Aspectos biológicos de Pelidnota fulva Blanchard, 1850 (Coleoptera, Scarabaeidae, Rutelinae)

Abstract

Some species of Scarabaeidae present an important function in the decomposition and recycle of organic material and because there is little information on this group of insects, the objective of the present study was to evaluate the biological aspects of Pelidnota fulva Blanchard, 1850. Determination of the period of occurrence was performed by capture of adults with a light trap and in laminated areas of the experimental farm belonging to the Universidade Estadual de Mato Grosso do Sul, Brazil, from January 2008 to December 2009. After mating and obtaining of the eggs biological studies were initiated, in which the insects were maintained in an acclimatized chamber at 26 + 1 ºC with photophate for 12 hours. Adult occurrence was short in the field, being captured in October and November of 2008 and September and October of 2009. Eggs were obtained in the laboratory which possessed average dimensions of 2.5 × 1.9 mm, and after a few days the same dimensions averages 3.4 × 3.3 mm. The embryonic period lasted 15.1 days; the first, second and third instar larvae periods lasted 22.4, 36.9 and 209.7 days, respectively; and the pupa phase lasted 20.7 days. Average duration of the egg to adult cycle was 309.3 days, characterizing the species as univoltine. Adults possess longevity of 12.8 days. Mating was observed in the laboratory which presented minimal and maximal durations of 8 minutes and 1 hour and 13 minutes.

Biological aspects of Leucothyreus ambrosius Blanchard (Coleoptera, Melolonthidae, Rutelinae)

“…This behavior has been observed in several species of Melolonthidae, such as L. femoratus , Anomala testaceipennis Blanchard, 1850 and L. fuscus (Rodrigues et al 2008ab), C. verticalis (Rodrigues et al 2010b), and P. fulva (Rodrigues & Falco 2011). Pupae of L. ambrosius are larger than those of L. femoratus, which are light yellow and measure about 14-16 mm in length and 7-12 mm wide (Pardo-Locarno et al 2006).…”

Scarabaeoidea (Insecta: Coleoptera) no Cerrado brasileiro: estado atual do conhecimento

“…Na maioria das espécies as larvas podem ser encontradas no solo entre os meses de novembro e março (RODRIGUES et al, 2008a;RODRIGUES et al, 2008b;PUKER et al, 2009;SANTOS & ÁVILA, 2009a;COUTINHO et al, 2011), com algumas exceções como L. fuscus e C. forsteri onde a fase larval ocorre em maior densidade entre abril e setembro (COUTINHO et al, 2011). O período larval pode durar até 269 dias como em P. fulva (RODRIGUES & FALCO, 2011). As pupas possuem coloração variando de branco-amarelado a marromcaramelo e, em algumas espécies, pode-se notar o dimorfi smo sexual já neste estágio (RODRIGUES et al, 2010b).…”

“…Assim como os besouros coprófagos, espécies como P. fulva (RODRIGUES & FALCO, 2011) Em geral, mudanças na paisagem, desmatamento ou mesmo refl orestamentos alteram a estrutura da comunidade de escarabeídeos e a composição de espécies locais (GRIES et al, 2012), com raras exceções (RESENDE, 2012). Como são sensíveis às perturbações, estudos sugerem a utilização desses insetos como bioindicadores (ALMEIDA & LOUZADA, 2009;BORGES et al, 2011;GRIES et al, 2012).…”

“…A armadilha luminosa tem sido amplamente utilizada para amostrar Scarabaeoidea noturnos fototrópicos positivos, mostrando efi ciência na captura deste grupo (FLECHTMANN et al, 1995a;FLECHTMANN et al, 1995b;FLECHTMANN et al, 1995c;NUNES & FRIZZAS, 2007;BRANCO et al, 2010;ABOT et al, 2012), principalmente para estudos de dinâmica populacional (RODRIGUES et al, 2008a;RODRIGUES et al, 2008b;COSTA et al, 2009;SANTOS & ÁVILA, 2009a;RODRIGUES et al, 2010a;RODRIGUES et al, 2010b;RODRIGUES & FALCO, 2011). A armadilha de queda (pitfall) pode ser utilizada sem isca (SILVA et al, 2010) ou pode conter iscas que atraem uma gama mais específi ca de besouros denominados copronecrófagos.…”

Pelidnota granulata (Gory, 1834) (Coleoptera, Scarabaeidae, Rutelinae): description of the pupa and new records from Amazonas state, Brazil

“…Descriptions of preimaginal stages are scarcely provided to species of Pelidnota (cf., Albertoni et al, 2014). Biological data were added to some Pelidnota species with economic importance (Hoffmann, 1936;Lordello, 1951;Morón & Deloya, 2002;Rodrigues & Falco, 2011). However, larvae of only four species are known: Pelidnota fulva Blanchard, 1850 described by Rodrigues & Morón (2012), Pelidnota lugubris LeConte, 1874 described by Lugo-García et al (2019), Pelidnota punctata (Linnaeus, 1758) figured by Isaac (1907: fig.…”