A possible hatchling of a jumping bristletail in 50 million years old amber

Haug, Joachim T.; Hädicke, Christian W.; Haug, Carolin; Hörnig, Marie K.

doi:10.1127/njgpa/2015/0523

Cited by 7 publications

(8 citation statements)

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“…Within Insecta, all non-pterygotan lineages can be excluded from further phylogenetic consideration, as the specimen has no indication of prominent processes on the posterior abdomen segments (cerci and/or terminal filament present in: Diplura: Sendra et al, 2006Sendra et al, , 2016Reboleira et al, 2010;Zygentoma: Espinasa et al, 2012;Smith, 2013;Archaeognatha: Sturm, 2009;Hädicke et al, 2014;Haug et al, 2015a;Zhang et al, 2018; furca as present in Collembola: Fjellberg, 1986;Hopkin, 1997;Hädicke, Haug & Haug, 2013) and mostly possesses a well developed antenna (absent in Protura; Böhm et al, 2011;Bai & Bu, 2013;Galli et al, 2016).…”

Section: Systematic Interpretation: General Aspectsmentioning

confidence: 99%

An unusual 100-million-year old holometabolan larva with a piercing mouth cone

Haug

Schädel

Baranov

et al. 2020

PeerJ

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Holometabola is a hyperdiverse group characterised by a strong morphological differentiation between early post-embryonic stages (= larvae) and adults. Adult forms of Holometabola, such as wasps, bees, beetles, butterflies, mosquitoes or flies, are strongly differentiated concerning their mouth parts. The larvae most often seem to retain rather plesiomorphic-appearing cutting-grinding mouth parts. Here we report a new unusual larva preserved in Burmese amber. Its mouth parts appear beak-like, forming a distinct piercing mouth cone. Such a morphology is extremely rare among larval forms, restricted to those of some beetles and lacewings. The mouth parts of the new fossil are forward oriented (prognathous). Additionally, the larva has distinct subdivisions of tergites and sternites into several sclerites. Also, the abdomen segments bear prominent protrusions. We discuss this unusual combination of characters in comparison to the many different types of holometabolan larvae. The here reported larva is a new addition to the ‘unusual zoo’ of the Cretaceous fauna including numerous, very unusual appearing forms that have gone extinct at the Cretaceous–Palaeogene boundary.

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Section: Systematic Interpretation: General Aspectsmentioning

confidence: 99%

An unusual 100-million-year old holometabolan larva with a piercing mouth cone

Haug

Schädel

Baranov

et al. 2020

PeerJ

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“…An especially interesting type of preservation for hatchlings is fossilised resin, or amber. Here numerous examples have been recognised as hatching stages for example of myriapods (HAuG et al 2018) but especially various insect groups including jumping bristletails (HAuG et al 2015) and cockroaches (GröHn 2015; HörniG et al 2016).…”

Section: General Background: the Fossil Record Of Hatchlings And Earlmentioning

confidence: 99%

Caught in the act of hatching – a group of heteropteran nymphs escaping from their eggs preserved in Dominican amber

Hörnig¹,

Fischer²,

Haug³

2019

Palaeodiversity

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“…Traditionally, insect post‐embryonic development has been distinguished into three different types, namely ametaboly, hemimetaboly and holometaboly. Different authors have already recognised that ametaboly is not fundamentally different from hemimetaboly, despite the fact that the adult has no wings (see discussions in Haug, Hädicke, Haug, & Hörnig, ; Haug, Haug, & Garwood, and references therein). In this frame of thought, also wingless forms of polyneopteran insects such as notopterans would have to be interpreted as ametabolous.…”

Section: Application Of the Terms To Different Metazoan Groupsmentioning

confidence: 99%

Why the term “larva” is ambiguous, or what makes a larva?

Haug

2018

Acta Zoologica

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The term “larva” is used for many different metazoans. Although this implies a uniform meaning, the term has in fact been used to address immatures with very different characteristics. For providing more precise reference how the term larva is applied in a specific context, I outline here different criteria that have been used to identify an immature as a larva. These include larvae that (a) differ morphologically from their adult (morpho‐larva s. l.); (b) differ morphologically from their adult and additionally possess structures that become reduced during ontogeny (morpho‐larva s. str.); (c) have a different ecological niche than their adult (eco‐larva s. l.); (d) have a different ecological niche than their adult and additionally fulfil a dispersal function (eco‐larva s. str.); (e) transform by a metamorphosis to the non‐larval immature or adult (metamorph‐larva); (f) differ from the adult by having evolved new structures in the early stages (apo‐larva); (g) differ from the adult as the adult has evolved new structures (plesio‐larva). The differentiation of these criteria will provide a more precise reference reducing possible misunderstanding and allowing a more precise communication.

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A possible hatchling of a jumping bristletail in 50 million years old amber

Cited by 7 publications

References 0 publications

An unusual 100-million-year old holometabolan larva with a piercing mouth cone

An unusual 100-million-year old holometabolan larva with a piercing mouth cone

Caught in the act of hatching – a group of heteropteran nymphs escaping from their eggs preserved in Dominican amber

Why the term “larva” is ambiguous, or what makes a larva?

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