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Issue: Vol. 5315 No. 2: 7 Jul. 2023
Type: Article
Published: 2023-07-07
DOI: 10.11646/zootaxa.5315.2.1
Page range: 101-121
Abstract views: 585
PDF downloaded: 201

A new species of the fish louse genus Dipteropeltis Calman, 1912 (Crustacea: Branchiura) from Peru

Department of Integrative Biology; University of South Florida; 4202 E. Fowler Ave.; Tampa; FL USA 33620
UF/IFAS Florida Medical Entomology Lab; University of Florida; 200 9th St SE; Vero Beach; FL USA 32962
Instituto de Investigaciones de la Amazonía Peruana; Av. Jose Abelardo Quiñones Km. 2.5; 00784; Iquitos; Peru 00784
UF/IFAS Citrus Research and Education Center; University of Florida; 700 Experiment Station Rd. Lake Alfred; FL USA 33850; Department of Animal Sciences, University of Florida; 2250 Shealy Dr. Gainesville, FL USA 32608.
Department of Integrative Biology, University of South Florida; 4202 E. Fowler Ave., Tampa, FL USA 33620.
Crustacea Argulidae Brycon amazonicus DNA barcoding ontogeny parasite scanning electron microscopy South America Triportheus albus

Abstract

Dipteropeltis is a poorly described genus of fish louse endemic to South America. In a small blackwater region within Loreto, Peru, 13 adult and juvenile specimens of an unidentified species of Dipteropeltis Calman, 1912, as well as one adult specimen of D. hirundo Calman, 1912, were observed and collected. Scanning electron and light micrographs were acquired to examine and measure key features of these specimens. Morphological differences from the two known species of Dipteropeltis, D. hirundo and D. campanaformis Neethling et al., 2014, indicate that the collected specimens represent a new species. Dipteropeltis longicaudatus sp. nov. is diagnosed by elongate abdominal lobes, a chevron-shaped carapace, and uniquely shaped maxillae. One specimen represents the longest branchiuran documented to date at 31.5 mm. Additionally, we provide the first sequence data for this genus using DNA barcoding, which corroborates our designation of a new species. Videos were also captured that document behaviors including host attachment, pulsating abdominal lobes, suction disc “walking”, and swimming. Findings have implications for its teleost hosts, Triportheus albus Cope, 1872 and Brycon amazonicus Spix & Agassiz, 1829, the latter being a critical species for aquaculture and commercial fisheries in Amazonia.

 

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