Results 11 to 20 of about 109 (95)

Trilobites of Thailand's Cambrian–Ordovician Tarutao Group and their geological setting

Papers in Palaeontology, Volume 9, Issue 5, September/October 2023., 2023
Abstract Tuff‐bearing upper Cambrian to lowermost Ordovician strata on Ko Tarutao island, Satun province, southernmost peninsular Thailand, contain a rich trilobite fauna relevant to global biostratigraphy, peri‐Gondwanan palaeogeography and shifting evolutionary mode.
Shelly J. Wernette, Nigel C. Hughes, Paul M. Myrow, Apsorn Sardsud   +3 more
wiley   +1 more source

Cryptic, sibling or neither of the two? Integrative species delimitation of Psylliodes flea beetles with overlapping ranges

Zoologica Scripta, Volume 52, Issue 3, Page 235-248, May 2023., 2023
Abstract Species identification and delimitation are particularly challenging for morphologically similar and geographically overlapping species, such as in the case of Western Palaearctic flea beetle species Psylliodes kiesenwetteri Kutschera, 1864 and Psylliodes ruffoi Leonardi, 1975.
Emanuele Berrilli, Maurizio Biondi, Paola D'Alessandro, Daniele Salvi   +3 more
wiley   +1 more source

An interpolation problem in the Denjoy–Carleman classes

Mathematische Nachrichten, Volume 296, Issue 3, Page 902-914, March 2023., 2023
Abstract Inspired by some iterative algorithms useful for proving the real analyticity (or the Gevrey regularity) of a solution of a linear partial differential equation with real‐analytic coefficients, we consider the following question. Given a smooth function defined on [a,b]⊂R$[a,b]\subset {\mathbb {R}}$ and given an increasing divergent sequence ...
Paolo Albano, Marco Mughetti
wiley   +1 more source

Molecular phylogenetics of subfamily Urgineoideae (Hyacinthaceae): Toward a coherent generic circumscription informed by molecular, morphological, and distributional data

Journal of Systematics and Evolution, Volume 61, Issue 1, Page 42-63, January 2023., 2023
Floral variation in the genera of Urgineoideae Abstract The taxonomy and systematics of Urgineoideae (Hyacinthaceae) have been controversial in recent decades, with contrasting taxonomic treatments proposed based on preliminary and partial studies that have focused on morphology and/or solely plastid DNA sequence data. Some authors have recognized only
Mario Martínez‐Azorín, Manuel B. Crespo, María Ángeles Alonso‐Vargas, Michael Pinter, Neil R. Crouch, Anthony P. Dold, Ladislav Mucina, Martin Pfosser, Wolfgang Wetschnig   +8 more
wiley   +1 more source

Local and non‐local Poincaré inequalities on Lie groups

Bulletin of the London Mathematical Society, Volume 54, Issue 6, Page 2162-2173, December 2022., 2022
Abstract We prove a local Lp$L^p$‐Poincaré inequality, 1⩽p<∞$1\leqslant p < \infty$, on non‐compact Lie groups endowed with a sub‐Riemannian structure. We show that the constant involved grows at most exponentially with respect to the radius of the ball, and that if the group is non‐doubling, then its growth is indeed, in general, exponential.
Tommaso Bruno, Marco M. Peloso, Maria Vallarino   +2 more
wiley   +1 more source

The ant abdomen: The skeletomuscular and soft tissue anatomy of Amblyopone australis workers (Hymenoptera: Formicidae)

Journal of Morphology, Volume 283, Issue 6, Page 693-770, June 2022., 2022
The ant abdomen is critically understudied, despite its functional, evolutionary, and systematic importance. Using physical dissection, scanning electron microscope, histology, and microcomputed tomography, we provide the first complete treatment of the skeletomusculature, exocrine glands, and other major organs of the abdomen.
Ziv E. Lieberman, Johan Billen, Thomas van de Kamp, Brendon E. Boudinot   +3 more
wiley   +1 more source

A nondestructive method of calculating the wing area of insects

Ecology and Evolution, Volume 12, Issue 4, April 2022., 2022
Forewing area was found to be proportional to the product of forewing length and width for each of three cicada species, which followed the Montgomery equation. The mixed dataset of the three cicada species also followed the Montgomery equation, which suggests that this equation can apply to the calculation of wing area for other insects with similar ...
Kexin Yu, Gadi V. P. Reddy, Julian Schrader, Xuchen Guo, Yirong Li, Yabing Jiao, Peijian Shi   +6 more
wiley   +1 more source

Regularity for a Nonlinear Discontinuous Subelliptic System with Drift on the Heisenberg Group

Advances in Mathematical Physics, Volume 2022, Issue 1, 2022., 2022
In this paper, we prove the partial Hölder regularity of weak solutions and the partial Morrey regularity to horizontal gradients of weak solutions to a nonlinear discontinuous subelliptic system with drift on the Heisenberg group by the A‐harmonic approximation, where the coefficients in the nonlinear subelliptic system are discontinuous and satisfy ...
Junli Zhang, Jialin Wang, Pietro d Avenia   +2 more
wiley   +1 more source

Biostratigraphy and taxonomy of Drumian (middle Cambrian) agnostid trilobites of the Manuels River Formation, Avalonian Newfoundland, Canada

Papers in Palaeontology, Volume 7, Issue 3, Page 1657-1698, August 2021., 2021
Abstract New, accurately located and well‐preserved agnostid trilobite material has been collected from the type locality of the Drumian (middle Cambrian, Miaolingian) Manuels River Formation, Newfoundland, Canada. The well‐exposed grey to black shales containing the fauna were deposited on the former microcontinent Avalonia.
Anne Hildenbrand, Gregor Austermann, Christina Ifrim, Peter Bengtson, Javier Álvaro   +4 more
wiley   +1 more source

Subelliptic wave equations are never observable

Analysis & PDE, 2023
It is well-known that observability (and, by duality, controllability) of the elliptic wave equation, i.e., with a Riemannian Laplacian, in time $T_0$ is almost equivalent to the Geometric Control Condition (GCC), which stipulates that any geodesic ray meets the control set within time $T_0$.
openaire   +3 more sources