Cuticle ultrastructure of the Early Devonian trigonotarbid arachnid Palaeocharinus
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.The cuticle of ancient arachnids like Palaeocharinus featured scales and pores for terrestrial survival. Its thick structure and internal wax canals reveal early adaptations for life on land.
Area Of Science
- Paleontology
- Evolutionary Biology
- Arthropod Science
Background
- The arthropod cuticle is a critical evolutionary development enabling terrestrial life.
- Previous research focused on extant arthropods and fossil evidence for cuticle evolution.
- Trigonotarbids, including Palaeocharinus, represent some of the earliest terrestrial arachnids.
Purpose Of The Study
- To investigate the three-dimensionally preserved cuticular structure of Palaeocharinus.
- To understand the cuticle's role in the terrestrial adaptation of early arachnids.
- To reveal nanoscale morphological features of the Palaeocharinus cuticle.
Main Methods
- Confocal Laser Scanning Microscopy (CLSM) for high-resolution imaging.
- Analysis of fossilized Palaeocharinus from the Early Devonian Rhynie chert.
- Examination of external and internal cuticular microstructures.
Main Results
- Palaeocharinus cuticle exhibits external scales, sensilla, and pores (dermal glands, wax canals).
- Internal pore canals show polygonal clusters and a twisted plywood (Bouligand) arrangement.
- The cuticle is notably thick, suggesting adaptation to terrestrial environments.
Conclusions
- The Palaeocharinus cuticle displays complex structures facilitating terrestrial life.
- Internal wax transport mechanisms were present in early terrestrial arachnids.
- Cuticular thickening in Palaeocharinus likely represents an adaptation to prevent water loss on land.
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
Related Concept Videos
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.