@article {64,
	title = {Diversity of Anisoptera (Odonata): infering speciation processes from patterns of morphological diversity},
	journal = {Zoology (Jena)},
	volume = {105},
	number = {4},
	year = {2002},
	pages = {355-65},
	abstract = {With roughly 2500 described species Anisoptera are among the species-poor suborders within insects. However, morphological and ecological variability are truly impressive. Anisoptera are classified into about 15 families of variable species richness. In this analysis phylogenetic research is integrated with comparative approaches to investigate possible explanations of differential speciation rates within this suborder. A short review of phylogenetic work based on morphological characters is compared to published molecular phylogenies. Sistergroup comparisons are used to elucidate whether a) sexual selection, b) duration of life cycles, or c) differentiation in body size, have had a detectable effect on speciation rate. In all three analyses effects of distributional range and latitudinal distribution were controlled. These analyses suggest sexual selection promotes speciation and an increase in body size is positively correlated with speciation rate. The evolutionary significance of these results is discussed and experimental approaches that should advance our understanding of anisopteran diversity are suggested.},
	author = {Misof, Bernhard}
}
@article {43,
	title = {Mechanical properties of the endophytic ovipositor in damselflies (Zygoptera, Odonata) and their oviposition substrates},
	journal = {Zoology (Jena)},
	volume = {110},
	number = {3},
	year = {2007},
	pages = {167-75},
	abstract = {Damselfly females use their ovipositor valves to saw aquatic plants in order to insert their eggs into the plant tissues. Stiffness of the plant substrata is therefore an important parameter for oviposition substrate choice by females. Using a force transducer combined with a motorised micromanipulator, the bending stiffness of the ovipositor at the axial compressional load was studied in seven European damselfly species and compared to the local stiffness of seven preferred plant substrates. The puncture force of tested plant samples ranged from 105 to 1500 mN, and their local stiffness ranged from 208 to 1776 N/m. The bending stiffness of the ovipositor was estimated as 173-409 N/m depending on the damselfly species. Using original and literature data, a significant positive correlation between mechanical properties of the ovipositor and preferred oviposition substrates was demonstrated. Possible behavioural adaptations to overcome high stiffness of plant tissues during oviposition are discussed.},
	author = {Matushkina, Nataly and Gorb, Stanislav}
}
