Lista de obras - Paul F. Clark - Dominio Público Uruguay

A New Genus and Species of Axiid (Decapoda, Thalassinidea) From the Levantine Basin of the Mediterranean

artículo científico publicado en 1993

A checklist of Crustacea Decapoda collected from Conic Island Cave and adjacent areas of Hong Kong

artículo científico publicado en 2008

A new genus for the freshwater crab Potamonemus asylos Cumberlidge, 1993, (Brachyura: Potamoidea: Potamonautidae) from Cameroon, Central Africa, with a key to the genera of the Potamonautinae

scholarly article by Neil Cumberlidge et al published 27 March 2019 in Journal of Natural History

A new multilocus phylogeny reveals overlooked diversity in African freshwater crabs (Brachyura: Potamoidea): a major revision with new higher taxa and genera ⬇️

artículo científico publicado en 2022

A new species of Calaxius Sakai & de Saint Laurent, 1989, from West Africa (Crustacea: Decapoda: Axiidae) and synonymy of Manaxius Kensley, 2003

scholarly article in Proceedings of the Biological Society of Washington, vol. 120 no. 1, April 2007

A new species of Etisus (Crustacea, Brachyura, Xanthidae) from New Caledonia ⬇️

scholarly article published in 1995

A new species of Munidopsis from a seamount of the Southwest Indian Ocean Ridge (Decapoda: Munidopsidae) ⬇️

artículo científico publicado en 2014

A new species of Notonyx A. Milne-Edwards, 1873 (Crustacea, Brachyura, Goneplacidae) from the intertidal zone of Phuket, Thailand ⬇️

artículo científico publicado en 2006

A revision of the genus Matuta Weber, 1795 (Crustacea: Brachyura: Calappidae) ⬇️

scientific article published in 1994

A revision ofLatopilumnusTürkay & Schuhmacher, 1985, andAniptumnusNg, 2002 (Crustacea: Decapoda: Brachyura: Pilumnidae) with larval comparisons

artículo científico publicado en 2008

Additional notes on the publication of the Narrative, Zoology and Notes from a Journal of Research into the Natural History of the Voyage of H.M.S. Samarang and its consequences for the nomenclature of decapod crustaceans and other taxa

scientific article published on 07 July 2020

Alain Crosnier’s role in modern carcinology: exploration, international collaboration, and taxonomy ⬇️

artículo científico publicado en 2021

Albertine Rift Valley endemics: three new species of freshwater crabs (Brachyura: Potamoidea: Potamonautidae) from Uganda, the Democratic Republic of the Congo, and Rwanda

scholarly article by Neil Cumberlidge & Paul F. Clark published 5 July 2018 in Journal of Natural History

Alien species in British brackish and marine waters

article

An updated checklist and key to the Zambian species of freshwater crabs, with the description of a new species of Potamonautes MacLeay, 1838 (Brachyura: Potamoidea: Potamonautidae) ⬇️

scientific article published in 2019

Catching invasive Chinese mitten crabs while releasing the endangered European eel and other fish by-catch: The implications of fyke net design

artículo científico publicado en 2017

Ceratoplax margarita n. sp., a new rhizopine crab (Crustacea: Brachyura: Pilumnidae) from Papua New Guinea, with rediagnoses ofC. truncatifronsRathbun, 1914, andC. fulgidaRathbun, 1914

artículo científico publicado en 2015

DNA barcoding the phyllosoma of Scyllarides squammosus (H. Milne Edwards, 1837) (Decapoda: Achelata: Scyllaridae)

artículo científico publicado en 2016

Description of a new genus and two new species of freshwater crabs (Decapoda: Brachyura: Potamonautidae) from southeastern Madagascar ⬇️

artículo científico publicado en 2021

Description of three new species of Potamonautes MacLeay, 1838 from the Lake Victoria region in southern Uganda, East Africa (Brachyura: Potamoidea: Potamonautidae)

artículo científico publicado en 2017

Descriptions of three new Pseudolitochira Ward, 1942 species (Crustacea: Brachyura: Pilumnidae) from the West Pacific ⬇️

artículo científico publicado en 2022

Discovery of two new populations of the rare endemic freshwater crab Louisea yabassi Mvogo Ndongo, von Rintelen & Cumberlidge, 2019 (Brachyura: Potamonautidae) from the Ebo Forest near Yabassi in Cameroon, Central Africa, with recommendations for… ⬇️

artículo científico publicado en 2021

Disentangling the Sudanonautes granulatus (Balss, 1929) species complex (Potamoidea: Potamonautidae), with the description of two new freshwater crabs from Nigeria and Côte d’Ivoire, West Africa

artículo científico publicado en 2021

Distinguishing ten sympatric species of fiddler crab (Decapoda: Ocypodidae) using a suite of phenotypic characteristics

artículo científico publicado en 2021

Erratum: SEYIT A. KAMANLI, DAVID MORRITT, ALEXANDER D. BALL, TOMASZ GORAL PAUL F. CLARK (2018) Re-description of Chinese mitten crab Eriocheir sinensis H. Milne Edwards, 1853 (Crustacea: Brachyura: Grapsoidea: Varunidae) zoeal development using conf

artículo científico publicado en 2018

Establishment of a new subfamily forShenius anomalus(Shen, 1935) (Crustacea: Decapoda: Brachyura: Dotillidae)

scientific article published in 2010

Evidence for the invasion and successful establishment of Hemigrapsus takanoi Asakura & Watanabe, 2005 (Decapoda, Varunidae) in Great Britain

First Mediterranean record of Actaea savignii (H. Milne Edwards, 1834) (Crustacea: Decapoda: Brachyura: Xanthidae), an additional Erythraean alien crab

First Stage Zoeas of Quadrella Dana, 1851 [Crustacea: Decapoda: Brachyura: Xanthoidea: Trapeziidae] and their Affinities with those of Tetralia Dana, 1851, and Trapezia Latreille, 1828

Flexible prey handling, preference and a novel capture technique in invasive, sub-adult Chinese mitten crabs

article by Christopher D. Mills et al published 7 March 2016 in Hydrobiologia

High prevalence of plastic ingestion by Eriocheir sinensis and Carcinus maenas (Crustacea: Decapoda: Brachyura) in the Thames Estuary

artículo científico publicado en 2020

Horizon scanning for invasive alien species with the potential to threaten biodiversity in Great Britain ⬇️

artículo científico publicado en 2014

Ingestion of plastic by fish: A comparison of Thames Estuary and Firth of Clyde populations

artículo científico publicado en 2018

Invasive records of Eriocheir hepuensis Dai, 1991 (Crustacea: Brachyura: Grapsoidea: Varunidae): Implications and taxonomic considerations

scientific article published in 2012

Laboratory based feeding behaviour of the Chinese mitten crab, Eriocheir sinensis (Crustacea: Decapoda: Brachyura: Varunidae): fish egg consumption (De Haan, 1835)

article

Lobithelphusa mexicana Rodriguez, 1982 (Decapoda: Pseudothelphusidae): a reassessment of key characters and systematics

artículo científico publicado en 2019

London's river of plastic: High levels of microplastics in the Thames water column

scientific article published on 08 June 2020

Monitoring downstream migrations of Eriocheir sinensis H. Milne Edwards, 1853 (Crustacea: Brachyura: Grapsoidea: Varunidae) in the River Thames using capture data from a water abstraction intake

artículo científico publicado en 2013

On a collection ofAcropora-inhabiting trapeziids (Crustacea Brachyura Xanthoidea) from East Africa

artículo científico publicado en 1988

On two reports associated with James Wood-Mason and Alfred William Alcock published by the Indian Museum and the Indian Marine Survey between 1890 and 1891: implications for malacostracan nomenclature

artículo científico publicado en 2014

Paragonimus and paragonimiasis in West and Central Africa: unresolved questions

scientific article published on 13 September 2018

Pathogens co-transported with invasive non-native aquatic species: implications for risk analysis and legislation

artículo científico publicado en 2021

Pathogens co-transported with invasive non-native aquatic species: implications for risk analysis and legislation

scientific article published in 2021

Plastic in the Thames: a river runs through it.

artículo científico publicado en 2013

Possible amphi-Atlantic dispersal of Scyllarus lobsters (Crustacea: Scyllaridae): molecular and larval evidence

artículo científico publicado en 2017

Presence of a second Eriocheir species in Europe as confirmed by molecular and morphological data

artículo científico publicado en 2022

Pseudolitochira integra (Miers, 1884) (Crustacea: Brachyura: Pilumnidae): redescribed and illustrated from micro-ct scanning the type female

artículo científico publicado en 2021

Re-description of Chinese mitten crab Eriocheir sinensis H. Milne Edwards, 1853 (Crustacea: Brachyura: Grapsoidea: Varunidae) zoeal development using confocal laser scanning microscopy

article

Redescription of Vellumnus penicillatus (Gordon, 1930) from Hong Kong and description of a new species from Macclesfield Bank, South China Sea (Crustacea: Brachyura: Pilumnidae)

artículo científico publicado en 2023

Reports of American lobsters, Homarus americanus (H. Milne Edwards, 1837), in British waters

scientific article published in 2012

Scyllarus arctus (Crustacea: Decapoda: Scyllaridae) final stage phyllosoma identified by DNA analysis, with morphological description

scholarly article in Journal of the Marine Biological Association of the United Kingdom, vol. 91 no. 2, April 2010

Steep Holm Island, Bristol Channel, UK: evidence of Larus fuscus Linnaeus, 1758 (lesser black-backed gull) feeding on the invasive signal crayfish, Pacifastacus leniusculus Dana, 1852

artículo científico publicado en 2012

Synthetic and Semi-Synthetic Microplastic Ingestion by Mesopelagic Fishes From Tristan da Cunha and St Helena, South Atlantic

artículo científico publicado en 2021

The Crustacea taxa established in Volume 35, Bollettino della Società dei Naturalisti in Napoli: Authority date 1923 or 1924?

artículo científico publicado en 2023

The Indo-Pacific Pilumnidae XII. On the familial placement of Chlorodiella bidentata (Nobili, 1901) and Tanaocheles stenochilus Kropp, 1984 using adult and larval characters with the establishment of a new subfamily, Tanaochelinae (Crustacea:…

article published in 2000

The Indo-West Pacific Pilumnidae XVIII: On the taxonomy of Pilumnus scabriusculus Adams and White, 1849, and P. sluiteri De Man, 1892, with a note on Cancer incanus Forskål, 1775 (Brachyura: Xanthoidea)

artículo científico publicado en 2005

The barnacle Amphibalanus improvisus (Darwin, 1854), and the mitten crab Eriocheir: one invasive species getting off on another!

article

The first stage zoea of Pseudoliomera speciosa (Dana, 1852) (Crustacea, Decapoda, Brachyura, Xanthidae) ⬇️

artículo científico publicado en 1998

The first zoeal stage morphology of Crossotonotus spinipes (De Man, 1888) and Pseudopalicus serripes (Alcock & Anderson, 1895), with implications for palicoid systematics (Crustacea: Brachyura: Palicoidea) ⬇️

scientific article published in 2012

The freshwater crabs of Ethiopia, northeastern Africa, with the description of a new Potamonautes cave species (Brachyura: Potamonautidae)

artículo científico publicado en 2012

The identity of Chlorodius miliaris A. Milne Edwards, 1873, and the establishment of a new genus of Chlorodiinae (Crustacea, Decapoda, Brachyura, Xanthoidea, Xanthidae) from New Caledonia ⬇️

artículo científico publicado en 1999

The larval development of the poisonous mosaic crab, Lophozozymus pictor (Fabricius, 1798) (Crustacea, Decapoda, Brachyura, Xanthidae, Zosiminae), with comments on familial characters for first stage zoeas ⬇️

artículo científico publicado en 1998

The lecithotrophic zoea of Chirostylus ortmanni Miyake & Baba, 1968 (Crustacea: Anomura: Galatheoidea: Chirostylidae) described from laboratory hatched material ⬇️

artículo científico publicado en 2008

The significance of female dimorphic characters of primary freshwater crabs for the systematics of Eubrachyura (Crustacea: Decapoda: Brachyura)

scientific article published in 2021

The true identities of the slipper lobsters Nisto laevis and Nisto asper (Crustacea: Decapoda: Scyllaridae) verified by DNA analysis

article by Ferran Palero et al published 2009 in Invertebrate Systematics

The type of the land crab Cardisoma hirtipes Dana, 1851 (Crustacea: Brachyura: Gecarcinidae)

artículo científico publicado en 2014

The ‘giant phyllosoma’ are larval stages of Parribacus antarcticus (Decapoda : Scyllaridae)

Three new genera of Indo-West Pacific Xanthidae (Crustacea, Decapoda, Brachyura, Xanthoidea) ⬇️

artículo científico publicado en 2003

Two new species of freshwater crabs from Mount Elgon, East Africa (Brachyura: Potamoidea: Potamonautidae) and a re-diagnosis of Potamonautes niloticus (H. Milne Edwards, 1837) with notes on their natural history and onchocerciasis

artículo científico publicado en 2010

Two new species of freshwater crabs from the highlands of northern Uganda, East Africa and a redescription of Potamonautes amalerensis (Rathbun, 1935) stat. rev. from Mount Kadam (Brachyura: Potamoidea: Potamonautidae)

artículo científico publicado en 2016

Unravelling the Potamonautes lirrangensis (Rathbun, 1904) species complex (Potamoidea: Potamonautidae), with the description of two new species ⬇️

artículo científico

Phylogenetic relationships among the species of the Cameroonian endemic freshwater crab genus Louisea Cumberlidge, 1994 (Crustacea, Brachyura, Potamonautidae), with notes on intraspecific morphological variation within two threatened species

artículo científico publicado en 2022

Lista de obras de Paul F. Clark

A New Genus and Species of Axiid (Decapoda, Thalassinidea) From the Levantine Basin of the Mediterranean

A checklist of Crustacea Decapoda collected from Conic Island Cave and adjacent areas of Hong Kong

A new genus for the freshwater crab Potamonemus asylos Cumberlidge, 1993, (Brachyura: Potamoidea: Potamonautidae) from Cameroon, Central Africa, with a key to the genera of the Potamonautinae

A new multilocus phylogeny reveals overlooked diversity in African freshwater crabs (Brachyura: Potamoidea): a major revision with new higher taxa and genera ⬇️

A new species of Calaxius Sakai & de Saint Laurent, 1989, from West Africa (Crustacea: Decapoda: Axiidae) and synonymy of Manaxius Kensley, 2003

A new species of Etisus (Crustacea, Brachyura, Xanthidae) from New Caledonia ⬇️

A new species of Munidopsis from a seamount of the Southwest Indian Ocean Ridge (Decapoda: Munidopsidae) ⬇️

A new species of Notonyx A. Milne-Edwards, 1873 (Crustacea, Brachyura, Goneplacidae) from the intertidal zone of Phuket, Thailand ⬇️

A revision of the genus Matuta Weber, 1795 (Crustacea: Brachyura: Calappidae) ⬇️

A revision ofLatopilumnusTürkay & Schuhmacher, 1985, andAniptumnusNg, 2002 (Crustacea: Decapoda: Brachyura: Pilumnidae) with larval comparisons

Additional notes on the publication of the Narrative, Zoology and Notes from a Journal of Research into the Natural History of the Voyage of H.M.S. Samarang and its consequences for the nomenclature of decapod crustaceans and other taxa

Alain Crosnier’s role in modern carcinology: exploration, international collaboration, and taxonomy ⬇️

Albertine Rift Valley endemics: three new species of freshwater crabs (Brachyura: Potamoidea: Potamonautidae) from Uganda, the Democratic Republic of the Congo, and Rwanda

Alien species in British brackish and marine waters

An updated checklist and key to the Zambian species of freshwater crabs, with the description of a new species of Potamonautes MacLeay, 1838 (Brachyura: Potamoidea: Potamonautidae) ⬇️

Catching invasive Chinese mitten crabs while releasing the endangered European eel and other fish by-catch: The implications of fyke net design

Ceratoplax margarita n. sp., a new rhizopine crab (Crustacea: Brachyura: Pilumnidae) from Papua New Guinea, with rediagnoses ofC. truncatifronsRathbun, 1914, andC. fulgidaRathbun, 1914

DNA barcoding the phyllosoma of Scyllarides squammosus (H. Milne Edwards, 1837) (Decapoda: Achelata: Scyllaridae)

Description of a new genus and two new species of freshwater crabs (Decapoda: Brachyura: Potamonautidae) from southeastern Madagascar ⬇️

Description of three new species of Potamonautes MacLeay, 1838 from the Lake Victoria region in southern Uganda, East Africa (Brachyura: Potamoidea: Potamonautidae)

Descriptions of three new Pseudolitochira Ward, 1942 species (Crustacea: Brachyura: Pilumnidae) from the West Pacific ⬇️

Discovery of two new populations of the rare endemic freshwater crab Louisea yabassi Mvogo Ndongo, von Rintelen & Cumberlidge, 2019 (Brachyura: Potamonautidae) from the Ebo Forest near Yabassi in Cameroon, Central Africa, with recommendations for… ⬇️

Disentangling the Sudanonautes granulatus (Balss, 1929) species complex (Potamoidea: Potamonautidae), with the description of two new freshwater crabs from Nigeria and Côte d’Ivoire, West Africa

Distinguishing ten sympatric species of fiddler crab (Decapoda: Ocypodidae) using a suite of phenotypic characteristics

Erratum: SEYIT A. KAMANLI, DAVID MORRITT, ALEXANDER D. BALL, TOMASZ GORAL PAUL F. CLARK (2018) Re-description of Chinese mitten crab Eriocheir sinensis H. Milne Edwards, 1853 (Crustacea: Brachyura: Grapsoidea: Varunidae) zoeal development using conf

Establishment of a new subfamily forShenius anomalus(Shen, 1935) (Crustacea: Decapoda: Brachyura: Dotillidae)

Evidence for the invasion and successful establishment of Hemigrapsus takanoi Asakura & Watanabe, 2005 (Decapoda, Varunidae) in Great Britain

First Mediterranean record of Actaea savignii (H. Milne Edwards, 1834) (Crustacea: Decapoda: Brachyura: Xanthidae), an additional Erythraean alien crab

First Stage Zoeas of Quadrella Dana, 1851 [Crustacea: Decapoda: Brachyura: Xanthoidea: Trapeziidae] and their Affinities with those of Tetralia Dana, 1851, and Trapezia Latreille, 1828

Flexible prey handling, preference and a novel capture technique in invasive, sub-adult Chinese mitten crabs

High prevalence of plastic ingestion by Eriocheir sinensis and Carcinus maenas (Crustacea: Decapoda: Brachyura) in the Thames Estuary

Horizon scanning for invasive alien species with the potential to threaten biodiversity in Great Britain ⬇️

Ingestion of plastic by fish: A comparison of Thames Estuary and Firth of Clyde populations

Invasive records of Eriocheir hepuensis Dai, 1991 (Crustacea: Brachyura: Grapsoidea: Varunidae): Implications and taxonomic considerations

Laboratory based feeding behaviour of the Chinese mitten crab, Eriocheir sinensis (Crustacea: Decapoda: Brachyura: Varunidae): fish egg consumption (De Haan, 1835)

Lobithelphusa mexicana Rodriguez, 1982 (Decapoda: Pseudothelphusidae): a reassessment of key characters and systematics

London's river of plastic: High levels of microplastics in the Thames water column

Monitoring downstream migrations of Eriocheir sinensis H. Milne Edwards, 1853 (Crustacea: Brachyura: Grapsoidea: Varunidae) in the River Thames using capture data from a water abstraction intake

On a collection ofAcropora-inhabiting trapeziids (Crustacea Brachyura Xanthoidea) from East Africa

On two reports associated with James Wood-Mason and Alfred William Alcock published by the Indian Museum and the Indian Marine Survey between 1890 and 1891: implications for malacostracan nomenclature

Paragonimus and paragonimiasis in West and Central Africa: unresolved questions

Pathogens co-transported with invasive non-native aquatic species: implications for risk analysis and legislation

Pathogens co-transported with invasive non-native aquatic species: implications for risk analysis and legislation

Plastic in the Thames: a river runs through it.

Possible amphi-Atlantic dispersal of Scyllarus lobsters (Crustacea: Scyllaridae): molecular and larval evidence

Presence of a second Eriocheir species in Europe as confirmed by molecular and morphological data

Pseudolitochira integra (Miers, 1884) (Crustacea: Brachyura: Pilumnidae): redescribed and illustrated from micro-ct scanning the type female

Re-description of Chinese mitten crab Eriocheir sinensis H. Milne Edwards, 1853 (Crustacea: Brachyura: Grapsoidea: Varunidae) zoeal development using confocal laser scanning microscopy

Redescription of Vellumnus penicillatus (Gordon, 1930) from Hong Kong and description of a new species from Macclesfield Bank, South China Sea (Crustacea: Brachyura: Pilumnidae)

Reports of American lobsters, Homarus americanus (H. Milne Edwards, 1837), in British waters

Scyllarus arctus (Crustacea: Decapoda: Scyllaridae) final stage phyllosoma identified by DNA analysis, with morphological description

Steep Holm Island, Bristol Channel, UK: evidence of Larus fuscus Linnaeus, 1758 (lesser black-backed gull) feeding on the invasive signal crayfish, Pacifastacus leniusculus Dana, 1852

Synthetic and Semi-Synthetic Microplastic Ingestion by Mesopelagic Fishes From Tristan da Cunha and St Helena, South Atlantic

The Crustacea taxa established in Volume 35, Bollettino della Società dei Naturalisti in Napoli: Authority date 1923 or 1924?

The Indo-Pacific Pilumnidae XII. On the familial placement of Chlorodiella bidentata (Nobili, 1901) and Tanaocheles stenochilus Kropp, 1984 using adult and larval characters with the establishment of a new subfamily, Tanaochelinae (Crustacea:…

The Indo-West Pacific Pilumnidae XVIII: On the taxonomy of Pilumnus scabriusculus Adams and White, 1849, and P. sluiteri De Man, 1892, with a note on Cancer incanus Forskål, 1775 (Brachyura: Xanthoidea)

The barnacle Amphibalanus improvisus (Darwin, 1854), and the mitten crab Eriocheir: one invasive species getting off on another!

The first stage zoea of Pseudoliomera speciosa (Dana, 1852) (Crustacea, Decapoda, Brachyura, Xanthidae) ⬇️

The first zoeal stage morphology of Crossotonotus spinipes (De Man, 1888) and Pseudopalicus serripes (Alcock & Anderson, 1895), with implications for palicoid systematics (Crustacea: Brachyura: Palicoidea) ⬇️

The freshwater crabs of Ethiopia, northeastern Africa, with the description of a new Potamonautes cave species (Brachyura: Potamonautidae)

The identity of Chlorodius miliaris A. Milne Edwards, 1873, and the establishment of a new genus of Chlorodiinae (Crustacea, Decapoda, Brachyura, Xanthoidea, Xanthidae) from New Caledonia ⬇️

The larval development of the poisonous mosaic crab, Lophozozymus pictor (Fabricius, 1798) (Crustacea, Decapoda, Brachyura, Xanthidae, Zosiminae), with comments on familial characters for first stage zoeas ⬇️

The lecithotrophic zoea of Chirostylus ortmanni Miyake & Baba, 1968 (Crustacea: Anomura: Galatheoidea: Chirostylidae) described from laboratory hatched material ⬇️

The significance of female dimorphic characters of primary freshwater crabs for the systematics of Eubrachyura (Crustacea: Decapoda: Brachyura)

The true identities of the slipper lobsters Nisto laevis and Nisto asper (Crustacea: Decapoda: Scyllaridae) verified by DNA analysis

The type of the land crab Cardisoma hirtipes Dana, 1851 (Crustacea: Brachyura: Gecarcinidae)

The ‘giant phyllosoma’ are larval stages of Parribacus antarcticus (Decapoda : Scyllaridae)

Three new genera of Indo-West Pacific Xanthidae (Crustacea, Decapoda, Brachyura, Xanthoidea) ⬇️

Two new species of freshwater crabs from Mount Elgon, East Africa (Brachyura: Potamoidea: Potamonautidae) and a re-diagnosis of Potamonautes niloticus (H. Milne Edwards, 1837) with notes on their natural history and onchocerciasis

Two new species of freshwater crabs from the highlands of northern Uganda, East Africa and a redescription of Potamonautes amalerensis (Rathbun, 1935) stat. rev. from Mount Kadam (Brachyura: Potamoidea: Potamonautidae)

Unravelling the Potamonautes lirrangensis (Rathbun, 1904) species complex (Potamoidea: Potamonautidae), with the description of two new species ⬇️

﻿Phylogenetic relationships among the species of the Cameroonian endemic freshwater crab genus Louisea Cumberlidge, 1994 (Crustacea, Brachyura, Potamonautidae), with notes on intraspecific morphological variation within two threatened species

Phylogenetic relationships among the species of the Cameroonian endemic freshwater crab genus Louisea Cumberlidge, 1994 (Crustacea, Brachyura, Potamonautidae), with notes on intraspecific morphological variation within two threatened species