Diastema - Wikipedia
A diastema (pl.: diastemata, from Greek διάστημα, 'space') is a space or gap between two teeth. Many species of mammals have diastemata as a normal feature, most commonly between the incisors and molars. More colloquially, the condition may be referred to as gap teeth or tooth gap.
Evolution of long-toothed fishes and the changing nature of fish ...
Jan 15, 2014 · Here we show that fish teeth have been remarkably consistent for at least 240 My with a single major innovation, a long-toothed form, which reaches its zenith on Recent coral reefs.
Fish Teeth 101: Characteristics, Morphologies, And Evolution
Aug 10, 2024 · Some fish have small, pointed teeth for catching small prey, while others have large, flat teeth for crushing shells and bones. Some fish even have teeth with razor-sharp edges for catching and eating other fish! But what are these different morphologies, and how do they help fish survive?
Amazing Diversity in Fish Dentition | OSU Bio Museum
May 13, 2016 · Flathead Catfish – gulp prey with large, non-protrusible mouth and hold with cardiform teeth, the largest patches of which are shown in this picture of a partial, disarticulated jaw, on the premaxillary (top of image) and anterior dentary (larger, semicircular structure at bottom of image) bones.
X-Rays Reveal the Biting Truth About Parrotfish Teeth
Nov 15, 2017 · Now, a study by scientists – including those at the Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) – has revealed a chain mail-like woven microstructure that gives parrotfish teeth their remarkable bite and resilience.
The tooth, the whole tooth and nothing but the tooth
Fish, however, do not generally have multiple types of teeth, relying instead on a barrage of identical designs — although there are some exceptions. The Bluntnose sixgill shark is one of them, having a variety of different shark teeth and circular teeth.
This Fish Loses and Regrows 20 Teeth Each Day | Smithsonian
Nov 16, 2021 · The omnivorous fish, which can grow up to five feet in length and weigh 80 pounds, has more than 500 needle-sharp, tiny teeth lining its two sets of jaws. A new study found that Pacific lingcod...
Fish teeth mark periods of evolution - Harvard Gazette
Nov 16, 2018 · Based on close examination of thousands of fossilized fish teeth, a Harvard researcher found that, while the asteroid impact that killed off the dinosaurs did lead to the extinction of some fish species, it also set the stage for …
New Fossil Tells How Piranhas Got Their Teeth - ScienceDaily
Jun 26, 2009 · Named Megapiranha paranensis, this previously unknown fossil fish bridges the evolutionary gap between flesh-eating piranhas and their plant-eating cousins.
The Microstructure of a Parrotfish Tooth Contributes to Its Toughness - ALS
The results revealed that bundles of crystals interwoven like chain mail give parrotfish teeth their remarkable bite and resilience. Mechanical measurements found that the hardness and stiffness increase gradually, from the back to the tip of each tooth.