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Sammy De Grave - One of the best experts on this subject based on the ideXlab platform.
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a new species of ogyrides decapoda Caridea ogyrididae from kuwait
Crustaceana, 2020Co-Authors: Sammy De Grave, Manal Alkandari, Arthur AnkerAbstract:A new species of telescope shrimp, Ogyrides sindibadi sp. nov. is described from Kuwait. The new species is morphologically similar to O. striaticauda Kemp, 1915, originally described from Chilka Lake (India), but can be distinguished by the shape of the scaphocerite, the much longer dactylus of the third pereiopod, as well as the shape of the distal margin of the telson.
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two new species of hippolyte from the tropical central and east atlantic crustacea decapoda Caridea
Zootaxa, 2019Co-Authors: Charles H. J. M. Fransen, Sammy De GraveAbstract:Two new species of the Caridean shrimp genus Hippolyte Leach, 1814 [in Leach, 1813-14] are described from the Tropical Central and East Atlantic. Hippolyte cedrici sp. nov., from Principe and Sao Tome, can be distinguished from both the related H. holthuisi Zariquey Alvarez, 1953 and H. varians Leach, 1814 on the basis of rostral dentition, as well as meristics of the ambulatory pereiopods. Hippolyte karenae sp. nov., from St. Helena, is morphologically similar to H. coerulescens (Fabricius, 1775) and H. obliquimanus Dana, 1852, by having a well-developed tooth on the outer angle of the first peduncular article of the antennula. It differs from these species, amongst other characters, primarily in the armature of the ambulatory dactyli. Specimens were collected from hydrozoan, antipatharian and alcyonarian cnidarians.
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molecular phylogeny of pasiphaeidae crustacea decapoda Caridea reveals systematic incongruence of the current classification
Molecular Phylogenetics and Evolution, 2017Co-Authors: Yunshi Liao, Sammy De Grave, Tinyam Chan, Ling Ming Tsang, Ka Hou ChuAbstract:Caridean shrimps constitute one of the most diverse groups of decapod crustaceans, notwithstanding their poorly resolved infraordinal relationships. One of the systematically controversial families in Caridea is the predominantly pelagic Pasiphaeidae, comprises 101 species in seven genera. Pasiphaeidae species exhibit high morphological disparity, as well as ecological niche width, inhabiting shallow to very deep waters (>4000m). The present work presents the first molecular phylogeny of the family, based on a combined dataset of six mitochondrial and nuclear gene markers (12S rDNA, 16S rDNA, histone 3, sodium-potassium ATPase α-subunit, enolase and ATP synthase β-subunit) from 33 species belonged to six genera of Pasiphaeidae with 19 species from 12 other Caridean families as outgroup taxa. Maximum likelihood and Bayesian inference analyses conducted on the concatenated dataset of 2265bp suggest the family Pasiphaeidae is not monophyletic, with Psathyrocaris more closely related to other Carideans than to the other five pasiphaeid genera included in this analysis. Leptochela occupies a sister position to the remaining genera and is genetically quite distant from them. At the generic level, the analysis supports the monophyly of Pasiphaea, Leptochela and Psathyrocaris, while Eupasiphae is shown to be paraphyletic, closely related to Parapasiphae and Glyphus. The present molecular result strongly implies that certain morphological characters used in the present systematic delineation within Pasiphaeidae may not be synapomorphies and the classification within the family needs to be urgently revised.
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presumed filter feeding in a deep sea benthic shrimp decapoda Caridea stylodactylidae with records of the deepest occurrence of Carideans
ZooKeys, 2017Co-Authors: Mary K Wicksten, Sammy De Grave, Christopher KelleyAbstract:Using the remotely operated vehicle Deep Discoverer, we observed a large stylodactylid shrimp resting on a sedimented sea floor at 4826 m in the Marianas Trench Marine National Monument. The shrimp was not collected but most closely resembled Bathystylodactylus bathyalis, known previously only from a single broken specimen. Video footage shows the shrimp facing into the current and extending its upraised and fringed first and second pereopods, presumably capturing passing particles. The video footage is the first ever to show a living deep-sea stylodactylid and constitutes the deepest record for the family. We provide a list of the deepest reports of Caridean shrimps world-wide.
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phylogenetics reveals the crustacean order amphionidacea to be larval shrimps decapoda Caridea
Scientific Reports, 2015Co-Authors: Sammy De Grave, Tinyam Chan, Ka Hou Chu, Chienhui Yang, Jose Maria LandeiraAbstract:We present evidence that the single representative of the crustacean order Amphionidacea is a decapod shrimp and not a distinct order. After reviewing available morphological evidence, it is concluded that Amphionides is a larval form, but with an as yet unknown parentage. Although the most likely adult form is in the family Pandalidae, the limited molecular data available cannot fully resolve its affinity. We therefore propose to treat Amphionides reynaudii as incertae sedis within Caridea, rather than a separate family. In view of the large scale, tropical and subtropical distribution of the taxon, the possibility is discussed that Amphionides is more likely to be a composite taxon at generic level, rather than larvae of a single shrimp species.
Tinyam Chan - One of the best experts on this subject based on the ideXlab platform.
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molecular phylogeny of pasiphaeidae crustacea decapoda Caridea reveals systematic incongruence of the current classification
Molecular Phylogenetics and Evolution, 2017Co-Authors: Yunshi Liao, Sammy De Grave, Tinyam Chan, Ling Ming Tsang, Ka Hou ChuAbstract:Caridean shrimps constitute one of the most diverse groups of decapod crustaceans, notwithstanding their poorly resolved infraordinal relationships. One of the systematically controversial families in Caridea is the predominantly pelagic Pasiphaeidae, comprises 101 species in seven genera. Pasiphaeidae species exhibit high morphological disparity, as well as ecological niche width, inhabiting shallow to very deep waters (>4000m). The present work presents the first molecular phylogeny of the family, based on a combined dataset of six mitochondrial and nuclear gene markers (12S rDNA, 16S rDNA, histone 3, sodium-potassium ATPase α-subunit, enolase and ATP synthase β-subunit) from 33 species belonged to six genera of Pasiphaeidae with 19 species from 12 other Caridean families as outgroup taxa. Maximum likelihood and Bayesian inference analyses conducted on the concatenated dataset of 2265bp suggest the family Pasiphaeidae is not monophyletic, with Psathyrocaris more closely related to other Carideans than to the other five pasiphaeid genera included in this analysis. Leptochela occupies a sister position to the remaining genera and is genetically quite distant from them. At the generic level, the analysis supports the monophyly of Pasiphaea, Leptochela and Psathyrocaris, while Eupasiphae is shown to be paraphyletic, closely related to Parapasiphae and Glyphus. The present molecular result strongly implies that certain morphological characters used in the present systematic delineation within Pasiphaeidae may not be synapomorphies and the classification within the family needs to be urgently revised.
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phylogenetics reveals the crustacean order amphionidacea to be larval shrimps decapoda Caridea
Scientific Reports, 2015Co-Authors: Sammy De Grave, Tinyam Chan, Ka Hou Chu, Chienhui Yang, Jose Maria LandeiraAbstract:We present evidence that the single representative of the crustacean order Amphionidacea is a decapod shrimp and not a distinct order. After reviewing available morphological evidence, it is concluded that Amphionides is a larval form, but with an as yet unknown parentage. Although the most likely adult form is in the family Pandalidae, the limited molecular data available cannot fully resolve its affinity. We therefore propose to treat Amphionides reynaudii as incertae sedis within Caridea, rather than a separate family. In view of the large scale, tropical and subtropical distribution of the taxon, the possibility is discussed that Amphionides is more likely to be a composite taxon at generic level, rather than larvae of a single shrimp species.
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unweaving hippolytoid systematics crustacea decapoda hippolytidae resurrection of several families
Zoologica Scripta, 2014Co-Authors: Sammy De Grave, Ling Ming Tsang, Ka Hou Chu, Tinyam ChanAbstract:The Hippolytidae is the fourth largest family within the Caridea, currently containing over 330 described species in 37 genera, and the classification of this family has been rather controversial. In this study, sequences of two nuclear protein-coding genes, enolase and sodium-potassium ATPase α-subunit, and the mitochondrial 16S rRNA gene (totalling 1405 bp) from 29 hippolytid species in 20 genera plus 17 species from eight other Caridean families were used to examine the phylogenetic status of Hippolytidae sensu lato. Our results clearly reject the monophyly of Hippolytidae and support the recognition of the Lysmatidae Dana, 1852, Thoridae Kingsley, 1879, Bythocarididae Christoffersen 1987 and Merguiidae Christoffersen 1990.
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molecular phylogeny of the superfamily palaemonoidea crustacea decapoda Caridea based on mitochondrial and nuclear dna reveals discrepancies with the current classification
Invertebrate Systematics, 2013Co-Authors: Qi Kou, Tinyam Chan, Ka Hou Chu, Zhibin GanAbstract:Palaemonoidea is one of the most speciose superfamilies of Caridea. Since it was established, several classification schemes of Palaemonoidea have been proposed and modified. However, the current classification of Palaemonoidea is still in dispute. In this study, one mitochondrial gene (16S rRNA) and three nuclear genes (histone 3, 18S rRNA and 28S rRNA) were used to explore the phylogenetic relationships among the subgroups of the superfamily Palaemonoidea, including seven families with 25 affiliated genera. Based on the combined data with both maximum likelihood and Bayesian inference analyses, the results support the monophyly of Anchistioididae and Hymenoceridae. In contrast, Gnathophyllidae is suggested to be paraphyletic and Palaemonidae is shown to be a polyphyletic group. Our analyses reveal that the subfamily Palaemoninae could be approximately divided into three clades, and the branchiostegal groove is the probable morphological evidence of the environmental transition from sea to fresh water. Besides, for some of the Palaemonoidea families, their taxonomic status is obscure. A revision of Palaemonoidea and a re-evaluation of its constituent taxa appear to be necessary even though the systematic status of the subfamily Pontoniinae is still undetermined.
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bathypelagic shrimp of the genus pasiphaea decapoda Caridea pasiphaeidae from waters around taiwan with descriptions of four new species
Journal of Crustacean Biology, 2012Co-Authors: Tomoyuki Komai, Chiawei Lin, Tinyam ChanAbstract:The bathypelagic shrimp genus Pasiphaea Savigny, 1816 (Caridea: Pasiphaeidae) has been previously known from Taiwan from only three species. However, recent deep-sea surveys around the island have collected numerous specimens comprising ten species, of which four are new to science: P. aequus n. sp., P. alcocki (Wood-Mason and Alcock, 1891), P. exilimanus n. sp., P. falx n. sp., P. japonica Omori, 1976, P. mclaughlinae Hayashi, 2006, P. levicarinata Hanamura, 1994, P. orientalis Schmitt, 1931, P. sirenkoi Burukovsky, 1987 and P. taiwanica n. sp. The four new species are fully described and illustrated, and compared with allied congeners. Pasiphaea orientalis is redescribed, as this species is endemic to Taiwan and its original description is inadequate. Amongst the three new records of Taiwan, P. levicarinata is also recorded for the first time from the northwestern Pacific.
Ka Hou Chu - One of the best experts on this subject based on the ideXlab platform.
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molecular phylogeny of pasiphaeidae crustacea decapoda Caridea reveals systematic incongruence of the current classification
Molecular Phylogenetics and Evolution, 2017Co-Authors: Yunshi Liao, Sammy De Grave, Tinyam Chan, Ling Ming Tsang, Ka Hou ChuAbstract:Caridean shrimps constitute one of the most diverse groups of decapod crustaceans, notwithstanding their poorly resolved infraordinal relationships. One of the systematically controversial families in Caridea is the predominantly pelagic Pasiphaeidae, comprises 101 species in seven genera. Pasiphaeidae species exhibit high morphological disparity, as well as ecological niche width, inhabiting shallow to very deep waters (>4000m). The present work presents the first molecular phylogeny of the family, based on a combined dataset of six mitochondrial and nuclear gene markers (12S rDNA, 16S rDNA, histone 3, sodium-potassium ATPase α-subunit, enolase and ATP synthase β-subunit) from 33 species belonged to six genera of Pasiphaeidae with 19 species from 12 other Caridean families as outgroup taxa. Maximum likelihood and Bayesian inference analyses conducted on the concatenated dataset of 2265bp suggest the family Pasiphaeidae is not monophyletic, with Psathyrocaris more closely related to other Carideans than to the other five pasiphaeid genera included in this analysis. Leptochela occupies a sister position to the remaining genera and is genetically quite distant from them. At the generic level, the analysis supports the monophyly of Pasiphaea, Leptochela and Psathyrocaris, while Eupasiphae is shown to be paraphyletic, closely related to Parapasiphae and Glyphus. The present molecular result strongly implies that certain morphological characters used in the present systematic delineation within Pasiphaeidae may not be synapomorphies and the classification within the family needs to be urgently revised.
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phylogenetics reveals the crustacean order amphionidacea to be larval shrimps decapoda Caridea
Scientific Reports, 2015Co-Authors: Sammy De Grave, Tinyam Chan, Ka Hou Chu, Chienhui Yang, Jose Maria LandeiraAbstract:We present evidence that the single representative of the crustacean order Amphionidacea is a decapod shrimp and not a distinct order. After reviewing available morphological evidence, it is concluded that Amphionides is a larval form, but with an as yet unknown parentage. Although the most likely adult form is in the family Pandalidae, the limited molecular data available cannot fully resolve its affinity. We therefore propose to treat Amphionides reynaudii as incertae sedis within Caridea, rather than a separate family. In view of the large scale, tropical and subtropical distribution of the taxon, the possibility is discussed that Amphionides is more likely to be a composite taxon at generic level, rather than larvae of a single shrimp species.
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unweaving hippolytoid systematics crustacea decapoda hippolytidae resurrection of several families
Zoologica Scripta, 2014Co-Authors: Sammy De Grave, Ling Ming Tsang, Ka Hou Chu, Tinyam ChanAbstract:The Hippolytidae is the fourth largest family within the Caridea, currently containing over 330 described species in 37 genera, and the classification of this family has been rather controversial. In this study, sequences of two nuclear protein-coding genes, enolase and sodium-potassium ATPase α-subunit, and the mitochondrial 16S rRNA gene (totalling 1405 bp) from 29 hippolytid species in 20 genera plus 17 species from eight other Caridean families were used to examine the phylogenetic status of Hippolytidae sensu lato. Our results clearly reject the monophyly of Hippolytidae and support the recognition of the Lysmatidae Dana, 1852, Thoridae Kingsley, 1879, Bythocarididae Christoffersen 1987 and Merguiidae Christoffersen 1990.
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molecular phylogeny of the superfamily palaemonoidea crustacea decapoda Caridea based on mitochondrial and nuclear dna reveals discrepancies with the current classification
Invertebrate Systematics, 2013Co-Authors: Qi Kou, Tinyam Chan, Ka Hou Chu, Zhibin GanAbstract:Palaemonoidea is one of the most speciose superfamilies of Caridea. Since it was established, several classification schemes of Palaemonoidea have been proposed and modified. However, the current classification of Palaemonoidea is still in dispute. In this study, one mitochondrial gene (16S rRNA) and three nuclear genes (histone 3, 18S rRNA and 28S rRNA) were used to explore the phylogenetic relationships among the subgroups of the superfamily Palaemonoidea, including seven families with 25 affiliated genera. Based on the combined data with both maximum likelihood and Bayesian inference analyses, the results support the monophyly of Anchistioididae and Hymenoceridae. In contrast, Gnathophyllidae is suggested to be paraphyletic and Palaemonidae is shown to be a polyphyletic group. Our analyses reveal that the subfamily Palaemoninae could be approximately divided into three clades, and the branchiostegal groove is the probable morphological evidence of the environmental transition from sea to fresh water. Besides, for some of the Palaemonoidea families, their taxonomic status is obscure. A revision of Palaemonoidea and a re-evaluation of its constituent taxa appear to be necessary even though the systematic status of the subfamily Pontoniinae is still undetermined.
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phylogenetic analysis using rdna reveals polyphyly of oplophoridae decapoda Caridea
Invertebrate Systematics, 2010Co-Authors: Tinyam Chan, Ho Chee Lei, Ka Hou ChuAbstract:Molecular phylogenetic analysis on nine of the ten genera in the Caridean family Oplophoridae Dana, 1852, as well as 14 other Caridean families using mitochondrial 16S and nuclear 18S rRNA genes, does not support the monophyletic status of Oplophoridae. Two disparate groups of oplophorids are revealed, with different morphological characters and ecology. It is proposed that the family Oplophoridae is restricted to the three genera Oplophorus, Systellaspis and Janicella. These three genera tend to be distributed in shallower water than the other oplophorid genera, and can also be distinguished from them by certain morphological characters. They have a thicker integument, superficial cuticular photophores and larger eyes, and the molar process of their mandibles is greatly reduced or bears a deep channel. The family Acanthephyridae Bate, 1888 is resurrected for the other seven genera, which are generally distributed in deeper water and are characterised by red soft integument, no cuticular photophores, smaller eyes and well-developed molar process of the mandibles without a deep channel. The relationships between these two families and other Caridean families could not be clearly resolved in this study.
Raymond T. Bauer - One of the best experts on this subject based on the ideXlab platform.
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same sexual system but variable sociobiology evolution of protandric simultaneous hermaphroditism in lysmata shrimps
Integrative and Comparative Biology, 2006Co-Authors: Raymond T. BauerAbstract:Synopsis The sexual system of the decapod (Caridean) shrimp Lysmata is protandric simultaneous hermaphroditism (PSH). Individuals first mature as males (male phase ¼ MP) and then when older (larger) change to the external phenotype of female Carideans (female phase ¼ FP). However, unlike purely protandric Carideans, Lysmata FPs retain reduced male gonadal tissues and ducts, and are able to mate nonreciprocally as males as well as to reproduce as females. Thus, FPs of Lysmata species are functional simultaneous hermaphrodites although most reproductive effort is devoted to embryo production and incubation. The question explored here is, given the propensity of Carideans to protandry, the apparent low cost, and high reproductive advantage of PSH, why has not PSH evolved more frequently? The mating systems and sexual selection of Caridean shrimps, the original sex of protandric individuals, the cost of maleness, and sex allocation theory are discussed in relation to protandry and PSH. None of these factors adequately explains the evolution of PSH of Lysmata species. Lysmata has at least 2 species groups with very different sociobiologies; these groups do not appear to share current selective pressures that would explain PSH in both. A historical contingency hypothesis, testable in part with a phylogenetic analysis, may explain the evolution of PSH in Lysmata.
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protandric simultaneous hermaphroditism in the marine shrimp lysmata californica Caridea hippolytidae
Journal of Crustacean Biology, 2004Co-Authors: Raymond T. Bauer, William A NewmanAbstract:Abstract To investigate the extent of protandric simultaneous hermaphroditism (PSH) in the genus Lysmata, observations were made on the sexual system of L. californica, a species from the warm-temperate eastern Pacific. Observations on a large number of female-phase individuals (FPs) from a museum collection indicated that FPs with broods containing advanced embryos spawn again (successively) soon after brood hatching. Female-phase individuals maintained in pairs went through successive cycles of embryo brooding concomitant with gonadal vitellogenesis, hatching, molting, and spawning. Time-lapse video observations confirmed that FPs are able to copulate as males and inseminate postmolt, prespawning FPs. Prespawning FPs maintained alone did not produce successful broods of embryos. Thus, FPs of L. californica are outcrossing simultaneous hermaphrodites. Size-frequency distributions of sexual phases showed that individuals develop first in the male phase (MP) and then change to the female phase. Individuals...
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simultaneous hermaphroditism in Caridean shrimps a unique and puzzling sexual system in the decapoda
Journal of Crustacean Biology, 2000Co-Authors: Raymond T. BauerAbstract:The sexual system of the Caridean genus Lysmata has been described until recently as protandric hermaphroditism, in which individuals change sex from male to female with increasing size. However, recent studies by Bauer and Holt (1998) and Fiedler (1998) have shown that female-phase individuals of at least two species are outcrossing simultaneous hermaphrodites, a sexual system described here as protandric simultaneous hermaphroditism (PSH). There is considerable variation in the ontogeny of protandric Carideans, revealing an underlying flexibility in sex determination and development which has made PSH possible in at least some Lysmata spp. Possible costs and benefits of retention of male reproductive function in female-phase hermaphrodites are proposed. The PSH appears to be unique (to date) within the Decapoda and other Malacostraca to the Caridean genus Lysmata and perhaps the related genus Exhippolysmata. It is puzzling that PSH has evolved in a group with such considerable variation in socio-ecological attributes: some Lysmata species are warm temperate, highly aggregated, with unspecialized (facultative) fish-cleaning behavior while others are tropical species, occur at low density in hermaphrodite pairs associated with sea anemones, and are specialized fish cleaners. Description of sexual systems, costs/benefits of PSH, and socioecological attributes of Lysmata, considered in the context of a phylogeny of the group, will be necessary to understand how PSH evolved in Lysmata and why it has not evolved in other groups of protandric Carideans.
Zhibin Gan - One of the best experts on this subject based on the ideXlab platform.
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four new records of Caridean shrimp crustacea decapoda Caridea from the east china sea and south china sea
Acta Oceanologica Sinica, 2018Co-Authors: Zhibin GanAbstract:Four species of Caridean shrimps collected from the East China Sea and South China Sea represent new records for the Chinese waters: Lysmata kempi Chace, 1997; Lysmata lipkei Okuno and Fiedler, 2010; Chlorocurtis jactans (Nobili, 1904) and Rhynchocinetes conspiciocellus Okuno and Takeda, 1992. The diagnostic characters and illustrations of these four species are presented, with remarks on their taxonomy. The identification keys of these species from Chinese waters are provided.
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molecular phylogeny of the superfamily palaemonoidea crustacea decapoda Caridea based on mitochondrial and nuclear dna reveals discrepancies with the current classification
Invertebrate Systematics, 2013Co-Authors: Qi Kou, Tinyam Chan, Ka Hou Chu, Zhibin GanAbstract:Palaemonoidea is one of the most speciose superfamilies of Caridea. Since it was established, several classification schemes of Palaemonoidea have been proposed and modified. However, the current classification of Palaemonoidea is still in dispute. In this study, one mitochondrial gene (16S rRNA) and three nuclear genes (histone 3, 18S rRNA and 28S rRNA) were used to explore the phylogenetic relationships among the subgroups of the superfamily Palaemonoidea, including seven families with 25 affiliated genera. Based on the combined data with both maximum likelihood and Bayesian inference analyses, the results support the monophyly of Anchistioididae and Hymenoceridae. In contrast, Gnathophyllidae is suggested to be paraphyletic and Palaemonidae is shown to be a polyphyletic group. Our analyses reveal that the subfamily Palaemoninae could be approximately divided into three clades, and the branchiostegal groove is the probable morphological evidence of the environmental transition from sea to fresh water. Besides, for some of the Palaemonoidea families, their taxonomic status is obscure. A revision of Palaemonoidea and a re-evaluation of its constituent taxa appear to be necessary even though the systematic status of the subfamily Pontoniinae is still undetermined.