IBBEA   24401
INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Unidad Ejecutora - UE
artículos
Título:
Description of the third instar of Hygrobia nigra (Clark, 1862) (Coleoptera: Paelobiidae), with a key for the identification of mature larvae of Hygrobia Latreille, 1804 and phylogenetic analysis
Autor/es:
MICHAT, M. C.; ALARIE, Y.; HENDRICH, L.
Revista:
ZOOTAXA
Editorial:
MAGNOLIA PRESS
Referencias:
Lugar: Auckland; Año: 2014 vol. 3827 p. 318 - 330
ISSN:
1175-5326
Resumen:
The mature larva of the squeak beetle Hygrobia nigra (Clark, 1862) (Paelobiidae) is studied for
the first time based on detailed descriptions and illustrations of selected
structures, with special emphasis on morphometry and chaetotaxy. A key for the
identification of mature larvae of four of the six species of Hygrobia Latreille, 1804 known worldwide is presented. The
phylogenetic relationships of the species are analyzed based on a cladistic
analysis of a combined data set including larval and adult characters. Hygrobia nigra shares with the other known species of the
genus several larval apomorphies including the presence of paramedian lip-like
lobes on the epipharynx, a well-developed gula, gills on thoracic and first
three abdominal sterna, and the maxillary stipites inserted into submental
pouches, and is unique in the presence of a larger number of secondary setae on
the metacoxa. The presence of a compact group of minute sensilla in the place
where the galea is commonly located suggests that members of Hygrobia lost the galea, a condition independently evolved
in some dytiscid lineages. The Australian species form a well-supported clade
characterized by the presence of a short nasale, fewer natatory setae on the
metatibia, and a marked shortening of the antennal sensorial appendage and the
last abdominal segment. However, no larval characters were discovered to
resolve relationships within that clade. The Palearctic H. hermanni
(Fabricius, 1775) lacks a distinct nasale and is resolved as sister to the
clade formed by the Australian species.