Morphology of the larvae and biology of the adults of Psilorrhynchus bifasciatus do not confirm previous hypotheses about systematics and feeding habits (Coleoptera: Cantharidae)

IF 0.9 4区 农林科学 Q3 ENTOMOLOGY
G. Biffi, L. Migliore, S. Casari
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引用次数: 1

Abstract

Psilorrhynchus bifasciatus (Blanchard, 1844) is broadly distributed through South America, but its biology, behaviour and life cycle are unknown. The most characteristic feature of the adults is slender rostrum, presumably associated to a specialised feeding habit. However, new observations of P. bifasciatus feeding on nectar in inflorescences of Matayba guianensis Aubl. (Sapindaceae) do not support such a hypothesis. Here, we describe and illustrate their early larval instars in details and compare them with the other Chauliognathini. The larvae are remarkably characterised especially by a long and thick pubescence, conspicuous roughness on the head and thoracic terga, and head with sharp lateral projections. These features are unique amongst the known Cantharidae larvae and do not confirm a previous hypothesis of close affinity between Psilorrhynchus Gemminger & Harold, 1869 and bromeliad-inhabiting Chauliognathini species.
双歧Psilorrhynchus bifasciatus幼虫的形态和成虫的生物学特征不能证实先前关于系统分类和摄食习性的假设(鞘翅目:斑蛾科)。
双瓣Psilorohrynchus bifasciatus(Blanchard,1844)广泛分布于南美洲,但其生物学、行为和生命周期尚不清楚。成虫最具特征的特征是细长的喙,可能与特殊的进食习惯有关。然而,双腹足线虫以圭亚那马泰巴花序中的花蜜为食的新观察结果。(Sapindaceae)并不支持这样的假说。在这里,我们详细描述和说明了它们的早期幼虫龄,并将它们与其他Chauliognathini进行了比较。幼虫的显著特征尤其是长而厚的被毛,头部和胸部有明显的粗糙,头部有尖锐的侧面突起。这些特征在已知的斑蝥科幼虫中是独特的,并且不能证实先前关于Psilorhrynchus Gemminger和Harold(1869)与居住在Chauliognathini物种中的凤梨属之间密切亲缘关系的假设。
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来源期刊
CiteScore
1.60
自引率
16.70%
发文量
15
审稿时长
6-12 weeks
期刊介绍: An open access journal publishing papers on insect systematics, morphology of adult and immature stages and/or their biology, phylogeny, large-scale catalogues, and general papers on methodology of insect systematics AEMNP is publishing papers on: Insect systematics, taxonomy and nomenclature; Morphology of adult and immature stages and/or their biology with possible applications in taxonomy and phylogeny; Phylogeny at least partly based on morphological characters (or with morphological characters mapped on the tree); Catalogues applicable for further taxonomy and biodiversity studies; General papers on methodology of insect taxonomy.
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