Cetoniinae

Vondráček, Dominik, Hadjiconstantis, Michael & Šípek, Petr, 2018, Immature stages of the genus Oxythyrea (Coleoptera: Scarabaeidae: Cetoniinae) with a key to third instar larvae, and notes on the biology of the genus, Zootaxa 4486 (4), pp. 401-434: 422-423

publication ID

https://doi.org/10.11646/zootaxa.4486.4.1

publication LSID

lsid:zoobank.org:pub:7652EE8A-437B-4A61-ACF6-4A3BF6553808

persistent identifier

http://treatment.plazi.org/id/03CA879D-6225-6619-43A7-F8A0FA08FDB0

treatment provided by

Plazi

scientific name

Cetoniinae
status

 

Key to the larval instars of Cetoniinae 

Note: We provided this key to be sure, that readers of this work will be able to distinguish third instar larvae (L3) of Cetoniinae  from other instars (L1, L2), because L3 of smaller species (e.g. Oxythyrea  ) can be the same size as L1 and L2 of some bigger species (e.g. Protaetia  sp. Burmeister, 1842). Almost all descriptions of Scarabaeidae  larvae are based on the third instar larva, but some of key morphological structures (e.g. raster) are not fully developed only in early instars (e.g. Šípek et al. 2012b). Therefore, the correct identification of larval instar is necessary. The characteristic given here are mostly based on unpublished material collected by the authors (pers. observation), as published data on the early stages larvae (L1, L2) of the Cetoniinae  is missing ( Šípek et al. 2012b).

1 Respiratory plate of (thoracic) spiracle oval or round, bullar opening narrow and tiny, respiratory plate covering almost entire area of the spiracle ( Fig. 13 AView FIGURE 13)................................................................ first instar larva 

- Thoracic spiracle with well-defined c-shaped respiratory plate and well-developed bulla............................. 2

2 Thoracic spiracle with bulla without ecdysial scar ( Fig. 13BView FIGURE 13), if ecdysial scar present ( Fig. 13CView FIGURE 13) then pali slender, distinctly shorter and less sclerotized when compared to tegillar setae ( Fig. 13IView FIGURE 13; compare with Fig. 13JView FIGURE 13). Not aplicable for species without distinctly developed raster (rows of pali), i. e. in Europe for larvae of the genus Osmoderma LePeletier & Audinet-Serville, 1828  ..................................................................................... 2nd instar larva

- Thoracic spiracle with well-developed bulla and well-developed ecdysial scar ( Fig. 13CView FIGURE 13), pali of raster normally developed ( Fig. 13JView FIGURE 13)................................................................................third instar larva