Flashcards on Phylogenomic Resolution of Insect Evolution
Phylogenomic Resolution of Insect Evolution Explained
Tap to flip · Swipe to navigate
Insect Evolution - Phylogeny
48 cards
Card 1
Question: What phylogenetic relationship was found for Tricholepidion concerning other silverfish?
Answer: Tricholepidion diverged from other silverfish in the Late Triassic (~214 Ma), supporting the monophyly of silverfish.
Card 2
Question: What implications does the position of Tricholepidion have for characters such as the ligamentous cephalic endoskeleton, abdominal styli, and coxal ve
Answer: It implies parallel and independent losses of these traits in winged insects and in silverfish.
Card 3
Question: When do the first unequivocal winged insect fossils appear, and what does this suggest about the origin of flight?
Answer: Winged insect fossils exist from the Late Mississippian (~324 Ma), implying an origin of flight prior to the Late Carboniferous.
Card 4
Question: Which mandibular fossil suggests an older origin for winged insects, and what period would it indicate?
Answer: †Rhyniognatha (~412 Ma) suggests an origin of winged insects between the Early Devonian and Late Silurian.
Card 5
Question: According to the study, what phylogenetic relationship exists between Ephemeroptera and Odonata?
Answer: Analyses indicate that Ephemeroptera and Odonata derive from a common ancestor, although node support for Palaeoptera is low.
Card 6
Question: What group does Polyneoptera comprise, and what is its estimated temporal origin?
Answer: Polyneoptera includes earwigs, stoneflies, orthopterans, Embioptera, Phasmatodea, Mantophasmatodea, Grylloblattodea, cockroaches, mantises, termites,
Card 7
Question: What does the study suggest about the diversification of cockroaches, mantises, termites, and phasmids concerning the Permian extinction?
Answer: It suggests that the greatest diversity within these groups evolved after the Permian mass extinction.
Card 8
Question: What is the estimated origin for Hemiptera and Thysanoptera, and what paleoecological implication does it have?
Answer: Their origin was estimated at ~373 Ma (CI 401–346 Ma), supporting the possibility that stylet marks in the Early Devonian (~380 Ma) could be of hemipt
Card 9
Question: What result did the study obtain regarding the position of Psocodea (bark lice and true lice) relative to Holometabola?
Answer: It recovered Psocodea as the probable closest living relatives of Holometabola, with an estimated divergence of ~362 Ma (CI 390–334 Ma), although this
Card 10
Question: When was the radiation of parasitic lice estimated, and what hypothesis does it contradict?
Answer: The radiation of parasitic lice was estimated at ~53 Ma (CI 67–46 Ma), which contradicts the hypothesis of their origin on feathered theropod dinosaur