Redescription of the enigmatic jellyfish,Crambionella annandalei(Cnidaria: Scyphozoa) from Indian waters

Abstract

The catostylid jellyfish, Crambionella annandalei was originally described by Rao (1932) based on a preserved specimen collected from the Andaman Sea. Since then, no detailed taxonomic studies have been conducted and the species is often misidentified. Here, we provide a detailed morphological re-description of C. annandalei from fresh material collected at a variety of locations along the east coast of India. The species can be distinguished from its congeners by a combination of morphological characters, the most important of which are the proportion of terminal club length to oral arm length (0.48 ± 0.031), the proportion of the distal portion of the oral arm to naked proximal portion (7.25 ± 0.268) and the body colour. The occurrence of intra-specific colour variation in fresh specimens was also observed in the present study.

Postulating the Modality of Integrative Taxonomy in Describing the Cryptic Congener Pampus griseus (Cuvier) and Systematics of the Genus Pampus (Perciformes: Stromateidae)

“…Multivariate analysis has been widely performed for species identification and discrimination (Takacs, 2012;Marramà and Kriwet, 2017;Behera et al, 2020). The first three principal components or dimensions accounted for 71.7% of the variability in the data as reflected by the eigenvalues of the principal components.…”

Integrative approach for validation of six important fish species inhabiting River Poonch of north-west Himalayan region (India)

“…The multivariate analysis appears to be a practical approach for identifying and understanding evolutionary relationships among fish species. Therefore, it has gained importance in fishery research ( Caillon et al, 2018 ; Behera et al, 2020 ). Cyprinid morphological variation, such as body profile, has rarely been studied ( Bravi et al, 2013 ; Yan et al, 2013 ; Dwivedi et al, 2020 ).…”

Biometry and size distribution of Crambionella annandalei and Chrysaora spp. along the coast of Andhra Pradesh, India

“…On capture, the contents were examined, weighed and sorted to separate jellyfish from other biota. Subsamples of randomly selected medusae were photographed and identified following Behera et al (2020a;b), Morandini and Marques (2010) and Ras et al (2020). Individuals of each species in each subsample were counted and weighed (wet weight) using an electronic balance with a precision of 0.01 g. Numbers of each species per haul were estimated by multiplying the subsample using a raising factor based on medusae subsample weight to total sample weight ratio, which was multiplied by the number of hauls to obtain total individual numbers of each species per sampling day.…”