INVESTIGADORES
ARCHANGELSKY Miguel
artículos
Título:
Description of the preimaginal stages of Lancetes marginatus (Steinheil) and L. biremis Říha (Coleoptera: Dytiscidae), and comparative notes with other Lancetes larvae.
Autor/es:
MICHAT, M. C., M. ARCHANGELSKY & P. L. M. TORRES
Revista:
STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT
Editorial:
Swets & Zeitlinger
Referencias:
Lugar: Lisse (Holanda); Año: 2005 vol. 40 p. 129 - 142
ISSN:
0165-0521
Resumen:
All the
preimaginal stages of Lancetes marginatus
(Steinheil) and third instar larva of L.
biremis Říha are described and figured for the first time. Detailed
analyses of the morphometry, chaetotaxy and porotaxy are provided, and
comparisons with the immatures of other species of the genus are included. The
larvae described have multifragmented urogomphi, the only larval synapomorphy
that defines the genus Lancetes
Sharp. Third instars also present a secondary subdivision in some of the cephalic
appendages, which is a synapomorphy of Lancetes
plus Dytiscinae. First instar larva of L.
marginatus is distinguished from the remaining known first instars of Lancetes by the absence of primary pores
FRe and MXa, and the presence of one additional minute seta on the dorsal
surface of antennomere 4 and one additional pore on the urogomphus. The third
instar of L. marginatus is unique by
the absence of secondary dorsal setae on the femur. The pupa of L. marginatus differs from that of L. angusticollis by the presence of
fewer setae on the head, pronotum and abdominal terga V to VIII.