Central projections of first-order ocellar interneurons in two orthopteroid insects Acheta domesticus and Periplaneta americana

1984 ◽  
Vol 236 (1) ◽  
pp. 133-146 ◽  
Author(s):  
MargaretA. Koontz ◽  
JohnS. Edwards
Keyword(s):  
Periplaneta Americana ◽  
Acheta Domesticus ◽  
Central Projections ◽  
First Order ◽  
Orthopteroid Insects

The Orthopteroid insects of Norfolk Island, with descriptions and records of some related species from Lord Howe Island, South Pacific

1988 ◽  
Vol 2 (8) ◽  
pp. 1013 ◽  
Author(s):  
DCF Rentz
Keyword(s):  
National Parks ◽  
Related Species ◽  
Periplaneta Americana ◽  
South East Asia ◽  
Dominant Group ◽  
Lord Howe Island ◽  
Norfolk Island ◽  
Wild Olive ◽  
Orthopteroid Insects ◽  
Orthopteran Species

The Orthoptera and Blattodea of Norfolk I. and adjacent Philip I. are discussed as a result of two recent expeditions sponsored by the Australian National Parks and Wildlife Service and CSIRO. The origins, affinities, taxonomy and ecology of species is presented. Relevant notes and descriptions of related species from Lord Howe I. are also included. Twenty species of Orthoptera are known from Norfolk I. and Philip I. Crickets are the dominant group (10 species) probably because they oviposit in plant tissue which is readily dispersed overseas. Ten orthopteran species have their origins in mainland Australia. Three are definitely of New Caledonian origin; the remainder are from south-east Asia. Fifty-five per cent of species are endemic and 72% of these are flightless. Introduced wild olive on Philip I. is considered important in pro-viding litter and cover in which a number of endemic species survive on this otherwise ecologically devastated landscape. Seven species are described as new: Phisis tardipes, sp. nov.; Austrosalomona personafrons, gen. et sp. nov.; A. zentae (Lord Howe), gen. et sp. nov.; Caedicia gracilis, sp. nov.; C. araucariae, sp. nov.; C. noctivaga, sp. nov.; C. mesochides (Lord Howe), sp. nov. Eight species of Blattodea (cockroaches) are recorded from the islands. Only three are considered native, the others have been introduced through commerce. Evidence is presented suggesting that Periplaneta americana (L.), present on Norfolk but not on Philip, has outcompeted and eliminated a native cricket on Norfolk; the cricket is present and common in similar habitats on Philip I. No new species are described.

Peripheral control of responsiveness to auditory stimuli in giant fibres of crickets and cockroaches

1978 ◽  
Vol 72 (1) ◽  
pp. 153-164
Author(s):  
N. Orida ◽  
R. K. Josephson
Keyword(s):  
Nerve Cord ◽  
Ventral Nerve Cord ◽  
Periplaneta Americana ◽  
Acheta Domesticus ◽  
Auditory Stimuli ◽  
Descending Inhibition ◽  
Descending Influences ◽  
Giant Fibres ◽  
Recording Electrodes

Auditory stimuli initiate ascending activity in large fibres of the ventral nerve cord of the cricket, Acheta domesticus, and the cockroach, Periplaneta americana. This auditory responsiveness is reduced during locomotion. An earlier study concluded that the depression of responsiveness was mediated by descending inhibition. However, the auditory responsiveness is reduced during locomotion even after section of the ventral nerve cord anterior to the abdominal recording electrodes. Further, auditory responsiveness of isolated abdomens attached to intact animals is inhibited during locomotion of their hosts. Laminar wind streams over the cerci depress responsiveness to sound, but only at velocities markedly higher than those encountered by freely walking animals. Although the exact mechanism is not known, the depressed auditory responsiveness can occur independently of any descending influences.

Dual systems for all: Higher-order, role-based relational reasoning as a uniquely derived feature of human cognition

2019 ◽  
Vol 42 ◽  
Author(s):  
Daniel J. Povinelli ◽  
Gabrielle C. Glorioso ◽  
Shannon L. Kuznar ◽  
Mateja Pavlic
Keyword(s):  
Temporal Reasoning ◽  
Higher Order ◽  
Important Case ◽  
Human Cognition ◽  
Relational Reasoning ◽  
Dual Systems ◽  
First Order ◽  
Reasoning System ◽  
Role Based

Abstract Hoerl and McCormack demonstrate that although animals possess a sophisticated temporal updating system, there is no evidence that they also possess a temporal reasoning system. This important case study is directly related to the broader claim that although animals are manifestly capable of first-order (perceptually-based) relational reasoning, they lack the capacity for higher-order, role-based relational reasoning. We argue this distinction applies to all domains of cognition.

Stochasting modeling of planetary ring systems

1984 ◽  
Vol 75 ◽  
pp. 461-469 ◽  
Author(s):  
Robert W. Hart
Keyword(s):  
Maximum Entropy ◽  
Ring System ◽  
The Sun ◽  
Ultimate State ◽  
Interparticle Interactions ◽  
Ring Systems ◽  
First Order ◽  
Planetary Ring ◽  
Insight Into

ABSTRACTThis paper models maximum entropy configurations of idealized gravitational ring systems. Such configurations are of interest because systems generally evolve toward an ultimate state of maximum randomness. For simplicity, attention is confined to ultimate states for which interparticle interactions are no longer of first order importance. The planets, in their orbits about the sun, are one example of such a ring system. The extent to which the present approximation yields insight into ring systems such as Saturn's is explored briefly.

Electron investigations of rhabdovirus-like particles in mexican bean beetles and crickets

1978 ◽  
Vol 36 (2) ◽  
pp. 378-379
Author(s):  
J. R. Adams ◽  
G. J Tompkins ◽  
A. M. Heimpel ◽  
E. Dougherty
Keyword(s):  
Biological Control ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Developmental Stages ◽  
Management Program ◽  
Acheta Domesticus ◽  
Epilachna Varivestis ◽  
House Cricket ◽  
Similar Morphology ◽  
Bean Beetle

As part of a continual search for potential pathogens of insects for use in biological control or on an integrated pest management program, two bacilliform virus-like particles (VLP) of similar morphology have been found in the Mexican bean beetle Epilachna varivestis Mulsant and the house cricket, Acheta domesticus (L. ).Tissues of diseased larvae and adults of E. varivestis and all developmental stages of A. domesticus were fixed according to procedures previously described. While the bean beetles displayed no external symptoms, the diseased crickets displayed a twitching and shaking of the metathoracic legs and a lowered rate of activity.Examinations of larvae and adult Mexican bean beetles collected in the field in 1976 and 1977 in Maryland and field collected specimens brought into the lab in the fall and reared through several generations revealed that specimens from each collection contained vesicles in the cytoplasm of the midgut filled with hundreds of these VLP's which were enveloped and measured approximately 16-25 nm x 55-110 nm, the shorter VLP's generally having the greater width (Fig. 1).

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