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VOL. 9, ISSUE 12 (2024)
Chromosomal characteristics of Orthezia insignis browne (Hemiptera: Coccoidea: Ortheziidae)
Authors
Kokilamani AL, S Ramakrishna, G Venkatachalaiah
Abstract
Ortheziidae is one of the primitive extant families of scale insects
(Coccoidea). One of the species like Ortehzia insignis Browne, commonly
known as Lantana bug/ Jacaranda bug was subjected to cytological
investigations through advanced air-drying, C-, and NOR banding techniques. The
cytological preparation has revealed the chromosome number for the species was
2n = 8. The somatic metaphase chromosomal complement consisting of two longer
metacentric chromosomes (#1 and 2) in which each appear distinct and could
easily be identifiable, whereas third was a metacentric and the fourth an
acrocentric chromosome. It was difficult to differentiate individual sexes
based on the chromosomal morphology. No discernible sex chromosomes were found,
and males and females appear to have the same chromosomal constitution and no
heterochromatization. The cytological study on this species is of its first
kind and this provides a baseline data for further studies. Dark C- bands were
noticed in the metacentric region of the 1st and 2nd pair
of the chromosomes, while in 3rd pair it was located from one of the
telomeric regions. Silver nitrate staining preparation revealed the presence of
a prominent NOR-band at the penultimate end of one of the telomeric regions of
fourth pair of Chromosome. The cytological study on this species is of its
first kind and this provides a baseline data for further studies.
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Pages:31-33
How to cite this article:
Kokilamani AL, S Ramakrishna, G Venkatachalaiah "Chromosomal characteristics of <i>Orthezia insignis</i> browne (Hemiptera: Coccoidea: Ortheziidae)". International Journal of Entomology Research, Vol 9, Issue 12, 2024, Pages 31-33
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