A new species of bamboo-feeding plant lice found in Costa Rica

Feb 06, 2012
This is Chusquea tomentosa, the bamboo which constitutes the diet of the newly found plant lice (based on current data). Credit: Nicolás Pérez Hidalgo et al.

Several periods of field work during 2008 have led to the discovery of a new species of bamboo-feeding plant lice in Costa Rica's high-altitude region "Cerro de la Muerte". The discovery was made thanks to molecular data analysis of mitochondrial DNA. The collected records have also increased the overall knowledge of plant lice (one of the most dangerous agricultural pests worldwide) from the region with more that 20%. The study was published in the open access journal ZooKeys.

It is a well established fact that the arthropod fauna, to which plant lice also belong, is abundantly present in the tropical regions. Not so with plant lice, which prefer the temperate climates of the . This has been a bit of a paradox for scientists although it is also known that plant lice diversity increases in areas, such as mountains and high plateaus. Such is the sampling area visited in Costa Rica: "Cerro de la Muerte", or The Mountain of the Dead, the highest point in the Costa Rican section of the Inter-American Highway.

This is a microscope-enhanced photo of the newly found aphid (plant lice), Rhopalosipum chusqueae. Credit: Nicolás Pérez Hidalgo et al.

Many plant lice species feed only on one type (or even species) of plant; the diet of the newly described plant lice species consists (based on current data), for example, solely of a type of bamboo (Chusquea tomentosa). A molecular analysis was used to determine to which taxonomic genus it belongs (Rhopalosiphum). Its description is based also on molecular information of fragments of the (COI), and on nuclear gene coding, in addition to morphologic external characteristics.

Plant lice are recognized among the biggest on agriculture and gardening. From a zoological point of view though, they are very successful organisms, which although present mainly in temperate climates, have the potential to threaten even tropical regions, dedicated to plant cultivation.

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More information: Pérez Hidalgo N, Martínez-Torres D, Collantes-Alegre JM, Villalobos Muller W, Nieto Nafría JM (2012) A new species of Rhopalosiphum (Hemiptera, Aphididae) on Chusquea tomentosa (Poaceae, Bambusoideae) from Costa Rica. ZooKeys 166: 59-73. doi: 10.3897/zookeys.166.2387

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