Description of Amblyomma monteiroae n. sp. (Acari: Ixodidae), a parasite of the great horned owl (Strigiformes: Strigidae) in southern Brazil.
Amblyomma parvitarsum
Bubo virginianus
Hard ticks
Rio Grande do Sul
Taxonomy
Journal
Ticks and tick-borne diseases
ISSN: 1877-9603
Titre abrégé: Ticks Tick Borne Dis
Pays: Netherlands
ID NLM: 101522599
Informations de publication
Date de publication:
11 2023
11 2023
Historique:
received:
03
04
2023
revised:
03
07
2023
accepted:
15
07
2023
medline:
27
9
2023
pubmed:
29
8
2023
entrez:
28
8
2023
Statut:
ppublish
Résumé
In 2020, adult hard ticks (males and females) were collected from great horned owls [Bubo virginianus (Gmelin, 1788)] in the coastal region in southern Brazil. The engorged females were allowed to oviposit in the laboratory and hatched larvae could be obtained. Analyses of the external morphology of the adult ticks revealed that they represent a new species, which was named Amblyomma monteiroae n. sp. Partial sequences of the mitochondrial 16S rRNA gene and the nuclear second internal transcribed spacer (ITS2) were generated from a male and a female. Their 16S rRNA haplotypes were identical to each other and closest (96% identity) to corresponding sequences of Amblyomma parvitarsum Neumann, 1901, and 90% identical to Amblyomma neumanni Ribaga, 1902. Their ITS2 haplotypes were 95.8 to 96.0 identical to the single ITS-2 partial sequence of A. parvitarsum available in GenBank. In the phylogenetic trees inferred by both 16S rRNA and ITS2 partial sequences, A. monteiroae n. sp. formed a clade with A. parvitarsum, with A. neumanni branching sister to this clade. Amblyomma monteiroae n. sp. is genetically and morphologically related to A. parvitarsum. Both tick species are unique in combining the following morphological characters: scutum extensively ornate; eyes rounded and bulging; coxa I with two moderate pointed spurs, the external longer than the internal; a single triangular short spur on coxae II-III; presence of two spines on the tibia of legs II-IV; hypostomal dentition 3/3, trochanters without spurs. However, the males of the two species can be separated by specific features in palps and festoons, whereas the females differ in specific features of the coxal spurs. The larva of A. monteiroae n. sp. can be morphologically distinguished from A. parvitarsum only by morphometry, with the former species being slightly smaller. Currently, A. monteiroae n. sp. is restricted to southern Brazil, and the only known host is B. virginianus (Strigiformes: Strigidae). The present study increases the Amblyomma Brazilian fauna to 34 species.
Identifiants
pubmed: 37639830
pii: S1877-959X(23)00120-6
doi: 10.1016/j.ttbdis.2023.102239
pii:
doi:
Substances chimiques
RNA, Ribosomal, 16S
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
102239Informations de copyright
Copyright © 2023. Published by Elsevier GmbH.
Déclaration de conflit d'intérêts
Declaration of Competing Interest None.