The rare Calappa tuerkayana Pastore, 1995 is a juvenile stage of the common Calappa granulata (Linnaeus, 1758) (Brachyura: Calappidae)

Innocenti, Giacomo; Fratini, Sara; Tiralongo, Francesco; Natali, Chiara; Crocetta, Fabio

doi:10.1016/j.jcz.2021.04.007

Cited by 1 publication

(5 citation statements)

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“…Here we report 11 new mtCOI sequences for Calappa granulata from the eastern Adriatic Sea, the first sequences contributed from this geographical location. We have observed large haplotype and low nucleotide diversity, similar to what has been found for this species in the Mediterranean [26]. Genetic heterogeneity is commonly considered a sign of a healthy population, although this case requires further investigation.…”

Section: Discussionsupporting

confidence: 86%

“…To what extent this applies to C. granulata remains to be seen. The phylogeny and species delineation within the genus Calappa has not yet been completely resolved [26,89,90]. Innocenti et al [26] present morphological and genetic evidence (p-distances of 0.49% using the mtCOI marker, with a threshold for interspecies differentiation being 2%) that the previous C. tuerkayana is a juvenile stage of C. granulata.…”

Section: Discussionmentioning

confidence: 99%

“…The phylogeny and species delineation within the genus Calappa has not yet been completely resolved [26,89,90]. Innocenti et al [26] present morphological and genetic evidence (p-distances of 0.49% using the mtCOI marker, with a threshold for interspecies differentiation being 2%) that the previous C. tuerkayana is a juvenile stage of C. granulata. Using Bayesian phylogenetic inference, we reconstruct a single well-supported clade of Adriatic and Mediterranean sequences from Innocenti et al [26], supporting the identity of C. granulata in the central eastern Adriatic Sea.…”

Section: Discussionmentioning

confidence: 99%

“…Innocenti et al [26] present morphological and genetic evidence (p-distances of 0.49% using the mtCOI marker, with a threshold for interspecies differentiation being 2%) that the previous C. tuerkayana is a juvenile stage of C. granulata. Using Bayesian phylogenetic inference, we reconstruct a single well-supported clade of Adriatic and Mediterranean sequences from Innocenti et al [26], supporting the identity of C. granulata in the central eastern Adriatic Sea. In an era of rapidly declining biodiversity, it is important to constantly populate DNA barcoding databases with new sequencing data to facilitate molecular identification and genetic diversity analyses, especially for not-well-investigated species.…”

Section: Discussionmentioning

confidence: 99%

“…Equally, genetic structure, diversity and connectivity patterns have not been well studied in this species. Innocenti et al [26] reported high haplotype and low nucleotide diversity of C. granulata in the Mediterranean basin (Tyrrhenian and Ionian Sea); however, the primary objective of this study was to clarify species status of C. tuerkayana. Using morphological and genetic approaches in the analyses of historical and recent samples, the authors have concluded that C. tuerkayana is in fact a juvenile stage of C. granulata, and not a separate species as indicated in the literature.…”

Section: Introductionmentioning

confidence: 87%

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Revealing the Shamefaced Crab Calappa granulata (Crustacea: Brachyura) from the Adriatic Sea, Northern Basin of the Mediterranean

Petrić

Mihaljević

Brčić

et al. 2022

JMSE

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This study presents the first data on morphometry, length–weight relationship, diet, reproductive biology, epibionts and genetic identity of the shamefaced crab Calappa granulata from the central eastern Adriatic Sea. A total of 92 crabs were collected during 2011, 2014 and 2015, of which 64 were females and 28 were males. Overall, 11 morphometric characteristics were measured. Carapace length of sampled individuals ranged from 48.46 to 76.09 mm, and body weight from 47.06 to 221.39 g. The length–weight relationship showed negative allometry for males and isometric growth for females. Analysis of the stomach content revealed the crab’s preference for crustaceans (20.28%) and cephalopods (10.58%), less for fish (3.4%) and shellfish (0.28%). Size at first sexual maturity (CL50%) of 59.25 and 66.92 mm was estimated for males and females, respectively. Epibiotic serpulid polychaetes were recorded on the crab exoskeleton with an overall prevalence of 29.3%. Analyses of a partial sequence of mtCOI showed high haplotype (Hd = 0.964) and low nucleotide diversity (π = 0.00598). Phylogenetic inference and estimation of population differentiation (FST = 0.013, p = 0.271) with publicly available Mediterranean sequences currently imply one homogenous population unit. To the best of our knowledge, these are the first nucleotide sequences of C. granulata from the Adriatic Sea made publicly available.

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Section: Discussionsupporting

confidence: 86%