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Robert W Sites - One of the best experts on this subject based on the ideXlab platform.
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Revision of Limnocoris (Heteroptera: Nepomorpha: Naucoridae) of North America.
Zootaxa, 2019Co-Authors: Higor D. D. Rodrigues, Robert W SitesAbstract:The North American species of Limnocoris are revised and total 13 species after the present study. Four new species are described and illustrated: L. chaetocarinatus n. sp. from Costa Rica, Panama, and Colombia; L. major n. sp. and L. nanus n. sp. from Costa Rica and Panama; and L. zacki n. sp. from Mexico and Guatemala. Further, supplemental descriptions are provided for the previously described species. The following synonymies are proposed, with junior synonyms in brackets: L. insularis Champion [L. alcorni La Rivers n. syn.], L. pygmaeus La Rivers [L. solenoides La Rivers n. syn.], and L. signoreti Montandon [L. brailovskyi La Rivers n. syn., L. laucki La Rivers n. syn., L. stangei La Rivers n. syn.]. A lectotype is designated for L. signoreti. Limnocoris profundus (Say) is considered a nomen dubium because no type specimens have been found and the original description is insufficient to establish its identity. An illustrated taxonomic key, distribution maps, and a discussion of the characters (putative synapomorphies) not previously mentioned in the literature also are presented.
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Descriptions of four new species of the Ambrysus signoreti Stål species complex (Heteroptera: Nepomorpha: Naucoridae.
Zootaxa, 2019Co-Authors: Daniel Reynoso-velasco, Robert W SitesAbstract:The genus Ambrysus Stal is the most species rich genus of Naucoridae. Multiple species groups in the genus have been proposed, including the North American Ambrysus signoreti Stal complex. Four new species belonging to the A . signoreti complex are described and illustrated: three from Mexico ( Ambrysus brailovskyi Reynoso & Sites n. sp. , A. henryi Reynoso & Sites n. sp. , A. schuhi Reynoso & Sites n. sp. ) and one from Mexico and Guatemala ( A. sitesi Reynoso n. sp. ), bringing the total number of described species of Ambrysus to 97.
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Taxonomic overview of the family Naucoridae (Heteroptera: Nepomorpha) in Mexico
2019Co-Authors: Daniel Reynoso Velasco, Robert W SitesAbstract:Se resume el conocimiento taxonomico de la fauna Mexicana de la familia Naucoridae, el cual es bastante completo debido a estudios recientes. Actualmente se encuentran registradas para el pais 71 species pertenecientes a seis generos y cuatro subfamilias. La riqueza de especies esta distribuida en las subfamilias Cryphocricinae: Ambrysus Stal (53), Cataractocoris Usinger (3), Cryphocricos Signoret (2); Laccocorinae: Interocoris La Rivers (1); Limnocorinae: Limnocoris Stal (10); and Naucorinae: Pelocoris Stal (2). Trabajos recientes han enfocado su atencion en el estudio del genero Ambrysus. Adicionalmente se requieren estudios de los generos Cryphocricos y Pelocoris, mientras que la revision taxonomica del genero Limnocoris esta cerca de ser finalizada. Se proporciona una clave para la identificacion de las subfamilias y generos de Naucoridae de Mexico.
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Revision of the Ambrysus pulchellus Montandon species complex (Heteroptera: Nepomorpha: Naucoridae).
Zootaxa, 2018Co-Authors: Daniel Reynoso-velasco, Robert W SitesAbstract:The Ambrysus pulchellus Montandon species complex is revised and includes A. buenoi Usinger, A. californicus Montandon, A. pulchellus Montandon, and A. vanduzeei Usinger. The unifying features among species in this complex are related to the morphology of the male phallosoma and the medial lobes of abdominal tergum VIII. The species in this complex are diagnosed and a key for identification is presented. The subspecies A. pulchellus nitidulus Montandon and A. pulchellus pallidulus Montandon are proposed as junior synonyms of A. pulchellus Montandon. Ambrysus pulchellus is newly recorded from Honduras, Nicaragua, and Panama in Central America. This species has the widest distribution in the subgenus Ambrysus Stal and includes parts of the Nearctic and Neotropical biogeographic realms. Ambrysus buenoi is distributed in Mexico and the United States, whereas A. californicus is endemic to the coastal ranges of California in the United States and A. vanduzeei to the Baja California Peninsula in Mexico.
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The Naucoridae (Heteroptera: Nepomorpha) of Belize
Aquatic Insects, 2018Co-Authors: Robert W Sites, Rachael Carrie, William D. ShepardAbstract:ABSTRACTFew regional faunistic treatments of aquatic Heteroptera exist for Mesoamerica. Records given here are the result of three extensive, coincident projects, each generating many specimens of ...
Richard W. Merritt - One of the best experts on this subject based on the ideXlab platform.
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Semi-Aquatic Hemiptera That Have Tested Positive for M. ulcerans
2013Co-Authors: Paul D. R Johnson, Pamela L. C. Small, Richard W. Merritt, Timothy Stinear, Gerd Pluschke, Francoise Portaels, Kris Huygen, John A Hayman, Kingsley AsieduAbstract:The top row is Macrocoris sp., 1.0 centimeter in body length (Family Naucoridae), and the bottom row is Appasus sp., about 2.5 centimeters in body length (Family Belastomatidae). The ventral and dorsal views are in the left and right panels, respectively.
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aquatic invertebrates as unlikely vectors of buruli ulcer disease
Emerging Infectious Diseases, 2008Co-Authors: Eric M Benbow, Heather Williamson, Ryan Kimbirauskas, Mollie D. Mcintosh, Rebecca E. Kolar, Charles Quaye, Felix Akpabey, Daniel A. Boakye, Pamela L. C. Small, Richard W. MerrittAbstract:Buruli ulcer is a necrotizing skin disease caused by Mycobacterium ulcerans and associated with exposure to aquatic habitats. To assess possible transmission of M. ulcerans by aquatic biting insects, we conducted a field examination of biting water bugs (Hemiptera: Naucoridae, Belostomatidae, Nepidae) in 15 disease-endemic and 12 non–disease-endemic areas of Ghana, Africa. From collections of 22,832 invertebrates, we compared composition, abundance, and associated M. ulcerans positivity among sites. Biting hemipterans were rare and represented a small percentage (usually <2%) of invertebrate communities. No significant differences were found in hemipteran abundance or pathogen positivity between disease-endemic and non–disease-endemic sites, and between abundance of biting hemipterans and M. ulcerans positivity. Therefore, although infection through insect bites is possible, little field evidence supports the assumption that biting hemipterans are primary vectors of M. ulcerans.
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Aquatic invertebrates as unlikely vectors of Buruli ulcer disease.
Emerging infectious diseases, 2008Co-Authors: M. Eric Benbow, Heather Williamson, Ryan Kimbirauskas, Mollie D. Mcintosh, Rebecca E. Kolar, Charles Quaye, Felix Akpabey, Daniel A. Boakye, Pamela L. C. Small, Richard W. MerrittAbstract:Buruli ulcer is a necrotizing skin disease caused by Mycobacterium ulcerans and associated with exposure to aquatic habitats. To assess possible transmission of M. ulcerans by aquatic biting insects, we conducted a field examination of biting water bugs (Hemiptera: Naucoridae, Belostomatidae, Nepidae) in 15 disease-endemic and 12 non–disease-endemic areas of Ghana, Africa. From collections of 22,832 invertebrates, we compared composition, abundance, and associated M. ulcerans positivity among sites. Biting hemipterans were rare and represented a small percentage (usually
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unraveling an emerging disease associated with disturbed aquatic environments the case of buruli ulcer
Frontiers in Ecology and the Environment, 2005Co-Authors: Richard W. Merritt, Eric M Benbow, Pamela L. C. SmallAbstract:Buruli ulcer (Mycobacterium ulcerans infection) is an emerging disease of developing tropical and subtropical countries. This environmental mycobacterium causes severe morbidity in communities associated with rivers and standing water bodies (particularly those created as a result of human environmental disturbance such as deforestation and agriculture) and subsequent water quality changes. Neither the reservoir nor the mode of transmission is known, but data from laboratory studies suggest that biting aquatic insects may be involved. M ulcerans has been shown to colonize and grow within specific water bugs (Naucoridae), which then transmit M ulcerans to mice through their bites. PCR evidence suggests that the mycobacterium is present in water, biofilms of aquatic plants, detritus, invertebrates, and fish; however, systematic ecological studies that would provide a more comprehensive understanding of M ulcerans distribution in the environment have been lacking. Several hypotheses are explored in relation ...
Pamela L. C. Small - One of the best experts on this subject based on the ideXlab platform.
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Semi-Aquatic Hemiptera That Have Tested Positive for M. ulcerans
2013Co-Authors: Paul D. R Johnson, Pamela L. C. Small, Richard W. Merritt, Timothy Stinear, Gerd Pluschke, Francoise Portaels, Kris Huygen, John A Hayman, Kingsley AsieduAbstract:The top row is Macrocoris sp., 1.0 centimeter in body length (Family Naucoridae), and the bottom row is Appasus sp., about 2.5 centimeters in body length (Family Belastomatidae). The ventral and dorsal views are in the left and right panels, respectively.
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aquatic invertebrates as unlikely vectors of buruli ulcer disease
Emerging Infectious Diseases, 2008Co-Authors: Eric M Benbow, Heather Williamson, Ryan Kimbirauskas, Mollie D. Mcintosh, Rebecca E. Kolar, Charles Quaye, Felix Akpabey, Daniel A. Boakye, Pamela L. C. Small, Richard W. MerrittAbstract:Buruli ulcer is a necrotizing skin disease caused by Mycobacterium ulcerans and associated with exposure to aquatic habitats. To assess possible transmission of M. ulcerans by aquatic biting insects, we conducted a field examination of biting water bugs (Hemiptera: Naucoridae, Belostomatidae, Nepidae) in 15 disease-endemic and 12 non–disease-endemic areas of Ghana, Africa. From collections of 22,832 invertebrates, we compared composition, abundance, and associated M. ulcerans positivity among sites. Biting hemipterans were rare and represented a small percentage (usually <2%) of invertebrate communities. No significant differences were found in hemipteran abundance or pathogen positivity between disease-endemic and non–disease-endemic sites, and between abundance of biting hemipterans and M. ulcerans positivity. Therefore, although infection through insect bites is possible, little field evidence supports the assumption that biting hemipterans are primary vectors of M. ulcerans.
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Aquatic invertebrates as unlikely vectors of Buruli ulcer disease.
Emerging infectious diseases, 2008Co-Authors: M. Eric Benbow, Heather Williamson, Ryan Kimbirauskas, Mollie D. Mcintosh, Rebecca E. Kolar, Charles Quaye, Felix Akpabey, Daniel A. Boakye, Pamela L. C. Small, Richard W. MerrittAbstract:Buruli ulcer is a necrotizing skin disease caused by Mycobacterium ulcerans and associated with exposure to aquatic habitats. To assess possible transmission of M. ulcerans by aquatic biting insects, we conducted a field examination of biting water bugs (Hemiptera: Naucoridae, Belostomatidae, Nepidae) in 15 disease-endemic and 12 non–disease-endemic areas of Ghana, Africa. From collections of 22,832 invertebrates, we compared composition, abundance, and associated M. ulcerans positivity among sites. Biting hemipterans were rare and represented a small percentage (usually
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unraveling an emerging disease associated with disturbed aquatic environments the case of buruli ulcer
Frontiers in Ecology and the Environment, 2005Co-Authors: Richard W. Merritt, Eric M Benbow, Pamela L. C. SmallAbstract:Buruli ulcer (Mycobacterium ulcerans infection) is an emerging disease of developing tropical and subtropical countries. This environmental mycobacterium causes severe morbidity in communities associated with rivers and standing water bodies (particularly those created as a result of human environmental disturbance such as deforestation and agriculture) and subsequent water quality changes. Neither the reservoir nor the mode of transmission is known, but data from laboratory studies suggest that biting aquatic insects may be involved. M ulcerans has been shown to colonize and grow within specific water bugs (Naucoridae), which then transmit M ulcerans to mice through their bites. PCR evidence suggests that the mycobacterium is present in water, biofilms of aquatic plants, detritus, invertebrates, and fish; however, systematic ecological studies that would provide a more comprehensive understanding of M ulcerans distribution in the environment have been lacking. Several hypotheses are explored in relation ...
M S Foto - One of the best experts on this subject based on the ideXlab platform.
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Morphologie et abondance des stades de développement d’ Ilyocoris cimicoïdes Linné 1758 (Heteroptera : Naucoridae) dans un lac anthropisé en zone tropicale (Cameroun)
Journal of Applied Biosciences, 2014Co-Authors: G A Ajeagah, S Kekeunou, P E Njiawouo, M S FotoAbstract:Objectifs : Une etude conduite au laboratoire de Zoologie et de Biologie Generale de l’Universite de Yaounde I a porte sur l’ecologie de la punaise aquatique Ilyocoris cimicoides Linne 1758 (Heteroptera : Naucoridae) prelevee dans le lac d’Obili (Yaounde, Cameroun). Methodologie et resultats : L’analyse physico-chimique montre que ce lac est dans un etat eutrophe a hypereutrophe et ses eaux sont fortement chargees en matiere organique. Les observations morphologiques et l’illustration des stades de developpement ainsi que l’etude de leurs fluctuations numeriques montrent que I. cimicoides a six stades post-embryonnaires parmi lesquels cinq sont larvaires. La taille des individus augmente de la larve de 1er stade jusqu’au stade adulte. Les stades larvaires d’ I. cimicoides se distinguent les uns des autres par la presence ou l’absence du pterotheque, la forme de la marge posterieure du mesotergum et la taille relative du pterotheque par rapport a la base du mesotergum. Conclusions : L’abondance des stades de developpement d’ I.cimicoides est influencee par la saisonnalite et l’evolution de certaines variables physico-chimiques. Les larves pullulent pendant la saison seche et les oeufs et adultes pendant la saison des pluies. Mots cles : Pollution aquatique, morphologie, developpement, Ilyocoris cimicoides. O bjectives : A study conducted at the Laboratory of Zoology and General Biology, University of Yaounde I focused on the ecology of aquatic bug Ilyocoris cimicoides Linnaeus 1758 (Heteroptera : Naucoridae) taken from Lake Obili (Yaounde, Cameroon). Methodology and Results : The physico-chemical analysis showed that this lake is in a eutrophic state and its waters are heavily loaded with organic matter. Morphological observations and illustration stages of development and the study of their digital fluctuations show that I. cimicoides , has six post-embryonic stages of which five are breeding. The sizes of individuals increase the first stage larva to adult. Larval stages of I.cimicoides are distinguished from each other by the presence or absence of pterotheque, the shape of the posterior margin and mesotergum pterotheque relative size with respect to the base of mesotergum. Conclusions : Abundance stages of development I. cimicoides is influenced by seasonality and the evolution of certain physico-chemical variables. Larvae swim in the dry season and eggs and adults during the rainy season. Keywords : Water Pollution, morphology, development, Ilyocoris cimicoides,
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morphologie et abondance des stades de developpement d ilyocoris cimicoides linne 1758 heteroptera Naucoridae dans un lac anthropise en zone tropicale cameroun
Journal of Applied Biosciences, 2014Co-Authors: G A Ajeagah, S Kekeunou, P E Njiawouo, M S FotoAbstract:Objectifs : Une etude conduite au laboratoire de Zoologie et de Biologie Generale de l’Universite de Yaounde I a porte sur l’ecologie de la punaise aquatique Ilyocoris cimicoides Linne 1758 (Heteroptera : Naucoridae) prelevee dans le lac d’Obili (Yaounde, Cameroun). Methodologie et resultats : L’analyse physico-chimique montre que ce lac est dans un etat eutrophe a hypereutrophe et ses eaux sont fortement chargees en matiere organique. Les observations morphologiques et l’illustration des stades de developpement ainsi que l’etude de leurs fluctuations numeriques montrent que I. cimicoides a six stades post-embryonnaires parmi lesquels cinq sont larvaires. La taille des individus augmente de la larve de 1er stade jusqu’au stade adulte. Les stades larvaires d’ I. cimicoides se distinguent les uns des autres par la presence ou l’absence du pterotheque, la forme de la marge posterieure du mesotergum et la taille relative du pterotheque par rapport a la base du mesotergum. Conclusions : L’abondance des stades de developpement d’ I.cimicoides est influencee par la saisonnalite et l’evolution de certaines variables physico-chimiques. Les larves pullulent pendant la saison seche et les oeufs et adultes pendant la saison des pluies. Mots cles : Pollution aquatique, morphologie, developpement, Ilyocoris cimicoides. O bjectives : A study conducted at the Laboratory of Zoology and General Biology, University of Yaounde I focused on the ecology of aquatic bug Ilyocoris cimicoides Linnaeus 1758 (Heteroptera : Naucoridae) taken from Lake Obili (Yaounde, Cameroon). Methodology and Results : The physico-chemical analysis showed that this lake is in a eutrophic state and its waters are heavily loaded with organic matter. Morphological observations and illustration stages of development and the study of their digital fluctuations show that I. cimicoides , has six post-embryonic stages of which five are breeding. The sizes of individuals increase the first stage larva to adult. Larval stages of I.cimicoides are distinguished from each other by the presence or absence of pterotheque, the shape of the posterior margin and mesotergum pterotheque relative size with respect to the base of mesotergum. Conclusions : Abundance stages of development I. cimicoides is influenced by seasonality and the evolution of certain physico-chemical variables. Larvae swim in the dry season and eggs and adults during the rainy season. Keywords : Water Pollution, morphology, development, Ilyocoris cimicoides,
G A Ajeagah - One of the best experts on this subject based on the ideXlab platform.
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Morphologie et abondance des stades de développement d’ Ilyocoris cimicoïdes Linné 1758 (Heteroptera : Naucoridae) dans un lac anthropisé en zone tropicale (Cameroun)
Journal of Applied Biosciences, 2014Co-Authors: G A Ajeagah, S Kekeunou, P E Njiawouo, M S FotoAbstract:Objectifs : Une etude conduite au laboratoire de Zoologie et de Biologie Generale de l’Universite de Yaounde I a porte sur l’ecologie de la punaise aquatique Ilyocoris cimicoides Linne 1758 (Heteroptera : Naucoridae) prelevee dans le lac d’Obili (Yaounde, Cameroun). Methodologie et resultats : L’analyse physico-chimique montre que ce lac est dans un etat eutrophe a hypereutrophe et ses eaux sont fortement chargees en matiere organique. Les observations morphologiques et l’illustration des stades de developpement ainsi que l’etude de leurs fluctuations numeriques montrent que I. cimicoides a six stades post-embryonnaires parmi lesquels cinq sont larvaires. La taille des individus augmente de la larve de 1er stade jusqu’au stade adulte. Les stades larvaires d’ I. cimicoides se distinguent les uns des autres par la presence ou l’absence du pterotheque, la forme de la marge posterieure du mesotergum et la taille relative du pterotheque par rapport a la base du mesotergum. Conclusions : L’abondance des stades de developpement d’ I.cimicoides est influencee par la saisonnalite et l’evolution de certaines variables physico-chimiques. Les larves pullulent pendant la saison seche et les oeufs et adultes pendant la saison des pluies. Mots cles : Pollution aquatique, morphologie, developpement, Ilyocoris cimicoides. O bjectives : A study conducted at the Laboratory of Zoology and General Biology, University of Yaounde I focused on the ecology of aquatic bug Ilyocoris cimicoides Linnaeus 1758 (Heteroptera : Naucoridae) taken from Lake Obili (Yaounde, Cameroon). Methodology and Results : The physico-chemical analysis showed that this lake is in a eutrophic state and its waters are heavily loaded with organic matter. Morphological observations and illustration stages of development and the study of their digital fluctuations show that I. cimicoides , has six post-embryonic stages of which five are breeding. The sizes of individuals increase the first stage larva to adult. Larval stages of I.cimicoides are distinguished from each other by the presence or absence of pterotheque, the shape of the posterior margin and mesotergum pterotheque relative size with respect to the base of mesotergum. Conclusions : Abundance stages of development I. cimicoides is influenced by seasonality and the evolution of certain physico-chemical variables. Larvae swim in the dry season and eggs and adults during the rainy season. Keywords : Water Pollution, morphology, development, Ilyocoris cimicoides,
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morphologie et abondance des stades de developpement d ilyocoris cimicoides linne 1758 heteroptera Naucoridae dans un lac anthropise en zone tropicale cameroun
Journal of Applied Biosciences, 2014Co-Authors: G A Ajeagah, S Kekeunou, P E Njiawouo, M S FotoAbstract:Objectifs : Une etude conduite au laboratoire de Zoologie et de Biologie Generale de l’Universite de Yaounde I a porte sur l’ecologie de la punaise aquatique Ilyocoris cimicoides Linne 1758 (Heteroptera : Naucoridae) prelevee dans le lac d’Obili (Yaounde, Cameroun). Methodologie et resultats : L’analyse physico-chimique montre que ce lac est dans un etat eutrophe a hypereutrophe et ses eaux sont fortement chargees en matiere organique. Les observations morphologiques et l’illustration des stades de developpement ainsi que l’etude de leurs fluctuations numeriques montrent que I. cimicoides a six stades post-embryonnaires parmi lesquels cinq sont larvaires. La taille des individus augmente de la larve de 1er stade jusqu’au stade adulte. Les stades larvaires d’ I. cimicoides se distinguent les uns des autres par la presence ou l’absence du pterotheque, la forme de la marge posterieure du mesotergum et la taille relative du pterotheque par rapport a la base du mesotergum. Conclusions : L’abondance des stades de developpement d’ I.cimicoides est influencee par la saisonnalite et l’evolution de certaines variables physico-chimiques. Les larves pullulent pendant la saison seche et les oeufs et adultes pendant la saison des pluies. Mots cles : Pollution aquatique, morphologie, developpement, Ilyocoris cimicoides. O bjectives : A study conducted at the Laboratory of Zoology and General Biology, University of Yaounde I focused on the ecology of aquatic bug Ilyocoris cimicoides Linnaeus 1758 (Heteroptera : Naucoridae) taken from Lake Obili (Yaounde, Cameroon). Methodology and Results : The physico-chemical analysis showed that this lake is in a eutrophic state and its waters are heavily loaded with organic matter. Morphological observations and illustration stages of development and the study of their digital fluctuations show that I. cimicoides , has six post-embryonic stages of which five are breeding. The sizes of individuals increase the first stage larva to adult. Larval stages of I.cimicoides are distinguished from each other by the presence or absence of pterotheque, the shape of the posterior margin and mesotergum pterotheque relative size with respect to the base of mesotergum. Conclusions : Abundance stages of development I. cimicoides is influenced by seasonality and the evolution of certain physico-chemical variables. Larvae swim in the dry season and eggs and adults during the rainy season. Keywords : Water Pollution, morphology, development, Ilyocoris cimicoides,
