Abstract
Morphometric analyses on the immature stages of Anisops breddini Kirkaldy (Hemiptera: Notonectidae) was done by collecting insects from the field. Measurements of 36 characters of nymphal instars I-V were taken based on ten individuals of each developmental stage. Morphometric measurements of vertex (V), synthlipsis (S) and head length (HL) in instars I-V revealed a uniform pattern of development. Twenty nine morphometric ratios were analyzed by using one-way analysis of variance (ANOVA), principal component analysis (PCA) and varimax rotation to identify the important morphometric ratios for characterization of instars I-V. The variations in each morphometric ratio among the developmental stages were found statistically significant. ANOVA and PCA have revealed that ratios of synthlipsis to vertex (S/V), synthlipsis to head width (S/HW) and length of rostrum segment four to rostrum length (R4L/RL) are useful morphometric ratios for description and separation of instars I-V. However, instar I can be easily distinguished from rest by the absence of wing pad.
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First author would like to thank the Department of Science and Technology, Government of India, for providing INSPIRE fellowship (IF140595).
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Chanu, C.M., Gupta, S. & Gupta, A. Multivariate morphometrics of the immature stages of Anisops breddini Kirkaldy (Hemiptera: Notonectidae). Int J Trop Insect Sci 41, 991–998 (2021). https://doi.org/10.1007/s42690-020-00280-y
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DOI: https://doi.org/10.1007/s42690-020-00280-y