Deep-sea barnacles (Cirripedia: Thoracica) of southern Vietnam

Abstract

With 7 Text-figures SYNOPSIS The deep-sea barnacles Pachylasma and Hexelasma are little known and a few species have been sporadically recorded from isolated localities of all oceans. Of the genus Pachylasma, only two species P. crinoidophilum PrLSBRY and P.japonicum HrRo have been known from Japan. A third species P. scutistriatum BROCH is newly added to the Japanese fauna. The other known species, P. ecaudatum HrRo formerly referred to Pachylasma, is now transferred to the genus Hexelasma, of which two species H. velutinum HoEK and H. callistoderma PILSBRY only have been so far known from Japan. An attempt to subdivide the family Chthamalidae into three subfamilies (Catophragminae, Chthamalinae and Pachylasminae) is newly presented. Syste~natic Account of the Japanese Species (Revised) Genus Pachylasma DARWIN, 1854 Diagnosis. Chthamalidae having a wall of eight compartments, in which the rostrum and rostrolaterals are united by inconspicuous, linear sutures, or are wholly con-crescent in the adult stage, the wall thus becoming virtually six-plated. Radii wanting or very narrow and not well differentiated from the parietes. Wall-plates non-porous, not ribbed on the inner surface in adults. Basis essentially membranous but often secondarily calcified in adults. Scutum without an adductor ridge and a pit for lateral depressor muscle. Caudal appendages present. Labrum without a median notch. Mandible with three teeth and a pectinated lower angle. Living in deep-sea. Type species. Pachylasma giganteum (PHILIPPI, 1836) (Original designation by DARWIN, 1854) 1)

Diversity of intertidal, epibiotic, and fouling barnacles (Cirripedia, Thoracica) from Gujarat, northwest India

“…Worldwide distribution. This species has been reported from South Africa, East China Sea, South China Sea, Japan, the Philippines, Indonesia (Chan 2009), Vietnam (Poltarukha 2010) and India (Krishnamoorthy 2007). (Darwin, 1854), top view, (BD: 12.38 mm) LFSc.ZRC-181, external and internal views of scutum and tergum G Amphibalanus reticulatus (Utinomi, 1967), top view, (BD: 14.99 mm) LFSc.ZRC-158, external and internal views of scutum and tergum H Chelonibia testudinaria (Linnaeus, 1758) on crab Portunus sanguinolentus I Chelonibia testudinaria (Linnaeus, 1758), top view (BD: 5.33 mm) LFSc.ZRC-159, internal view of scutum and tergum J Lepas anatifera Linnaeus, 1758, (CL: 16.39 Distribution in India.…”

Integrative Taxonomy Reveals Two New Species of Stalked Barnacle (Cirripedia, Thoracica) From Seamounts of the Western Pacific With a Review of Barnacles Distributed in Seamounts Worldwide

“…Of the 18,153 records in the OBIS database (i.e., the Seamounts Online version 2005-1 data set), we only found 196 referring to barnacles, and some names of taxa are invalid from the current taxonomic schedule. Compiling from the OBIS database and other publications (Zullo and Newman, 1964;Rao and Newman, 1972;Newman, 1979;Zevina, 1981aZevina, , 1983Jones, 1993;Young, 1998aYoung, ,b, 1999Young, , 2001Young, , 2002Buckeridge, 2000Buckeridge, , 2009Southward and Jones, 2003;Stocks, 2004;Tunnicliffe and Southward, 2004;Yamaguchi et al, 2004;Southward, 2005;Mironov and Krylova, 2006;Poltarukha and Zevina, 2006;Newman and Jones, 2011;Buckeridge et al, 2013;Kolbasov et al, 2017;Lobo and Tuaty-Guerra, 2017), there are approximately 125 barnacle species distributed in seamounts up to now, including the present two new species (Supplementary Table 2), and most occurrence records focus on the seamounts in the eastern and western regions of the Pacific Ocean (Figure 1). The family Scalpellidae is the dominant group, with 31 species distributed in seamounts, and the Meteor seamounts have the greatest number of barnacle species: about 12.…”