RECORD OF THE BARNACLE OCTOLASMISANGULATA (AURIVILLIUS, 1894) FROM THE GILLS OF THE CRAB PORTUNUS SEGNIS (FORSKÅL, 1775) OF IRAQI MARINE WATERS

Thamir Adday,Abdul Al-Amer Jassim,Akeel Al-Waely

doi:10.26842/binhm.7.2019.15.3.0225

Thamir Adday, Abdul Al-Amer Jassim + Show 1 more

Open Access

https://doi.org/10.26842/binhm.7.2019.15.3.0225

Copy DOI

Abstract

Ten blue swimming crabs Portunus segnis (Forskal, 1775) were collected from the north west of the Arabian Gulf off the Iraqi marine waters from October to November 2017 at 29ᵒ 37′ N to 48ᵒ 47′ E. The barnacle Octolasmis angulata (Aurivillius, 1894) was found on the gills of the present species of crab, the mean incidence of infestation was 30%, while the mean Intensity of infestation was 12.3. The barnacle have a long and slim shaped calcareous plate with the presence of carina and the absence of tergum, in addition to the elongated shape of carina and scutum. The current study represents the first record of the barnacle O. angulata in the Arabian Gulf.

Highlights

Cirripedia are crustaceans belonging to the maxillipoda which using the first antenna as an attachment organ (Debelius, 2001); the malacostraca is the largest and most diverse groups and is divided into 14 orders, with over 20000 species, marine, freshwater, terrestrial, benthic, scavengers and predators
Subtropical and tropical coastal waters of the world pedunculate barnacles of the genus Octolasmis are frequently found on decapod crustaceans, the stalked barnacles of the genus Octolasmis are sessile crustaceans frequently found attached to the decapods mainly in the branchial chamber of the crabs (Jeffries and Voris, 1996)
The specimens were frozen for laboratory analysis; the brachyurans were identified according to Lai et al (2010); the cirripedes were carefully removed from the gills of the crabs by forceps; the dorsal carapace of the crabs was removed to inspect epibionts in the branchial chambers

Summary

Introduction

Cirripedia are crustaceans belonging to the maxillipoda which using the first antenna as an attachment organ (Debelius, 2001); the malacostraca is the largest and most diverse groups and is divided into 14 orders, with over 20000 species, marine, freshwater, terrestrial, benthic, scavengers and predators. The present study represents the first record of the barnacle species O. angulata that found attached on the gill crab P. segnis off the Iraqi waters of the Arabian Gulf.

Results

Conclusion