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Hace 4 días · Peer-reviewed. Research Article. Quantitative evidence for dimorphism suggests sexual selection in the maxillary caniniform process of Placerias hesternus. James L. Pinto , Charles R. Marshall, Sterling J. Nesbitt, Daniel Varajão de Latorre. Published: May 31, 2024. https://doi.org/10.1371/journal.pone.0297894. Article. Authors. Metrics. Comments.
Hace 4 días · Sexual dimorphism is the condition where sexes of the same species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most dioecious species, which consist of most animals and some plants.
6 Walking legs tipped with four claws, similar to those on insect and spider feet 6 swimming flippers to assist the tail in propulsion and steering 4 pairs of muscular spiracles ahead of the first pair of legs allow active respiration. The semi-aquatic forms evolve two pairs for air breathing while keeping the rest for breathing water.
They're good hunters, with powerful legs and sharp claws. Ifritti specimens have been observed to totally lack sexual dimorphism in their species. The Ifrit have an extra lobe of the brain, just behind the brow, called "The Chameleon Cortex" which allows them to appear as a member of a structurally similar species.
Hace 10 horas · Background This study sheds light on the genetic blueprints of chaetogenesis (bristle formation), a complex biomineralization process essential not only for the diverse group of bristle worms (annelids) but also for other spiralians. We explore the complex genetic mechanisms behind chaetae formation in Osedax japonicus, the bone-devouring deep-sea worm known for its unique ecological niche and ...
Hace 4 días · Sexual behaviour is a process by which humans and other animals demonstrate and/or express sexuality. Oxytocin. Pheromone. Sexual dimorphism. Vasopressin. Latest Research and Reviews....
Where evolution meets science fiction and art. Speculative Evolution (also called Speculative Biology and Speculative Zoology) is the envisioning of fictional, but scientifically possible creatures that could have existed on an alternate Earth, or might actually exist somewhere on another planet or in the deep sea.
