Zoological Studies

Vol. 60, 2021

(update: 2021.04.22)

Review of Chilean Cyrtinae (Diptera: Acroceridae) with the Description of Three New Species and the First Record of Villalus inanis from Argentina

Rodrigo M. Barahona-Segovia1,2,*, Vicente Valdés Guzmán3, and Laura Pañinao-Monsálvez2


1Departamento de Ciencias Biológicas y Biodiversidad, Universidad de Los Lagos, Av. Fuschlöcher 1305, Osorno, Chile. *Correspondence: E-mail: rbarahona13@gmail.com (Barahona-Segovia)
2Moscas Florícolas de Chile Citizen Science Program, pje. Arizona 4067a, Santiago. E-mail: laurapanina@gmail.com (Pañinao-Monsálvez)
3Biodiversidad Chilena Ltda, Camino Las Vertientes, Colonia Kennedy 190a, Paine. E-mail: vicente.mvg@gmail.com (Guzmán)

Received 29 June 2020 / Accepted 6 April 2021
Communicated by Y. Miles Zhang

Acrocerid flies are endoparasitoids of spiders and they distributed are in all ecosystems, except deserts and the poles. This group was historically classified into three subfamilies. However, molecular analyzes have indicated two new subfamilies. One of these is Cyrtinae Newman, which is made up of two clades: the north with Palearctic species, and the south, with Chilean species (Excepting the fossil genus Villalites Hennig). In the southern clade, endemic genera Holops Philippi and Villalus Cole have been poorly described over time by different authors. The aim of this study is to re-describe the known species of Holops and Villalus and to describe three new Holops species based on collected material: Holops grezi sp. nov., Holops anarayae sp. nov., and Holops pullomen sp. nov. In addition, an identification species key, updated distribution for all species and the first record of Villalus inanis from Argentina is also provided. New species are mainly characterized by the length of flagellum; colors of the postocellar lobe and thoracic segments, pilosity and legs; wing cells and veins, and shape of the abdomen. Morphological traits of Holops or Villalus do not share with any other extant genus known of Acroceridae in the southern hemisphere. Real biodiversity of this group must be evaluated with molecular phylogeny in the future. In addition, the new species belong to Pehuén and Valdivian forest provinces, areas considered as shelters of the last glacial period, promoting the speciation in several taxa. New and cryptic Holops species open the opportunity of disentangling the real biodiversity of spider flies in Chile.

Key words: Holops, Maule province, Spider flies, Valdivian forest province, Villalus inanis.

Citation: Barahona-Segovia RM, Guzmán VV, Pañinao-Monsálvez L. 2021. Review of Chilean Cyrtinae (Diptera: Acroceridae) with the description of three new species and the first record of Villalus inanis from Argentina. Zool Stud 60:0ii. doi:-.