منابع مشابه
Exceptional preservation of eye structure in arthropod visual predators from the Middle Jurassic
Vision has revolutionized the way animals explore their environment and interact with each other and rapidly became a major driving force in animal evolution. However, direct evidence of how ancient animals could perceive their environment is extremely difficult to obtain because internal eye structures are almost never fossilized. Here, we reconstruct with unprecedented resolution the three-di...
متن کاملMolecular phylogenetic evidence for the independent evolutionary origin of an arthropod compound eye.
Eyes often take a central role in discussions of evolution, with debate focused on how often such complex organs might have evolved. One such debate is whether arthropod compound eyes are the product of single or multiple origins. Here we use molecular phylogeny to address this long-standing debate and find results favoring the multiple-origins hypothesis. Our analyses of DNA sequences encoding...
متن کاملARTHROPOD BIOLOGY Characteristics of A Red-Eye Mutant of the Tarnished Plant Bug (Heteroptera: Miridae)
Normal eye color of the tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is darkpurplish-black.A strainhomozygous for anewmutation, redeyecolor,wasestablishedandreared in the laboratory for 5 yr. Themutant phenotype is controlled by a single autosomal recessive allele. The gene symbol assigned to this new mutant is r. Laboratory tests showed that egg production and egg viability in ...
متن کاملWhat arthropod brains say about arthropod phylogeny.
W hat can we learn from the brain of a single member of a species? If the brain is that of a remipede, the focus of a report by Fanenbruck et al. (1) in this issue of PNAS, the answer is something new about arthropod phylogeny. The Remipedia, discovered in 1979, are crustaceans found deep in the waters of coastal caves (2, 3). To date, twelve species of remipedes are known: one from a single ca...
متن کاملRed Eye due to Leech in the Eye
A 65–yrs-old man referred for an ocular discomfort and red eye. The clinical diagnosis was leech in the left eye and its species confirmed as being Limnatis nilotica. Ocular leech infestation should be considered in patients with a history of swimming or washing their face in streams and lakes. Attention should also be given to ocular leech infestation in the differential diagnosis of ocular tr...
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 1886
ISSN: 0003-0147,1537-5323
DOI: 10.1086/274344