Riqueza de formigas de solo na praia da Pedreira, Parque Estadual de Itapuã, Viamão, RS, Brasil

Abstract

ABSTRACT. Richness of ground-dwelling ants in the Praia da Pedreira, Parque Estadual de Itapuã, Viamão, RS, Brazil. Aiming to improve the knowledge on the Brazilian biodiversity, especially the ant fauna of Rio Grande do Sul State (Southern Brazil), this survey was conducted in the Praia da Pedreira, a site of Intensive Use of the Parque Estadual de Itapuã. Ground-dwelling ant species were surveyed for three environments in the beach (native forest, rock bar and sand bar), during 12 months (April/2000 -March/2001. Collections resulted in 60 species belonging to 24 genera, 18 tribes and eight subfamilies (Dolichoderinae, Ecitoninae, Ectatomminae, Formicinae, Heteroponerinae, Myrmicinae, Ponerinae and Pseudomyrmecinae). According to the first order jackknife estimator, the native forest area presented the greatest richness (S est = 37.5), followed by rock bar (S est = 8.9) and sand bar (S est = 5.9). Only Acromyrmex laticeps, Crematogaster sp. and Solenopsis invicta were common to all three environments. This paper presents the first record of Pachycondyla crenata and Pachycondyla laevigata (Ponerinae) occurrence in the Rio Grande do Sul State.KEYWORDS. Biodiversity, epygeous ant fauna, Formicidae, Insecta. RESUMO. Riqueza de formigas de solo na praia da Pedreira, Parque Estadual de Itapuã, Viamão, RS, Brasil. Neste trabalho são listadas as espécies de formigas de solo encontradas em três ambientes (mata nativa, barreira pedregosa e areias da orla) na praia da Pedreira, localizada na Zona de Uso Intensivo do Parque Estadual de Itapuã, município de Viamão, RS. No total, foram identificadas 60 espécies representantes de 24 gêneros, 18 tribos e oito subfamílias (Dolichoderinae, Ecitoninae, Ectatomminae, Formicinae, Heteroponerinae, Myrmicinae, Ponerinae e Pseudomyrmecinae). Dos três ambientes amostrados, de acordo com o estimador de riqueza jackknife de primeira ordem, a mata nativa apresentou a maior riqueza (S est = 37,5), seguindo-se a barreira pedregosa (S est = 8,9) e as areias da orla (S est = 5,9). Apenas Acromyrmex laticeps, Crematogaster sp. e Solenopsis invicta foram comuns aos três ambientes. Neste trabalho é feito o primeiro registro de ocorrência de Pachycondyla crenata e Pachycondyla laevigata (Ponerinae) para o Rio Grande do Sul.PALAVRAS-CHAVE. Biodiversidade, Formicidae, Insecta, mirmecofauna epigéica.

Richness of Termites and Ants in the State of Rio Grande do Sul, Southern Brazil

“…in soils with different copper levels, including a copper mine and a native savanna area in the Camaquã River Basin in the Sul-Riograndense Shield ; 5) restingas in Morro da Grota (30° 21' S, 50° 01' W; 263 m a.s.l.) near Lagoa dos Patos and a typical forest of granite soil, sandy and rocky areas in Pedreira beach (30° 21' S, 50° 02' W; at the sea level), on the banks of the Guaíba Lake, both at the Itapuã State Park in Viamão, which is within both Sul-Riograndense Shield and Coastal Plain (Sacchett & Diehl, 2004;Diehl et al, 2005a;Diehl, unpub. ms.); 6) Eucalyptus plantation in restingas in Capivari do Sul (30° 11' S, 50° 21' W; 12 m a.s.l.) and Tramandaí (29° 59' S, 50° 13' W; 8 m a.s.l.)…”

Additions to the taxonomy of Pheidole (Hymenoptera: Formicidae) from the southern grasslands of Brazil

“…The taxonomic synopsis of the Pheidole species in Brazilian southern grasslands includes new species and species with revived status, and also the previously published records for this region (Diehl et al, 2005;Pinheiro et al, 2010;Rosado et al, 2012;Dröse et al, 2017;Franco & Feitosa, 2018;Dröse et al, 2019, Martins et al, 2020see Figs. 13-18).…”

“…Martins et al, 2020), and Rio Grande do Sul (e.g. Diehl et al, 2005;Albuquerque & Diehl, 2009;Pinheiro et al, 2010;Rosado et al, 2012;Diehl et al, 2014;Dröse et al, 2017), all of them revealing a considerable number of unidentified Pheidole species. Several limitations have led to this taxonomic impediment, including: (1) the absence of a comprehensive and user-friendly key to the identification of the Brazilian Pheidole species, (2) the difficulty in understanding the species limits within the genus, (3) and the high number of undescribed species from the southern part of the Neotropics.…”