Friday, May 8, 2020

A new plant hopper: Haplaxius dougwalshi

Planthoppers are insects of the infraorder Fulgoromorpha, which consists of some 12,500 described species worldwide. The name comes from their resemblance to leaves and other plant parts and from the fact that they often jump in a similar way to that of grasshoppers.

Planthoppers are feeding on plant sap and are therefore often vectors for plant diseases which are transmitted in the process.

The new species was named in reference to Dr. Doug Walsh at Washington State University, who’s signature moustache resembles the colour pattern observed on the frons of the new species.

For the experts: The genus Haplaxius is a large taxon of cixiid planthoppers that is of economic importance due to the ability of Haplaxius crudus to transmit lethal yellowing in coconut palms. Haplaxius dougwalshi sp. n. is established as a new taxon of Cixiidae in the tribe Oecleini collected from native palms in lowland tropical rainforest in Costa Rica. Placement in the genus Haplaxius is supported both by molecular evidence based on the COI and 18S genes as well as by morphological characters. This novel taxon was discovered during survey work in Costa Rica to look for phytoplasmas and document planthopper diversity on palms. Furthermore, Haplaxius skarphion was also collected from coconut palms during survey work and is reported for the first time in Costa Rica.

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