous diversity.
Located in Library / RBINS Staff Publications 2022
Article Reference Morphological evidence for early dog domestication in the European Pleistocene: New evidence from a randomization approach to group differences
The antiquity of the wolf/dog domestication has been recently pushed back in time from the Late Upper Paleolithic (~14,000 years ago) to the Early Upper Paleolithic (EUP; ~36,000 years ago). Some authors questioned this early dog domestication claiming that the putative (EUP) Paleolithic dogs fall within the morphological range of recent wolves. In this study, we reanalyzed a data set of large canid skulls using unbalanced‐ and balanced‐randomized discriminant analyses to assess whether the putative Paleolithic dogs are morphologically unique or whether they represent a subsample of the wolf morpho‐population. We evaluated morphological differences between 96 specimens of the 4 a priori reference groups (8 putative Paleolithic dogs, 41 recent northern dogs, 7 Pleistocene wolves, and 40 recent northern wolves) using discriminant analysis based on 5 ln‐transformed raw and allometrically size‐adjusted cranial measurements. Putative Paleolithic dogs are classified with high accuracies (87.5 and 100.0%, cross‐validated) and randomization experiment suggests that these classification rates cannot be exclusively explained by the small and uneven sample sizes of reference groups. It indicates that putative Upper Paleolithic dogs may represent a discrete canid group with morphological signs of domestication (a relatively shorter skull and wider palate and braincase) that distinguish them from sympatric Pleistocene wolves. The present results add evidence to the view that these specimens could represent incipient Paleolithic dogs that were involved in daily activities of European Upper Paleolithic forager groups.
Located in Library / RBINS Staff Publications 2021