The Canadian Entomologist 130: 893 -897 (1998) A detailed description and illustrations of the la... more The Canadian Entomologist 130: 893 -897 (1998) A detailed description and illustrations of the larva of Remartinia secreta (Calvert) are provided. The main features that distinguish the larva of this species are dark brown coloration; prementum 0.25 times longer than its widest part, with a dorsal row of small spiniform setae close to the lateral margins; length of the lateral spine on abdominal segment six 0.4-0.5 mm; lateral valvae of female gonapophyses shorter than central ones; and female epiproct longer than cerci. Larvae were found living in a lagoon densely covered by aquatic phanerogams such as Eichhornia sp. (Pontedereaceae) and Tvpha sp. (Thyphaceae). Larva of R. secreta is compared to that of Remartinia luteipennis florida (Hagen), its only sympatric congener. Novelo-Gutiérrez, R. 1998. Déscription de la Iarve de Remartinia secreta et notes sur la larve de Remartinia luteipennis .f7orida (Odonata : Aeshnidae). The Canadian Entomologist 130 : 893-897. Résumé Une déscription détaillée et illustrée des larves de Remartinia secreta (Calvert) a été faite. Elles ont été récoitées dans une lagune couverte par des phanérogames aquati ques tels que Eichhornia sp. (Pontedereaceae) et Typha sp. (Typhaceae). Les princi pales caractéristiques pour les identifier sont coloration café foncé; prémentum 0,25 fois plus allongé que sa plus large partie, avec une rangée dorsale de fines soies épi niformes pres des marges latérales; épine latérale du 6 ieme segment abdominal de 0,4-0,5 mm de longeur; et chez les femelles la gonapophyse a des valves latérales plus courtes que les centrales et l'épiproctum est plus long que les cerci. Les carac téristiques des larves de cette espece ont eté comparées avec celles de Remartinia luteipennis florida (Hagen), son congénere sympatrique unique.
The larva of Aeshna williamsoniana Calvert, 1905 is described in detail, illustrated, and compare... more The larva of Aeshna williamsoniana Calvert, 1905 is described in detail, illustrated, and compared with other larvae of the genus and family. It is distinguished from its congeners by its granular integument, body mostly lacking hairlike setae, cerci with a row of spiniform setae along the lateroexternal margins, and dorsomedial margin of female epiproct with a row of spiniform setae. It does not particularly resemble any other larva of Aeshna or related genera described to date. The larval habitat is described for the first time.
Odonate nymphs are important predators of the immature aquatic stages of mosquitoes. Populations ... more Odonate nymphs are important predators of the immature aquatic stages of mosquitoes. Populations of the malaria vector Anopheles pseudopunctipennis Theobald (Diptera: Culicidae) can be efÞciently reduced by extraction of Þlamentous algae from river pools in southern Mexico. Here, we examined the inßuence of this intervention on the diversity of odonates associated with mosquito breeding pools after annual extractions of algae from river pools in a 3-km section of the Coatán River, over a period of 2 yr. Odonate sampling was performed at monthly intervals in control and treated sections of the river for 4 Ð5 mo after extraction in both years and before extraction in 1 yr. In total, 16 species, 10 genera, and 6 families of odonates were collected. Shannon diversity index values declined signiÞcantly during a period of 1 mo in 2001 and Ͼ5 mo in 2002. However, the abundance of odonates captured was not affected by algal extraction. In contrast, year-to-year variation in the diversity and abundance of the odonate community was strongly inßuenced by precipitation and river volume. Despite the importance of algae in river ecology, we conclude that the mosquito control intervention resulted in minimal impact on the odonate community in southern Mexico.
Abstract. 1. Assessing species richness (SR) and diversity along environmental gradients is impo... more Abstract. 1. Assessing species richness (SR) and diversity along environmental gradients is important to see whether abiotic differences alter patterns of species distribution and composition.2. We examined distributions of odonate SR, average taxonomic distinctness (ATD) and functional diversity (FD) (using the Shannon Index on proportions of plant-dependent and non-dependent species) with elevation and slope provided from an exploratory survey along a transect in the Sierra de Coalcomán Mountains, Michoacán State, Mexico. Adults were collected along both sides of a 500 m stream segment for 6 h day−1 site−1 in each of eight sites, and these species lists were complemented by collecting mature larvae.3. Species richness and FD declined with elevation among windward sites, while ATD increased. Among leeward sites, SR peaked at mid-elevation, and there was no trend for FD or ATD with elevation. Leeward sites were similar in species composition, whereas windward sites were dissimilar. Slope was correlated with elevation among windward sites, and influenced most variables, but not among leeward sites. FD was negatively correlated with ATD among sites along both aspects. Mean values of SR, ATD and FD between aspects were similar.4. The Energy-Richness Hypothesis best explained the species distributions along the windward aspect. Local abiotic influences appeared more important in community assembly among windward sites. Among leeward sites, the potential for Mid-Domain and Rapoport Effects suggest interspecies interactions control community assembly; providing greater potential for expansion of species elevational ranges, and an increase in range expansion of alien and non-endemic species along this aspect.
A detailed description and illustrations of the larva of Telebasis digiticollis Calvert, 1902 are... more A detailed description and illustrations of the larva of Telebasis digiticollis Calvert, 1902 are provided. A comparison with other larvae of the genus is made. Telebasis digiticollis is distinguished by I premental seta, 6-7 setae on the labial palp, a well-developed and convex ligula, 7-8 spiniform setae on the lateral margins of the prementum, and forceps-like mal e gonapophyses. The larva of T. digiticollis is more like that of T. boomsmae Garrison, 1994 than like other larvae of the genus. Larvae were found living in a lagoon densely covered by aquatic phanerogams such as Eichhornia sp. (Pontederiaceae) and Typha sp. (Typhaceae).
Journal of The New York Entomological Society, 2002
Detailed descriptíons and illustrations of the larvae of Erpetogomphus boa Selys and E. cophias S... more Detailed descriptíons and illustrations of the larvae of Erpetogomphus boa Selys and E. cophias Selys, are provided. Comparison with other larvae of the crotalinus-subgroup (sensu Garrison, 1994) ís also inc\uded. Both species are easily separable by general body coloratíon, length and shape of lígula, and delails of male's epiproct.
Odonate diversity in the Coalcomán Mountain Range (CMR), Michoacán State, Mexico, was surveyed, a... more Odonate diversity in the Coalcomán Mountain Range (CMR), Michoacán State, Mexico, was surveyed, and samplings were made during 2 years in eight streams along an altitudinal gradient. Presence–absence data were analyzed using non-parametric and parametric methods. Beta and gamma diversities were estimated using Whittaker’s and Lande’s formulae, respectively. A total of 2,526 adults and 489 larvae were captured, yielding 116 species (γ diversity), 44 genera and 9 families. Five new species were discovered. The genus Argia was the most important contributor to Zygoptera diversity and total richness (γ diversity), yielding 40.4 and 14.7%, respectively. The non-parametric estimator Chao2 provided the closest theoretical estimate of species richness, and Clench’s model fit the data well (R 2 ranged from 99.44 to 99.99) to explain a high proportion of the variance (98.8). We conclude that beta diversity is important at the landscape scale, supporting the hypothesis that Mexico is a beta diverse country. Our results triple the number of known species of Odonata for Michoacán. Given the considerable richness of odonates at local and landscape scales, our results support the proposal of the Coalcomán Mountain Range as a priority area for conservation and related research.
The larva of Argia percellulata is described and figured. It falls into the group of Argia larvae... more The larva of Argia percellulata is described and figured. It falls into the group of Argia larvae with a very prominent ligula and one palpal seta, but differs from its closest relatives by having tibiae usually with two well-defined dark rings, posterior margin of sternite 6 smooth, and posterior margin of sternite 7 smooth medially and with spiniform setae laterally. Larvae were found under cobblestones in open, wide, shallow streams where the water flow was slow to moderate, close to the shoreline within a cloud forest. The larva is compared with four other species apparently closely related.
Resumen. Se presenta un capítulo actualizado sobre Odonata de México. Desde la última actualizaci... more Resumen. Se presenta un capítulo actualizado sobre Odonata de México. Desde la última actualización en 2006, se describieron 5 especies nuevas, se adicionaron 11 registros nuevos y se describieron 14 especies en estado larval. Por tanto, la lista mexicana que aquí se presenta está constituida por un total de 355 especies. Se incluyen comentarios sobre endemismo, especies amenazadas y/o en riesgo.
The Canadian Entomologist 130: 893 -897 (1998) A detailed description and illustrations of the la... more The Canadian Entomologist 130: 893 -897 (1998) A detailed description and illustrations of the larva of Remartinia secreta (Calvert) are provided. The main features that distinguish the larva of this species are dark brown coloration; prementum 0.25 times longer than its widest part, with a dorsal row of small spiniform setae close to the lateral margins; length of the lateral spine on abdominal segment six 0.4-0.5 mm; lateral valvae of female gonapophyses shorter than central ones; and female epiproct longer than cerci. Larvae were found living in a lagoon densely covered by aquatic phanerogams such as Eichhornia sp. (Pontedereaceae) and Tvpha sp. (Thyphaceae). Larva of R. secreta is compared to that of Remartinia luteipennis florida (Hagen), its only sympatric congener. Novelo-Gutiérrez, R. 1998. Déscription de la Iarve de Remartinia secreta et notes sur la larve de Remartinia luteipennis .f7orida (Odonata : Aeshnidae). The Canadian Entomologist 130 : 893-897. Résumé Une déscription détaillée et illustrée des larves de Remartinia secreta (Calvert) a été faite. Elles ont été récoitées dans une lagune couverte par des phanérogames aquati ques tels que Eichhornia sp. (Pontedereaceae) et Typha sp. (Typhaceae). Les princi pales caractéristiques pour les identifier sont coloration café foncé; prémentum 0,25 fois plus allongé que sa plus large partie, avec une rangée dorsale de fines soies épi niformes pres des marges latérales; épine latérale du 6 ieme segment abdominal de 0,4-0,5 mm de longeur; et chez les femelles la gonapophyse a des valves latérales plus courtes que les centrales et l'épiproctum est plus long que les cerci. Les carac téristiques des larves de cette espece ont eté comparées avec celles de Remartinia luteipennis florida (Hagen), son congénere sympatrique unique.
The larva of Aeshna williamsoniana Calvert, 1905 is described in detail, illustrated, and compare... more The larva of Aeshna williamsoniana Calvert, 1905 is described in detail, illustrated, and compared with other larvae of the genus and family. It is distinguished from its congeners by its granular integument, body mostly lacking hairlike setae, cerci with a row of spiniform setae along the lateroexternal margins, and dorsomedial margin of female epiproct with a row of spiniform setae. It does not particularly resemble any other larva of Aeshna or related genera described to date. The larval habitat is described for the first time.
Odonate nymphs are important predators of the immature aquatic stages of mosquitoes. Populations ... more Odonate nymphs are important predators of the immature aquatic stages of mosquitoes. Populations of the malaria vector Anopheles pseudopunctipennis Theobald (Diptera: Culicidae) can be efÞciently reduced by extraction of Þlamentous algae from river pools in southern Mexico. Here, we examined the inßuence of this intervention on the diversity of odonates associated with mosquito breeding pools after annual extractions of algae from river pools in a 3-km section of the Coatán River, over a period of 2 yr. Odonate sampling was performed at monthly intervals in control and treated sections of the river for 4 Ð5 mo after extraction in both years and before extraction in 1 yr. In total, 16 species, 10 genera, and 6 families of odonates were collected. Shannon diversity index values declined signiÞcantly during a period of 1 mo in 2001 and Ͼ5 mo in 2002. However, the abundance of odonates captured was not affected by algal extraction. In contrast, year-to-year variation in the diversity and abundance of the odonate community was strongly inßuenced by precipitation and river volume. Despite the importance of algae in river ecology, we conclude that the mosquito control intervention resulted in minimal impact on the odonate community in southern Mexico.
Abstract. 1. Assessing species richness (SR) and diversity along environmental gradients is impo... more Abstract. 1. Assessing species richness (SR) and diversity along environmental gradients is important to see whether abiotic differences alter patterns of species distribution and composition.2. We examined distributions of odonate SR, average taxonomic distinctness (ATD) and functional diversity (FD) (using the Shannon Index on proportions of plant-dependent and non-dependent species) with elevation and slope provided from an exploratory survey along a transect in the Sierra de Coalcomán Mountains, Michoacán State, Mexico. Adults were collected along both sides of a 500 m stream segment for 6 h day−1 site−1 in each of eight sites, and these species lists were complemented by collecting mature larvae.3. Species richness and FD declined with elevation among windward sites, while ATD increased. Among leeward sites, SR peaked at mid-elevation, and there was no trend for FD or ATD with elevation. Leeward sites were similar in species composition, whereas windward sites were dissimilar. Slope was correlated with elevation among windward sites, and influenced most variables, but not among leeward sites. FD was negatively correlated with ATD among sites along both aspects. Mean values of SR, ATD and FD between aspects were similar.4. The Energy-Richness Hypothesis best explained the species distributions along the windward aspect. Local abiotic influences appeared more important in community assembly among windward sites. Among leeward sites, the potential for Mid-Domain and Rapoport Effects suggest interspecies interactions control community assembly; providing greater potential for expansion of species elevational ranges, and an increase in range expansion of alien and non-endemic species along this aspect.
A detailed description and illustrations of the larva of Telebasis digiticollis Calvert, 1902 are... more A detailed description and illustrations of the larva of Telebasis digiticollis Calvert, 1902 are provided. A comparison with other larvae of the genus is made. Telebasis digiticollis is distinguished by I premental seta, 6-7 setae on the labial palp, a well-developed and convex ligula, 7-8 spiniform setae on the lateral margins of the prementum, and forceps-like mal e gonapophyses. The larva of T. digiticollis is more like that of T. boomsmae Garrison, 1994 than like other larvae of the genus. Larvae were found living in a lagoon densely covered by aquatic phanerogams such as Eichhornia sp. (Pontederiaceae) and Typha sp. (Typhaceae).
Journal of The New York Entomological Society, 2002
Detailed descriptíons and illustrations of the larvae of Erpetogomphus boa Selys and E. cophias S... more Detailed descriptíons and illustrations of the larvae of Erpetogomphus boa Selys and E. cophias Selys, are provided. Comparison with other larvae of the crotalinus-subgroup (sensu Garrison, 1994) ís also inc\uded. Both species are easily separable by general body coloratíon, length and shape of lígula, and delails of male's epiproct.
Odonate diversity in the Coalcomán Mountain Range (CMR), Michoacán State, Mexico, was surveyed, a... more Odonate diversity in the Coalcomán Mountain Range (CMR), Michoacán State, Mexico, was surveyed, and samplings were made during 2 years in eight streams along an altitudinal gradient. Presence–absence data were analyzed using non-parametric and parametric methods. Beta and gamma diversities were estimated using Whittaker’s and Lande’s formulae, respectively. A total of 2,526 adults and 489 larvae were captured, yielding 116 species (γ diversity), 44 genera and 9 families. Five new species were discovered. The genus Argia was the most important contributor to Zygoptera diversity and total richness (γ diversity), yielding 40.4 and 14.7%, respectively. The non-parametric estimator Chao2 provided the closest theoretical estimate of species richness, and Clench’s model fit the data well (R 2 ranged from 99.44 to 99.99) to explain a high proportion of the variance (98.8). We conclude that beta diversity is important at the landscape scale, supporting the hypothesis that Mexico is a beta diverse country. Our results triple the number of known species of Odonata for Michoacán. Given the considerable richness of odonates at local and landscape scales, our results support the proposal of the Coalcomán Mountain Range as a priority area for conservation and related research.
The larva of Argia percellulata is described and figured. It falls into the group of Argia larvae... more The larva of Argia percellulata is described and figured. It falls into the group of Argia larvae with a very prominent ligula and one palpal seta, but differs from its closest relatives by having tibiae usually with two well-defined dark rings, posterior margin of sternite 6 smooth, and posterior margin of sternite 7 smooth medially and with spiniform setae laterally. Larvae were found under cobblestones in open, wide, shallow streams where the water flow was slow to moderate, close to the shoreline within a cloud forest. The larva is compared with four other species apparently closely related.
Resumen. Se presenta un capítulo actualizado sobre Odonata de México. Desde la última actualizaci... more Resumen. Se presenta un capítulo actualizado sobre Odonata de México. Desde la última actualización en 2006, se describieron 5 especies nuevas, se adicionaron 11 registros nuevos y se describieron 14 especies en estado larval. Por tanto, la lista mexicana que aquí se presenta está constituida por un total de 355 especies. Se incluyen comentarios sobre endemismo, especies amenazadas y/o en riesgo.
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