Results 161 to 170 of about 1,897 (207)
Cockroaches (Blattaria) of Ecuador—checklist and history of research
Zootaxa, 2013 Cockroaches are an understudied group and the total number of described taxa increases every year. The last checklist of Ecuador species was published in 1926. The main aim of this study was to complete a new checklist of cockroach species recorded in Ecuador supplemented with a research history of cockroaches (Blattaria) on the territory of ...
VIDLIČKA, ĽUBOMÍR
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1978
Cockroaches are probably the most pervasive of all insect domiciliary pests. As invaders of the environments we have created for our own comfort, they have established themselves in our homes, businesses, hospitals, places of food storage and preparation, transportation systems, and underground utility networks.
L. M. Roth, D. W. Alsop
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Cockroaches are probably the most pervasive of all insect domiciliary pests. As invaders of the environments we have created for our own comfort, they have established themselves in our homes, businesses, hospitals, places of food storage and preparation, transportation systems, and underground utility networks.
L. M. Roth, D. W. Alsop
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Annals of the Entomological Society of America, 1968
Both the Blattoidea and Blaberoidea probably evolved from a stock in which 3 or more oocytes in an ovariole contained yolk at the time of oviposition. In the Blattoidea, the line that did not evolve viviparity, the maximum number of oocytes containing yolk (Zone V) per ovariole is 2 or 3. The superfamily Blaberoidea, in which viviparity evolved, shows
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Both the Blattoidea and Blaberoidea probably evolved from a stock in which 3 or more oocytes in an ovariole contained yolk at the time of oviposition. In the Blattoidea, the line that did not evolve viviparity, the maximum number of oocytes containing yolk (Zone V) per ovariole is 2 or 3. The superfamily Blaberoidea, in which viviparity evolved, shows
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Annals of the Entomological Society of America, 1968
The evolution of ovoviviparity and viviparity in the Blattaria necessitated a change from a hard rigid ootheca that was dropped shortly after its formation, to a soft, flexible, reduced egg case which was retracted internally into a uterus. Such changes have taken place in the oothecae of the Blaberoidea (Polyphagidae, Blattellidae, Blaberidae), the ...
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The evolution of ovoviviparity and viviparity in the Blattaria necessitated a change from a hard rigid ootheca that was dropped shortly after its formation, to a soft, flexible, reduced egg case which was retracted internally into a uterus. Such changes have taken place in the oothecae of the Blaberoidea (Polyphagidae, Blattellidae, Blaberidae), the ...
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Chromosome Numbers of the Blattaria
Annals of the Entomological Society of America, 1970The numbers of chromosomes of 106 species (62 genera) of Blattaria are given; the numbers for 84 species are reported for the first time. The numbers vary greatly in the suborder and range from n ♀ = 8 to n ♀ = 40. Differences in number occur also between species of a given genus. The most frequently occurring haploid number is 19.
Samuel Cohen, Louis M. Roth
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Interspecific Mating in Blattaria
Annals of the Entomological Society of America, 1970No matings occurred in the laboratory between species of 4 genera (Blaberus, Byrsotria, Eublaberus , and Archimandrita) of Blaberinae. Although several matings took place among 4 species of Blaberus , and among 5 species of Blattella , mechanisms responsible for reproductive isolation were quite effective among the above genera of Blaberinae, 4 species
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The ocellus of the cockroach, Periplaneta americana (Blattariae)
Cell And Tissue Research, 1976The ocelli of Periplaneta americana were studied by light and electron microscopy. The view that the ocellus of the cockroach represents a degenerated structure can no longer be supported. All organelles necessary for function are present. The club-shaped retinular cells lie homogeneously distributed in the cupule of the ocellus.
G, Weber, M, Renner
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Blattaria of Colombia: List and distribution of genera
Zootaxa, 2006Few scientists have dedicated themselves to the study of Colombia’s cockroach diversity. As a result, there are large gaps in the taxonomic knowledge of Colombian cockroach fauna that make species identification difficult and little information is available on their geographic distribution.
Vélez, Andrés +2 more
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Control of oötheca formation and oviposition in Blattaria
Journal of Insect Physiology, 1974The brain is not required for oviposition in five species of Blaberidae; the control centre for formation, 90° counterclockwise rotation, and retraction of the ootheca lies in the abdomen. A similar centre controls ootheca formation and 90° clockwise rotation in Blattella germanica (Blattellidae).
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