Feeding behaviour and diet of Bryconamericus microcephalus differed between canopy conditions. At the open canopy site, a behavioural modification, grazing on algae, was observed. This was also reflected in gut content analysis and suggests behavioural plasticity in response to resource availability.
This paper provided a list of all new Brazilian Hexapoda species described in 2020. Furthermore, based on the information extracted by this list, we tackled additional questions regarding the taxa, the specialists involved in the species descriptions as well as the journals in which those papers have been published. We recorded a total of 680 new Brazilian species of Hexapoda described in 2020, classified in 245 genera, 112 families and 18 orders. These 680 species were published in a total of 2019 articles comprising 423 different authors residing in 27 countries. Only 30% of these authors are women, which demonstrates an inequality regarding sexes. In relation to the number of authors by species, the majority of the new species had two authors and the maximum of authors by species was five. We also found inequalities in the production of described species regarding the regions of Brazil, with Southeast and South leading. The top 10 institutions regarding productions of new species have four in the Southeast, two at South and with one at North Region being the outlier of this pattern. Out of the total 219 published articles, Zootaxa dominated with 322 described species in 95 articles. The average impact factor was of 1.4 with only seven articles being published in Impact Factors above 3, indicating a hardship on publishing taxonomic articles in high-impact journals. The highlight of this paper is that it is unprecedent, as no annual record of Hexapoda species described was ever made in previous years to Brazil.
The species Forcipomyia (Trichohelea) opilionivora (Lane, 1947) (Diptera, Ceratopogonidae) was rediscovered in the state of Rio de Janeiro, Brazil, 75 years after its original description. This study aimed to investigate the ectoparasitic relationship between F. (T.) opilionivora and its host and document its occurrence, which was recorded serendipitously during the collection of Opiliones (harvestmen) specimens in Parque Nacional do Itatiaia in the state of Rio de Janeiro, Brazil. After the collection, both specimens were subjected to photographic documentation and preserved for further examination. This study presents the first photographic record of the ectoparasitic relationship between F. (T.) opilionivora and a harvestman, shedding light on a poorly studied interaction. The host specimen was identified as a female of Holcobunus nigripalpis Roewer, 1910 (Opiliones, Sclerosomatidae), a gagrelline commonlyfound in the Atlantic Forest of southeastern Brazil. Previous records of ectoparasitism between Ceratopogonidae and harvestmen were limited to the family level (Sclerosomatidae species, specifically Gagrellinae or Leiobuninae). However, no specific host species had been identified until now. The rediscovery of F. (T.) opilionivora, along with the identification of its host, addresses a significant gap in our knowledge regarding the biology and distribution of this species and provides valuable insights into the intricate relationships between biting midges and arachnids. This study emphasizes the need for further investigations into the biology of these ectoparasitic species and underscores the importance of documenting and studying lesser-known interactions within ecosystems.
Corethrellidae are poorly known in Colombia, with few specimens deposited in collections, and only nine named species of Corethrella Coquillett are reported for the country. An additional six undescribed species have been recently collected, indicating that the number of recorded species in Colombia is underestimated.
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