Ceraeochrysa placita (Neuroptera: Chrysopidae): generic characteristics of larvae, larval descriptions, and life cycle

The 3 instars of Ceraeochrysa placita (Banks) express all the traits that typify trashcarrying lacewing larvae in the tribe Chrysopini: short, broad bodies; thorax with elongate, setaceous tubercles; abdomen humped, bearing hooked setae dorsally. Based on our comparison of C. placita larvae with des...

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Bibliographic Details
Published in:	Annals of the Entomological Society of America Vol. 91; no. 5; pp. 608 - 618
Main Authors:	Tauber, C.A. (Cornell University, Ithaca, NY.), De Leon, T, Arroyo, J.I.L, Tauber, M.J
Format:	Journal Article
Language:	English
Published:	Oxford, UK Oxford University Press 01-09-1998 Entomological Society of America
Subjects:	Biological and medical sciences BIOLOGICAL DEVELOPMENT CALIFORNIA Ceraeochrysa placita CHRYSOPIDAE DIAPAUSE Fundamental and applied biological sciences. Psychology Insecta Invertebrates LARVAE LIFE CYCLE MORPHOLOGY NEW YORK OVERWINTERING OVIPOSITION PHOTOPERIODICITY Systematics. Geographical distribution TAXONOMY Canada North America America diapause development larval morphology photoperiod oviposition Chrysopidae Life history Taxonomy Insecta Interspecific comparison Diapause Overwintering Environmental factor Photoperiod Survival Neuroptera Larva Arthropoda Morphology Development Invertebrata
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Summary:	The 3 instars of Ceraeochrysa placita (Banks) express all the traits that typify trashcarrying lacewing larvae in the tribe Chrysopini: short, broad bodies; thorax with elongate, setaceous tubercles; abdomen humped, bearing hooked setae dorsally. Based on our comparison of C. placita larvae with descriptions of larvae in other trash-carrying chrysopine genera, we propose a tentative definition of Ceraeochrysa larvae. In addition, to aid in identifying C. placita larvae, we list a series of traits that distinguishes C. placita from previously described New World trash-carrying chrysopines. One of these traits appears unique to C. placita: in addition to the 2 or 3 long setae that typically occur at the apex of the dorsolateral thoracic tubercles of all chrysopine 1st instars, on C. placita each tubercle also bears a short, stout seta apically. Whether this trait is apomorphic for Ceraeochrysa, or for C. placita, is an open question. Finally, we present a series of biological traits that distinguishes C. placita. Eggs are laid on the trunks of medium- to large-sized trees, which are also feeding sites for prediapause larvae. It has a univoltine life cycle, and the 2nd instar is the overwintering stage. Photoperiod strongly influences the life cycle; short daylengths retard development in 1st instars, induce diapause in 2nd instars, and may have a role in postdiapause development. Compared with other chrysopids, C. placita's incubation and preoviposition periods are long.
Bibliography:	L40 L20 1997083858 L60 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0013-8746 1938-2901
DOI:	10.1093/aesa/91.5.608