Tag: ectoparasites

Guest blog post: New ectoparasite records from Honduras came from bats recorded since 2015

Guest blog post by Manfredo Alejandro Turcios-Casco

Since its foundation in 2015, the research team “The Big Bat Theory” has filled important information gaps regarding bats and their ectoparasites in Honduras. We started as just bachelor students mist-netting bats in our university (Universidad Nacional Autónoma de Honduras- UNAH) in our free time. Then we studied a lot about their natural history, distribution, and ecology, and, without any financial support, we started to travel the country studying bats.

The early years of “The Big Bat Theory” research group

At that time, we did not know that many of those records, in the future, would be important for Honduras. After saving some money, we travelled to different departments of Honduras such as Francisco Morazán, Valle, Gracias a Dios, Comayagua, and Santa Bárbara. Then we found support from Marcio Martínez to get to know La Mosquitia, and we started studying bats in unexplored regions. Because of this initiative, we collaborated with bat ectoparasite specialist Gustavo Graciolli and bat specialist Richard Laval, which resulted in the publication of our research in the open-access, peer-reviewed journal Check List.

As a result of this project, we were able to register for the first time the Spinturnicidae family in Honduras with the species Periglischrus iheringi and P. ojastii, a new record of Basilia ortizi (Nycteribiidae), Aspidoptera delatorrei, Strebla matsoni (found hosting Artibeus jamaicensis for the first time), and Neotrichobius bisetosus (Streblidae). The latter, previously only known from Venezuela, is the record with the northernmost locality published to date. We managed to increase the number of species of bat ectoparasites in Honduras to 48, which is 33 more than in Paraguay and 65 less than in Peru.

Species of ectoparasites recorded for the first time in Honduras: A) Periglischrus iheringi (Spinturnicidae); B) Periglischrus ojastii (Spinturnicidae); C) Aspidoptera delatorrei (Streblidae); D) Trichobius yunkeri (Streblidae); E) Basilia ortizi (Nycteribiidae); F) Neotrichobius bisetosus (Streblidae); G) Strebla matsoni (Streblide).

We definitely consider that this still misunderstood group needs more research effort locally and in general. Considering the lack of knowledge, the chances of discovering new species for the region, new records for the country or region, as well as new discoveries about the relationship and interactions with their hosts, are high. The number of bat species registered for Honduras is a predictor of the number of ectoparasite species that may exist. We also consider “La Reserva de la Biosfera del Río Plátano” an important site for the study of ectoparasites of bats. This is the most important area in Honduras for bat research and conservation, not only because of its high biodiversity, but also because it is a poorly studied region.

“We are very motivated to have carried out this study on new records of ectoparasites in bats, since it is the first investigation we do on this taxon, but we are sure that it will not be the last, since we have already begun to collect new data in collaboration with experts on this topic. We are sure that new discoveries still await us in this area, and we are eager to make new contributions and enrich the information on this taxon in Honduras and the world.”

Alejandro Orellana, co-author of the publication

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Research paper:

Gustavo Graciolli G, Ávila-Palma HD, Ordoñez-Trejo EJ, Soler-Orellana JA, Ordoñez-Mazier DI, Martínez M, LaVal R, Turcios-Casco MA (2021) Additions of host associations and new records of bat ectoparasites of the families Spinturnicidae, Nycteribiidae and Streblidae from Honduras. Check List 17(2): 459–469. https://doi.org/10.15560/17.2.459

New species of fungus sticking out of beetles named after the COVID-19 quarantine

A major comprehensive study on Herpomycetales and Laboulbeniales, two orders of unique ectoparasitic fungi associated with insects and other arthropods (class Laboulbeniomycetes) in Belgium and the Netherlands was published in the open-access, peer-reviewed scholarly journal MycoKeys.

A major comprehensive study on Herpomycetales and Laboulbeniales, two orders of unique ectoparasitic fungi associated with insects and other arthropods (class Laboulbeniomycetes) in Belgium and the Netherlands was published in the open-access, peer-reviewed scholarly journal MycoKeys.

Having surveyed arthropod fauna using pitfall traps and an illuminated white screen at night, and with the help of a network of entomologists, Dr. Danny Haelewaters (Purdue University, University of South Bohemia and Ghent University) and Dr. André De Kesel (Botanic Garden Meise) provide identification details about a total of 140 fungal species. The list includes nine species that are reported for the first time for either of the two countries and two newly described species.

Interestingly, one of the novel fungi was described during the 2020 global quarantine period, imposed to curb the COVID-19 pandemic. This prompted the researchers to dedicate the newly discovered species to this extraordinary time. In the annals of science, the species will be going by the name of Laboulbenia quarantenae.

Laboulbenia quarantenae grows externally on the body of ground beetles belonging to the species Bembidion biguttatum and is thus far only found at the Botanic Garden Meise in Belgium. This new fungus is considered to be very rare compared to Laboulbenia vulgaris, another, well-documented species that is more commonly found on the same host. So far, there has been no evidence that L. quarantenae parasitizes other host species.

Extreme close-up of the thalli of a fungus in the genus Hesperomyces (H. virescens sensu lato) parasitizing a harlequin ladybird (Harmonia axyridis).
Image by Gilles San. Drawing by André De Kesel.

Herpomycetales and Laboulbeniales–unlike common mushrooms–do not form branching thread-like hyphae, nor a mycelium. Rather, they grow a single three-dimensional thallus of a few thousand cells sticking out of the body of the host organism. While some species of Laboulbeniales, like Laboulbenia quarantenae, are superficially attached to their host, others are more invasive, such as Hesperomyces halyziae, the second fungus newly described in this study. These fungi produce a haustorium, which is a hyphal outgrowth used to penetrate the tissues of their arthropod hosts, so that they can reach to the primary body cavity and the circulatory fluid in there. By doing so, it is thought that the parasites can both increase surface area for nutrient uptake and tighten their grip on their host.

In their study, the scientists hypothesize that, because of their invasive nature, these haustorial parasites maintain close interactions with their hosts in a process referred to as an “evolutionary arms race”. This means that whenever the host evolves a defence mechanism against the fungus, the parasite promptly evolves in its own turn, and adapts accordingly. Eventually, specialization leads to the evolution of new species.

The present study compiles all available data from Belgium and the Netherlands and serves as an appropriate starting point for an updated checklist of thallus-forming fungi in the class Laboulbeniomycetes found across Europe. Such a checklist is an ongoing project meant to summarize decades of research and will undoubtedly continue to uncover significant fungal diversity. The last update of this piece of knowledge dates back to 1991.

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Original source:

Haelewaters D, De Kesel A (2020) Checklist of thallus-forming Laboulbeniomycetes from Belgium and the Netherlands, including Hesperomyces halyziae and Laboulbenia quarantenae spp. nov. MycoKeys 71: 23-86. https://doi.org/10.3897/mycokeys.71.53421

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Follow lead author Dr. Danny Haelewaters on Twitter (@dhaelewa) and visit his website at: https://www.dannyhaelewaters.com/.