Latest Articles from ZooKeys Latest 13 Articles from ZooKeys https://zookeys.pensoft.net/ Fri, 29 Mar 2024 11:33:18 +0200 Pensoft FeedCreator https://zookeys.pensoft.net/i/logo.jpg Latest Articles from ZooKeys https://zookeys.pensoft.net/ Diversity of intertidal, epibiotic, and fouling barnacles (Cirripedia, Thoracica) from Gujarat, northwest India https://zookeys.pensoft.net/article/60733/ ZooKeys 1026: 143-178

DOI: 10.3897/zookeys.1026.60733

Authors: Jigneshkumar N. Trivedi, Mahima Doshi, Krupal J. Patel, Benny K. K. Chan

Abstract: The present work studied the diversity of intertidal, epibiotic, and fouling barnacles in the state of Gujarat, northwest India. In total, eleven species belonging to eight genera and five families were recorded in the present study. The Arabian intertidal species Tetraclita ehsani Shahdadi, Chan & Sari, 2011 and Chthamalus barnesi Achituv & Safriel, 1980 are common in the high- and mid-intertidal rocky shores of Gujarat suggesting that the Gujarat barnacle assemblages are similar to the assemblages in the Gulf of Oman Ecoregion. The biogeographical boundary between the Gulf of Oman and Western Indian ecoregions for barnacles should probably extend southward towards the waters adjacent to Mumbai, where Indo-Pacific species of intertidal barnacles dominate. This study provides the first reports of the common widely distributed balanomorph barnacles Striatobalanus tenuis (Hoek, 1883), Tetraclitella karandei Ross, 1971, Amphibalanus reticulatus (Utinomi, 1967), and lepadid barnacle Lepas anatifera Linnaeus, 1758 in Gujarat, as well as of the chthamalid barnacle Chthamalus barnesi in India.

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Research Article Fri, 26 Mar 2021 15:56:53 +0200
An annotated checklist and integrative biodiversity discovery of barnacles (Crustacea, Cirripedia) from the Moluccas, East Indonesia https://zookeys.pensoft.net/article/39044/ ZooKeys 945: 17-83

DOI: 10.3897/zookeys.945.39044

Authors: Pipit Pitriana, Luis Valente, Thomas von Rintelen, Diana S. Jones, Romanus E. Prabowo, Kristina von Rintelen

Abstract: To contribute to the taxonomic knowledge of barnacles in this understudied area, the first checklist of barnacles from the Moluccas is presented, including additional information on morphology, distribution, and substrate as well as molecular data. The species of barnacles from the Moluccas have been determined using morphological analysis and DNA sequences. During 19 field trips conducted between January 2016 and September 2017, 1,513 specimens of 24 species of intertidal and one species of deep-sea barnacles were collected from 51 localities from the islands. Morphological and molecular analysis of the collected material detected members of three families of stalked barnacles and four families of acorn barnacles. In addition to sampling in the field, we also surveyed the literature on barnacles from the Moluccas. In total, our checklist comprises 97 species from the Moluccas including 23 new records, two of them yet to be described species. Results suggest that the Moluccas have a much higher diversity of barnacles than previously known, for example, from the reports of Challenger and Siboga expeditions. For further work, routine application of molecular systematics could aid the detection of cryptic species, while increased sampling of more islands and a taxonomic revision of several groups would likely lead to an even higher number of species than currently known.

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Checklist Fri, 3 Jul 2020 16:57:46 +0300
Morphological and molecular evidence support the intertidal barnacle Octomeris intermedia Nilsson-Cantell, 1921 (Thoracica, Chthamalidae) as a valid species in Indo-Pacific waters https://zookeys.pensoft.net/article/49328/ ZooKeys 914: 1-31

DOI: 10.3897/zookeys.914.49328

Authors: Benny K. K. Chan, Yao Feng Tsao, Monthon Ganmanee

Abstract: Octomeris is a chthamalid intertidal barnacle with eight shell plates. There are currently two species of such barnacles: O. brunnea Darwin, 1854 (type locality in the Philippines), common in the Indo-Pacific region, and O. angulosa Sowerby, 1825, only recorded in South Africa. Octomeris intermedia Nilsson-Cantell, 1921, identified from the Mergui Archipelago in Myanmar, was considered to be conspecific with O. brunnea by Hiro (1939) based on samples collected in Taiwan. The morphological differences in shell and opercular plates between O. brunnea and O. intermedia are believed to be intra-specific variations due to different degrees of shell erosion. In the present study, the genetic and morphological differentiations of Octomeris in the Indo-Pacific region were examined. This study found two molecular clades (with inter-specific differences) based on the divergence in the COI genes, and the species also have distinct geographical distributions. The Octomeris brunnea clade covers samples collected from the Philippines and Taiwan waters and the other clade, which we argue is O. intermedia, is distributed in Phuket and Krabi, Thailand and Langkawi, Malaysia. Phuket and Krabi are located approximately 300 km south of the Mergui Archipelago, the type locality of O. intermedia. The morphology of samples collected from Thailand fits the type description of O. intermedia in Nilsson-Cantell (1921). Our study concludes that O. intermedia is a valid species based on morphological and molecular evidence.

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Research Article Thu, 20 Feb 2020 10:43:45 +0200
Description of a new species of Membranobalanus (Crustacea, Cirripedia) from southern Australia https://zookeys.pensoft.net/article/35421/ ZooKeys 873: 25-42

DOI: 10.3897/zookeys.873.35421

Authors: Andrew M. Hosie, Jane Fromont, Kylie Munyard, Diana S. Jones

Abstract: A new species of sponge-inhabiting barnacle, Membranobalanus porphyrophilus sp. nov., is described herein. This species can be distinguished from all other congeners by a combination of characters, in particular by the shapes of the tergum and scutum and the armament of the cirri. COI sequence data from the type specimens have been lodged with GenBank and a morphological key to the species of Membranobalanus is provided to aid future research. The host of the new species is the southern Australian endemic demosponge Spheciospongia purpurea. The new species of barnacle is thought to be host species specific.

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Research Article Thu, 29 Aug 2019 16:14:52 +0300
Discovery of Neonrosella vitiata (Darwin) and Newmanella spinosus Chan & Cheang (Balanomorpha, Tetraclitidae) from the Andaman Sea, eastern Indian Ocean https://zookeys.pensoft.net/article/30689/ ZooKeys 833: 1-20

DOI: 10.3897/zookeys.833.30689

Authors: Woranop Sukparangsi, Ashitapol Pochai, Chinnakit Wongkunanusorn, Salinee Khachonpisitsak

Abstract: In this present study, distantly related acorn barnacle species in the subfamily Newmanellinae (Cirripedia, Thoracica, Tetraclitidae), including Neonrosella vitiata (Darwin, 1854) and Newmanella spinosus Chan & Cheang, 2016, were discovered in the Andaman Sea of Thailand. Neo. vitiata can be readily distinguished from other newmanellids by shell plate and operculum morphology (external shell, tergum geometry, and pattern of parietal tube) and arthropodal characters (presence of basi-dorsal point at base of penis and triangular spines on cirri, setal type, and mouth parts). Both species were found to share overlapping territories on rocks at the rockweed zone, an area submerged under seawater most of the time throughout the year. This study highlights the first discovery of Neonrosella in the eastern Indian Ocean, whose ultrastructure compared to Newmanella is redescribed and illustrated here based on scanning electron microscopy.

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Research Article Mon, 25 Mar 2019 16:32:49 +0200
A new species of sponge inhabiting barnacle Bryozobia (Archaeobalanidae, Bryozobiinae) in the West Pacific https://zookeys.pensoft.net/article/6894/ ZooKeys 571: 1-20

DOI: 10.3897/zookeys.571.6894

Authors: Meng-Chen Yu, Gregory A. Kolbasov, Benny K.K. Chan

Abstract: This paper describes a new species, Bryozobia rossi sp. n., collected by scuba diving in both Taiwan and Japan. B. rossi sp. n., a member of the subfamily Bryozobiinae (Ross and Newman 1996), has atria and open end portals and a single irregular basal whorl of portals at the same level as basal hemiportals; this morphology varies from all previously described bryozobiines. According to our review of relevant literature, this is the first reported Bryozobia in the Pacific, and this study is the first to describe the morphology of oral cone, cirri, and penis for the genus Bryozobia.

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Research Article Mon, 7 Mar 2016 00:00:00 +0200
Interaction of the tracheal tubules of Scutigera coleoptrata (Chilopoda, Notostigmophora) with glandular structures of the pericardial septum https://zookeys.pensoft.net/article/5540/ ZooKeys 510: 233-242

DOI: 10.3897/zookeys.510.8644

Authors: Gero Hilken, Gregory D. Edgecombe, Carsten H.G. Mueller, Andy Sombke, Christian S. Wirkner, Jörg Rosenberg

Abstract: Notostigmophora (Scutigeromorpha) exhibit a special tracheal system compared to other Chilopoda. The unpaired spiracles are localized medially on the long tergites and open into a wide atrium from which hundreds of tracheal tubules originate and extend into the pericardial sinus. Previous investigators reported that the tracheal tubules float freely in the hemolymph. However, here we show for the first time that the tracheal tubules are anchored to a part of the pericardial septum. Another novel finding is this part of the pericardial septum is structured as an aggregated gland on the basis of its specialized epithelium being formed by hundreds of oligocellular glands. It remains unclear whether the pericardial septum has a differently structure in areas that lack a connection with tracheal tubules. The tracheal tubules come into direct contact with the canal cells of the glands that presumably secrete mucous substances covering the entire luminal cuticle of the tracheal tubules. Connections between tracheae and glands have not been observed in any other arthropods.

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Research Article Tue, 30 Jun 2015 00:00:00 +0300
Species limits and phylogeography of Newportia (Scolopendromorpha) and implications for widespread morphospecies https://zookeys.pensoft.net/article/5525/ ZooKeys 510: 65-77

DOI: 10.3897/zookeys.510.8573

Authors: Gregory Edgecombe, Varpu Vahtera, Gonzalo Giribet, Pipsa Kaunisto

Abstract: The genus Newportia Gervais, 1847, includes some 60 nominal species distributed in the Caribbean islands and from Mexico to central South America. Modern keys to species and subspecies are available, greatly facilitating identification, but some species are based on few specimens and have incomplete documentation of taxonomically-informative characters. In order to explore genetic variability and evolutionary relationships within geographically-widespread morphospecies, specimens of N. (N.) stolli (Pocock, 1896) and N. (N.) divergens Chamberlin, 1922, two nominal species distinguished principally by differences in suture patterns on T1, were sequenced for mitochondrial 16S rRNA and cytochrome c oxidase subunit I (COI) genes from populations in southern Mexico, Guatemala, Honduras and Brazil. N. (N.) stolli is paraphyletic with respect to N. (N.) divergens within a clade from Guatemala, Honduras, and Chiapas (Mexico), most trees being consistent with a single loss of a connection between the anterior transverse suture on T1, whereas specimens of “N. (N.) stolli” from Brazil are not closely allied to those from the Mesomerican type area. The widespread morphospecies N. (N.) monticola Pocock, 1890, was sequenced for the same loci from populations in Costa Rica, Colombia and Brazil, finding that specimens from these areas do not unite as a monophyletic group. Samples of N. (N.) oreina Chamberlin, 1915, from different regions of Mexico form geographic clusters that resolve as each other’s closest relatives. These results suggest that some widespread species of Newportia may be taxa of convenience more so than natural groupings. In several cases geographic proximity fits the phylogeny better than taxonomy, suggesting that non-monophyletic species do not result from use of inappropriate molecular markers. Molecular identification is possible for specimens missing taxonomically informative morphological characters, notably damaged specimens that lack the ultimate leg pair, a protocol that may also apply to other taxonomically difficult genera that are prone to damage (such as Cryptops).

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Research Article Tue, 30 Jun 2015 00:00:00 +0300
Southern hemisphere deep-water stylasterid corals including a new species, Errina labrosa sp. n. (Cnidaria, Hydrozoa, Stylasteridae), with notes on some symbiotic scalpellids (Cirripedia, Thoracica, Scalpellidae) https://zookeys.pensoft.net/article/4510/ ZooKeys 472: 1-25

DOI: 10.3897/zookeys.472.8547

Authors: Daniela Pica, Stephen D. Cairns, Stefania Puce, William A. Newman

Abstract: A number of stylasterid corals are known to act as host species and create refuges for a variety of mobile and sessile organisms, which enhances their habitat complexity. These include annelids, anthozoans, cirripeds, copepods, cyanobacteria, echinoderms, gastropods, hydroids and sponges. Here we report the first evidence of a diverse association between stylasterids and scalpellid pedunculate barnacles and describe a new stylasterid species, Errina labrosa, from the Tristan da Cunha Archipelago. Overall, five stylasterid species are found to host eight scalpellid barnacles from several biogeographic regions in the southern hemisphere (Southern Ocean, temperate South America and the southern Indo-Pacific realms). There is an apparent lack of specificity in this kind of association and different grades of reaction to the symbiosis have been observed in the coral. These records suggest that the association between pedunculate barnacles and hard stylasterid corals has a wide distribution among different biogeographic realms and that it is relatively rare and confined largely to deep water.

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Research Article Mon, 19 Jan 2015 00:00:00 +0200
Intraspecific variation in the turtle barnacle, Cylindrolepas sinica Ren, 1980 (Cirripedia, Thoracica, Coronuloidea), with brief notes on habitat selectivity https://zookeys.pensoft.net/article/3597/ ZooKeys 327: 35-42

DOI: 10.3897/zookeys.327.5732

Authors: Ryota Hayashi

Abstract: Specimens of the turtle barnacle Cylindrolepas sinica Ren, 1980 were collected from sea turtles in Japanese waters. The specimens were hexagonal in shape and were found burrowing into the sea turtle plastron. Specimens were dissected and the hard and soft parts were compared with the original description.

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Research Article Wed, 28 Aug 2013 00:00:00 +0300
Two new species of the gorgonian inhabiting barnacle, Conopea (Crustacea, Cirripedia, Thoracica), from the Gulf of Guinea https://zookeys.pensoft.net/article/3711/ ZooKeys 270: 1-20

DOI: 10.3897/zookeys.270.3736

Authors: Dana Carrison-Stone, Robert Van Syoc, Gary Williams, Brian Simison

Abstract: Two new species of Conopea (Say 1822) are described from the Gulf of Guinea: Conopea saotomensis sp. n. and Conopea fidelis sp. n. These two new species were collected from the historically isolated volcanic islands of São Tomé and Príncipe. The relationship between Conopea saotomensis sp. n., Conopea fidelis sp. n. and two other Atlantic barnacle species, Conopea calceola (Ellis 1758) and Conopea galeata (Linnaeus 1771), is examined. The methods employed are the construction of a molecular phylogeny using mitochondrial COI and nuclear H3 gene sequence data along with morphological comparisons of calcareous and cuticular body parts. It is found that Conopea saotomensis sp. n., Conopea fidelis sp. n. and Conopea calceola are most closely related to each other but the relationship among them is unresolved. Gorgonian hosts are identified. Preliminary observations show species level host specificity for C. fidelis sp. n.

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Research Article Mon, 18 Feb 2013 00:00:00 +0200
Description of a new species of coral-inhabiting barnacle, Darwiniella angularis sp. n. (Cirripedia, Pyrgomatidae) from Taiwan https://zookeys.pensoft.net/article/2975/ ZooKeys 214: 43-74

DOI: 10.3897/zookeys.214.3291

Authors: Yi-Yang Chen, Hsiu-Chin Lin, Benny K.K. Chan

Abstract: The present study has identified a new species from the previously monotypic genus Darwiniella Anderson, 1992. Darwiniella angularis sp. n. is similar to D. conjugatum (Darwin, 1854) in external shell morphology and arthropodal characters. Darwiniella conjugatum, however, has a sharper tergal spur and a less obvious adductor plate angle when compared to D. angularis sp. n. Molecular analyses on mitochondrial DNA 12S rDNA and COI regions also support the morphological differences. Sequence divergences in 12S rDNA and COI between D. conjugatum and D. angularis sp. n. are 5% and 13% respectively, which are equivalent to the inter-specific sequence divergences in other barnacles. Both Darwiniella species are common on Cyphastrea Milne-Edwards and Haime, 1848 corals and D. angularis sp. n. is also collected from Astreopora de Blainville, 1830 corals in Taiwan.=

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Research Article Tue, 7 Aug 2012 00:00:00 +0300
Tetraclita ehsani sp. n. (Cirripedia, Tetraclitidae), a common intertidal barnacle from the Gulf of Oman, Iran https://zookeys.pensoft.net/article/2825/ ZooKeys 136: 1-12

DOI: 10.3897/zookeys.136.1772

Authors: Adnan Shahdadi, Benny K.K. Chan, Alireza Sari

Abstract: A new species of intertidal acorn barnacle Tetraclita ehsani sp. n. was identified from the Iranian coast in the Gulf of Oman. T. ehsani sp. n. inhabits low exposed rocky shores and also attaches to shells of molluscs and the barnacle Megabalanus species. Parietes of T. ehsani ranged from white to pink which is different from T. serrata (in South African waters), which has green parietes. Morphology of the tergum and cirrus III of T. ehsani sp. n. is distinctive from other described West Indian Ocean species which have pink or white parietes (T. rufotincta, T. achituvi and T. reni). The tergum of T. ehsani is very narrow and the basal margin is slightly concave or straight, in contrast to T. rufotincta and T. reni, in which the tergum are board and with a very concave basal margin. Cirrus I anterior ramus of both T. ehsani and T. reni is antenniform and thus differing from the cirrus I of T. rufotincta (see Chan et al. 2009). Cirrus III of T. ehsani sp. n. is non-antenniform and lacks multicuspidate type setae, which is different from T. reni byan antenniform cirrus III and with multicuspidate setae.

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Research Article Thu, 13 Oct 2011 00:00:00 +0300