Showing papers by "José Luis Navarrete-Heredia published in 2021"
TL;DR: In this article, the authors synthesize what is currently known about beetles as floral visitors in the family Magnoliaceae, one of the earliest extant groups of flowering plants, and assess the possible role of anthophagous scarabs (subfamilies Cetoniin, Melolonthinae, Dynastinae and Rutelinae) in the diversification of magnoliaceae.
Abstract: Due to its ancient origin in the Permian and the high proportion of beetle-pollinated taxa within ancestral magnoliid lineages, it has been hypothesized that beetles were among the first floral visitors of the proto-angiosperms on Earth. Thus, beetle-pollinated flowers have become important model systems essential for the study of the origin and evolution of angiosperms. Under an evolutionary perspective, in this review we synthesize what is currently known about beetles as floral visitors in the family Magnoliaceae, one of the earliest extant groups of flowering plants. Nitidulidae and Scarabaeidae are the two most common groups of beetles reported in the literature as floral visitors to Magnoliaceae; however, the evidence indicates that most modern families of beetles including all the families with known taxa associated with Magnoliaceae had already originated when the latter first appeared by the end of the early Cretaceous. Hence, Magnoliaceae could have represented a newly opened ecological niche that beetles gradually colonized and exploited, possibly shifting from gymnosperm hosts. By feeding, mating and sheltering in their flower structures, beetles have played a major role in shaping the floral biology and morphology of Magnoliaceae. Protogyny, thermogenesis, floral odors and floral movements are traits that could have evolved in response to selection pressures imposed by beetles. Further studies should assess the possible role of anthophagous scarabs (subfamilies Cetoniinae, Melolonthinae, Dynastinae and Rutelinae) in the diversification of Magnoliaceae, since this event broadly coincides with the origin of those groups of beetles in the Eocene, some of which exhibit very close associations with several Magnoliaceae species.
4 citations
TL;DR: In this paper, the authors used measures of diversity and biogeographic patterns to evaluate the response of dung-beetle assemblages at two cattle ranches with different management systems on the southern Mexican High Plateau.
Abstract: In this work, we used measures of diversity and biogeographic patterns to evaluate the response of dung-beetle assemblages (Coleoptera: Scarabaeidae: Scarabaeinae) at two cattle ranches with different management systems on the southern Mexican High Plateau. The number of individuals and biomass were used as the primary diversity attributes of the assemblage. The 1D and 2D true diversity indexes of these attributes were examined, and the attributes were classified according to Halffter’s biogeographical patterns. In total, 1375 Scarabaeinae adults were collected, representing 11 species and seven genera. Site management regime did not significantly affect species richness or assemblage structure when the number of individuals was considered. However, species diversity and biomass turnover were higher in the system with holistic management than in that with semitechnified management. The proportions of Halffter’s biogeographical patterns also differed between the two production systems. In conclusion, the location under holistic management, despite having cattle production, contained a significant proportion of the Scarabaeinae species that are typical of the Mexican High Plateau. In contrast, the semitechnified system negatively impacted beetle abundance, leading to half the individuals, the dominance of species with high biomass, and the absence of groups typical of the region.
2 citations
01 Jul 2021
TL;DR: The list of species and two subspecies of Endomychidae, nine of Anamorphidae and two of Eupsilobiidae are reported, and first records for Mexican states and countries of the Neotropical region are provided.
Abstract: The list of species of fungus beetles families Endomychidae, Anamorphidae and Eupsilobiidae (Endomychidae sensu lato) in Mexico is updated. Fifty three species and two subspecies of Endomychidae, nine of Anamorphidae and two of Eupsilobiidae are reported. Bystus is the most diverse genus in Anamorphidae (4 spp.); Stenotarsus (23 spp.) is the most diverse genus in Endomychidae followed by Epipocus (21 spp.). Veracruz is the Mexican state with the highest diversity for the three families (31 Endomychidae spp., 5 Anamorphidae spp. and 1 Eupsilobiidae spp.), followed by Chiapas (17 Endomychidae spp.), Oaxaca (15 Endomychidae spp.) and Jalisco (13 Endomychidae spp.). Additionallly, first records for Mexican states and countries of the Neotropical region are provided. Stenotarsus lemniscatus Gorham is recorded from Belize, S. mexicanus Arriaga-Varela et al. from Belize, Epipocus alvaradi Strohecker from El Salvador, E. manni Strocheker from Honduras, E. punctatus LeConte from Nicaragua, Anidrytus compactus Strohecker from Ecuador and A. helvolus Gerstaecker from Argentina.
1 citations
1 citations
28 Oct 2021
TL;DR: In this article, the composition and seasonality of the necrocolous Staphylinidae assemblage and the necrophilous ensemble collected with carrion traps in the Parque Estatal Bosque de Arce (PEBA) were analyzed.
Abstract: The purpose of this study was to analyze the composition and seasonality of the necrocolous Staphylinidae assemblage and necrophilous Staphylinidae ensemble collected with carrion traps in the Parque Estatal Bosque de Arce (PEBA), Talpa de Allende, Jalisco, Mexico. Five carrion traps baited with squid were placed during the months of July 2015 to June 2016. The necrocolous assemblage was composed of 3444 specimens belonging to 11 subfamilies, 12 tribes, nine subtribes, 25 genera, and 54 morphospecies. The necrophilous ensemble included 3389 specimens in six subfamilies, six tribes, four subtribes, 11 genera, and 18 morphospecies. Of these, 61.1% are predators and 38.9% are saprophages. Specimens belonging to the subfamily Aleocharinae were not incorporated in our analyses of the necrocolous assemblage nor the necrophilous ensemble. Small-sized species (1.5–4 mm) and medium-sized species (5–9 mm) have a greater abundance than large-size species (10–15.65 mm). Seasonality was a significant factor in the composition of the necrocolous assemblage and the necrophilous ensemble in PEBA. Lordithon obliquus (Sharp) and Xanthopygus rufipennis Sharp are recorded for the first time in the state of Jalisco.
1 citations
TL;DR: The Onthophagus chevrolati Harold, 1869 was recently studied and a majority of its species were newly described or redescribed (see Moctezuma & Halffter 2020) as discussed by the authors.
Abstract: The Onthophagus chevrolati Harold, 1869 (Coleoptera: Scarabaeidae: Scarabaeinae: Onthophagini) species complex was recently studied, and a majority of its species were newly described or redescribed (see Moctezuma & Halffter 2020). Onthophagus viridichevrolati Moctezuma & Halffter, 2020 was the only species within the O. chevrolati species complex recognized to occur in the Mexican state of Jalisco (Moctezuma & Halffter 2020). Recently, new material belonging to the O. chevrolati species complex was collected from the maple (Acer; Sapindaceae) forests of Talpa de Allende, Jalisco, Mexico. The examination of these specimens showed that they are morphologically similar to O. chevrolati Harold, 1869 and belong to an undescribed species. In this study, we provide photographs of the habitus (male and female) and male genitalia of O. acernorus new species; an identification key to separate it from O. chevrolati, and an updated distribution map of the O. chevrolati species complex.