Rafael Lemaitre's research while affiliated with Smithsonian Institution and other places

Publications (116)

Article
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The French carcinologist and oceanographer Alain Crosnier (1930–2021) had a most influential role in modern carcinology. This tribute reviews his contributions to organising oceanographic expeditions; expanding collections of specimens, particularly from the deep sea; and supporting international collaboration for taxonomic investigations of the ri...
Article
Recent sampling on mesophotic deep banks in the northwestern Gulf of Mexico has produced a previously undescribed hermit crab assignable to the genus Cancellus H. Milne Edwards, 1836. Members of the genus are most often found to occupy cavities of eroded coral, siliceous sponges, porous calcareous rock fragments, algal concretions, or worm tubes as...
Article
Six species of hermit crabs of the family Paguridae from the Caribbean Sea and Gulf of Mexico region, including two new species, Anisopagurus asteriscus sp. nov. and Pagurus alarius sp. nov., are documented. The two new species are described, and recognition characters summarized for the four previously known species. Reports of the latter, Nematop...
Article
Coloration, gene-sequence data (H3, 12s, 16s), and subtle features in morphology support the description of two new species, both formerly regarded to represent accepted variants of Phimochirus holthuisi s.l. While color in life consistently separates these species from P. holthuisi s.s. and from each other, morphological distinctions are subtle an...
Preprint
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Research Infrastructures (RIs) are facilities, resources and services used by the scientific community to conduct research and foster innovation. LifeWatch ERIC has developed various virtual research environments, which include many virtual laboratories (vLabs) offering high computational capacity and comprehensive collaborative platforms that supp...
Preprint
Full-text available
Research Infrastructures (RIs) are facilities, resources and services used by the scientific community to conduct research and foster innovation. LifeWatch ERIC has developed various virtual research environments, which include many virtual laboratories (vLabs) offering high computational capacity and comprehensive collaborative platforms that supp...
Article
The porcelain crab Porcellana africana Chace, 1956, a species native to NW Africa, between Western Sahara and Senegal, is reported from Saldanha Bay, South Africa, and both morphological evidence and DNA analysis are used to confirm its identity. The taxonomic history of P. africana is summarized, and the taxonomic implications of the DNA analysis...
Article
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For 130 years the diogenid genus Paguropsis Henderson, 1888 was considered monotypic for an unusual species, P.typica Henderson, 1888, described from the Philippines and seldom reported since. Although scantly studied, this species is known to live in striking symbiosis with a colonial sea anemone that the hermit can stretch back and forth like a b...
Preprint
Full-text available
Research Infrastructures (RIs) are facilities, resources and services used by the scientific community to conduct research and foster innovation. LifeWatch ERIC has developed various virtual research environments, which include many virtual laboratories (vLabs) offering high computational capacity and comprehensive collaborative platforms that supp...
Article
This study, the third of a multi-part series on male sexual tubes in hermit crabs, the external morphology of the tube of the western Atlantic Catapagurus sharreri A. Milne-Edwards, 1880 is documented using scanning electron microscopy. The male of this species has an unpaired right sexual tube that is long (more than five coxal lengths), and curve...
Article
Goreopagurus poorei Lemaitre & McLaughlin, 2003, a hermit crab of the family Paguridae previously known only from off eastern Tasmania in the Tasman Sea, has been discovered in the western Indian Ocean off the coast of South Africa, extending considerably the range of this species by 10,100 km to the west. While this finding represents a large rang...
Article
A new species of symbiotic palaemonid shrimp, Periclimenaeus mcmichaeli sp. nov., is described based on a single male specimen collected near Dry Tortugas, Florida, in the southeastern Gulf of Mexico. This new species, the 14th now known for the genus Periclimenaeus Borradaile 1915 from the western Atlantic, is morphologically most similar to P. wi...
Article
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A new shallow-water species of the stenopodid shrimp genus Odontozona is described based on a specimen collected on a coral reef environment in the San Bernardo Islands, Caribbean coast of Colombia. Odontozona edyli n. sp. can be separated from all other congenerics by a combination of morphological characteristics, most notably the ornate abdomen...
Article
Six new monotypic genera and eight new species of hermit crabs of the family Paguridae Latreille, 1802 are fully described based on specimens obtained during two separate, intensive biodiversity studies on the islands of Guadeloupe, Curaçao, and Dominica in the Lesser Antilles, Caribbean Sea. The study in Guadeloupe utilized a broad variety of samp...
Article
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Deep-water hermit crabs of the family Parapaguridae can be abundant (up to 20 kg or 1000 hermit crab individuals per haul) in the trawl bycatch collected during South African demersal abundance research surveys. Until recently, only two parapagurid species had been recognized in the bycatch; Parapagurus bouvieri Stebbing, 1910, and Sympagurus dimor...
Article
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This original form of this rebuttal was submitted to Science on 3 March 2017 (limited to 300 words as per Science editorial policy) but rejected on 13 March 2017. Herein, we elaborate on our original Science submission in order to more fully address the issue without the length limitations. This rebuttal is followed by the list of the signatories w...
Article
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A new secretive, yet brightly colored hermit crab species of the family Paguridae, Pylopaguropsismollymulleraesp. n., is fully described based on specimens from the reefs of Bonaire, Lesser Antilles, southern Caribbean Sea. Populations of this new species were discovered and photographed in the Bonaire National Marine Park under a large coral ledge...
Data
Photograph of live specimen of Pylopaguropsis mollymullerae sp. n. in gastropod shell
Data
Photograph of live ovigerous female of Pylopaguropsis mollymullerae sp. n. stretching out from gastropod shell
Article
A new species of symbiotic palaemonid shrimp of the genus Pseudocoutierea Holthuis, 1951, is described based on a specimen collected in the eastern Gulf of Mexico, off the southwest coast of Florida. Pseudocoutierea stephanieae sp. nov., is the seventh known in this genus, and morphologically most similar to P. antillensis Chace, 1972, and P. conch...
Article
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A male specimen of a new species of the heterogeneous genus Pagurus Fabricius, 1775, collected in 1968 off the Caribbean coast of Venezuela, was discovered among the vast crustacean collections of the Smithsonian Institution. This new species herein described and illustrated is named P. scopaopsis, and is characterized primarily by the presence of:...
Article
A collection of Paguroidea recently obtained during deep-water expeditions along the coast of Brazil, forms the basis of this report. Of the 14 species reported from Brazil, 11 represent range extensions to the south, and one, Michelopagurus atlanticus (Bouvier, 1922), is a first record for the western Atlantic. The specimens were compared with typ...
Article
A new species of the family Paguridae Latreille, 1802, Michelopagurus tangaloa n. sp., is described from deep waters (485–1145 m) off the coast of Moorea, French Polynesia, South Pacific. This new species is the fifth known in the genus Michelopagurus McLaughlin, 1997, and the third from the Indo-West Pacific; the other two species are distributed...
Article
The taxonomic status of Paguristes praedator Glassell, 1937, and Paguristes oxyophthalmus Holthuis, 1959, is reevaluated, and the two species redescribed and illustrated in detail. Both species are transferred to the genus Areopaguristes Rahayu & McLaughlin, 2010, a genus previously defined to accommodate species of Paguristes sensu lato with 12 pa...
Article
Analysis of the barcode region of the COI gene has unmasked a cryptic hermit crab species confounded under the name Clibanarius vittatus (Bosc, 1802), long applied to a common littoral, striped-colored species presumed to range broadly in the western Atlantic from the southeastern United States and Gulf of Mexico to Brazil. Molecular and morphologi...
Article
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A new hermit crab species of the family Paguridae, Tomopaguropsis ahkinpechensis sp. n., is described from deep waters (780–827 m) of the Gulf of Mexico. This is the second species of Tomopaguropsis known from the western Atlantic, and the fifth worldwide. The new species is morphologically most similar to a species from Indonesia, Tomopaguropsis c...
Article
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The names Gebiidea and Axiidea, erected by de Saint Laurent (1979), have priority over others for the two infraorders of shrimps previously included in Thalassinidea. Importantly, Thalassinidea are not monophyletic and the name should be replaced. Gebiidea and Axiidea, besides having priority and describing two monophyletic taxa, are now in common...
Article
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Seventeen crab species of Homolodromiidae and Homolidae, in seven genera, are recognized in the Atlantic and Pacific coasts of the Americas. The genus Dicranodromia A. Milne-Edwards, 1880, is recorded for the first time from the eastern Pacific with a new species described from the Galapagos Islands. Nine species, five Homolodromiidae and four Homo...
Article
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A new species of squat lobster, Munidopsis shulerae sp. nov., from the Gulf of Mexico and western Caribbean, is fully described and illustrated. This new species is named in honor of the late Barbara Shuler Mayo (1945-1988), who first recognized this new taxon in her 1974 unpublished doctoral dissertation, but never formalized it. This new species...
Article
A collection of porcellanid crabs from Guadeloupe Island, Caribbean Sea Lesser Antilles, is reported. The specimens were obtained during the KARUBENTHOS Expedition (V.2012), a 1-month intensive survey of selected habitats in shallow-water to moderate depth (intertidal to 160 m). A total of 20 species were found, 15 of which represent new records fo...
Article
A worldwide taxonomic and distributional synthesis of the deep-water hermit crab genus Oncopagurus Lemaitre, 1996 is presented. This genus, originally defined for 10 species is set apart from other Parapaguridae as well as other Paguroidea, by one synapomorphy: the presence of an upwardly curved epistomial spine. This study is based on a large amou...
Article
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A specimen of the swimming crab Scylla serrata, a species native to the tropical Indo-West and South Pacific, is reported from Cartagena Bay, Colombia, in the southern Caribbean. It is the third alien decapod crustacean documented from the Caribbean coast of Colombia. Analyses of genetic sequences points to a northern Indian Ocean origin of this...
Article
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The infraorder Anomura has long captivated the attention of evolutionary biologists due to its impressive morphological diversity and ecological adaptations. To date, 2500 extant species have been described but phylogenetic relationships at high taxonomic levels remain unresolved. Here, we reconstruct the evolutionary history---phylogeny, divergenc...
Article
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Background: The question of how many marine species exist is important because it provides a metric for how much we do and do not know about life in the oceans. We have compiled the first register of the marine species of the world and used this baseline to estimate how many more species, partitioned among all major eukaryotic groups, may be disco...
Article
A new species of hermit crab, Areopaguristes tudgei, family Diogenidae, is fully described and illustrated, including a color photograph. A dense population of this new species was discovered living intertidally in a concealed habitat under coral boulders covered with calcareous algae, on the crest to fore-reef zone in Carrie Bow Cay, a small islan...
Article
Three species of deep water hermit crabs of the genus Parapagurus Smith, 1879, family Parapaguridae, were collected in the South Atlantic during studies of the fauna and ecology of the Mid-Atlantic Ridge, a seamount chain that is an important habitat, feeding ground, and site of reproduction for many open ocean and deep-sea species. The three speci...
Article
A new genus, Spathapagurus, is described for S. collinae n. sp. from the tropical eastern Pacific and its geminate species Pagurus longimanus Wass, 1963 from the tropical western Atlantic. These congeners share grossly unequal chelipeds, the right being narrowly spatulate and up to four times longer than the left. The males have short sexual tubes...
Article
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Annotated checklists of the world's Recent anomuran crustacean superfamilies Aegloidea, Hippoidea, Lithodoidea, Lomisoidea, Paguroidea and galatheoid family Porcellanidae are presented. Each is accompanied by brief reviews of the historical aspects of its classification, general external morphology, features of larval development and current phylog...
Article
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We present an updated classification for the entire Crustacea Decapoda, listing all known families and genera organized by higher taxonomic groups and including estimates of the number of species in every genus. All taxonomic names are also linked to the verified literature in which they were described, the first compilation of its kind for the Dec...
Article
A new classifi cation is presented based on the results of the recently completed cladistic analysis of the Pylochelidae. The subfamilies Pylochelinae and Pomatochelinae are retained, the latter with the genera Pylocheles and Cheiroplatea; however, the subgenera Xylocheles and Bathycheles are elevated to generic rank together with the nominal subge...
Article
Phylogenetic relationships within the "symmetrical" hermit crab family Pylochelidae were analyzed for 41 of the 45 species and subspecies currently considered valid. In the analyses, 78 morphological characters comprised the data matrix and the outgroup consisted of Thalassina anomala, a member of the Thalassinidae, and Munida quadrispina, a member...
Article
A new species of spider crab, Pyromaia acanthina, is described based on specimens collected during a recent sampling program along the Caribbean coast of Colombia. This new species is most similar to P. propinqua Chace, 1940, a species also collected during this study that had not been found or mentioned in the literature since its original descrip...
Article
Full-text available
We present an updated classification for the entire Crustacea Decapoda, listing all known families and genera organized by higher taxonomic groups and including estimates of the number of species in every genus. All taxonomic names are also linked to the verified literature in which they were described, the first compilation of its kind for the Dec...
Article
Full-text available
Decapod crustaceans in the vicinity of Carrie Bow Cay and Twin Cays, Belize, have been under study for more than 25 years. Large collections have been as-sembled, and new species have been discovered. The effort has included photographic documentation of coloration, yielding characters of value in identifi cation of problematic tropical taxa. Measu...
Article
The larvae of two species of the pylochelid genus Trizocheles are described from prematurely hatched specimens and compared with earlier described larvae of Pylocheles (Pylocheles) and Pomatocheles. Although all are lecithotrophic and exhibit marked advanced development, differences in the larval morphology among the three genera are profound. Con-...
Article
The larvae of two species of the pylochelid genus Trizocheles are described from prematurely hatched specimens and compared with earlier described larvae of Pylocheles (Pylocheles) and Pomatocheles. Although all are lecithotrophic and exhibit marked advanced development, differences in the larval morphology among the three genera are profound. Cons...
Data
FIGURE 6. Trizocheles vaubanae n. sp., ovig. female holotype (sl = 7.7 mm) (MNHN-Pg 7766). a, chela and carpus of left cheliped (outer face); b, left second pereopod (lateral view); c, propodus and carpus of left second pereopod (mesial view); d, right third pereopod (lateral view); e, tergite of sixth pleomere, protopods of uropods, and telson (do...
Data
FIGURE 2. Metazoea of Trizocheles spinosus spinosus (Henderson, 1888). a, cheliped; b, second pereopod; c, third pereopod; d, fourth pereopod; e, fifth pereopod; f, pleon and telson. Scales: 0.25 mm (a – e), and 1 mm (f).
Data
FIGURE 1. Metazoea of Trizocheles spinosus spinosus (Henderson, 1888). a, carapace (lateral view); b, antennule; c, antenna; d, mandible; e, maxillule; f, maxilla; g, first maxilliped; h, second maxilliped; i, third maxilliped. Scales: 1 mm (a), and 0.25 mm (b – i).
Data
FIGURE 5. Trizocheles vaubanae n. sp., a, ovig. female holotype (sl = 7.7 mm) (MNHN-Pg 7766), b – j, male paratype (sl = 4.3 mm) (MNHN-Pg 7770). a, shield and cephalic appendages (aesthetascs and some setae omitted); b, mandibular palp (left, inner surface); c, maxillule (left, outer face); d, maxilla (left, outer surface); e, first maxilliped (lef...
Data
FIGURE 3. Metazoea of Trizocheles vaubanae n. sp. a, antennule; b, antenna; c, mandible; d, maxillule; e, maxilla; f, first maxilliped, g, second maxilliped; h, third maxilliped. Scale: 0.25 mm.
Data
FIGURE 4. Metazoea of Trizocheles vaubanae n. sp., a – g: a, cheliped; b, second pereopod; c, third pereopod; d, fourth pereopod; e, fifth pereopod; f, pleon and telson; g, telson. Trizocheles spinosus spinosus (Henderson, 1888), h: telson. Scales: 0.25 mm (a – e), 1 mm (f), and 0.5 mm (g – h).
Article
The diagnosis of the recently described hermit crab genus Catapaguropsis Lemaitre & McLaughlin, 2006 is emended to accommodate a second distinctive new species, Catapaguropsis brucei n. sp., which does not exhibit the sexual dimor- phism described for the type species, C. queenslandica Lemaitre & McLaughlin, 2006. Catapaguropsis brucei n. sp. is ch...
Article
The diagnosis of the recently described hermit crab genus Catapaguropsis Lemaitre & McLaughlin, 2006 is emended to accommodate a second distinctive new species, Catapaguropsis brucei n. sp., which does not exhibit the sexual dimorphism described for the type species, C. queenslandica Lemaitre & McLaughlin, 2006. Catapaguropsis brucei n. sp. is char...
Article
A reexamination of the holotypes of Pylocheles cubensis Ortiz & Gómez, 1986 and Pylocheles (Bathycheles) chacei Forest, 1987 has shown that these two deep-water taxa are identical. Pylocheles cubensis is the senior synonym and is assigned to the subgenus Bathycheles Forest, 1987, replacing P. (B.) chacei as the single Western Atlantic representativ...
Article
The hypothesis of monophyly in Paguroidea and the relationship of this superfamily to the other three superfamilies of Anomura have been reassessed using current cladistic methods and computer generated analysis. In the analysis, 79 external morphological characters were examined for an in-group consisting of the seven paguroid families, Pylochelid...
Article
A new genus, Catapaguropsis, and new species, Catapaguropsis queenslandica, are described from off Queensland, northeastern Australia. The new genus is compared and contrasted to two other genera of the family Paguridae, Catapagurus and Pteropagurus, with which it shares certain common characters. The new species is notable for its exhibited sexual...
Article
A new genus, Catapaguropsis, and new species, Catapaguropsis queenslandica, are described from off Queensland, northeastern Australia. The new genus is compared and contrasted to two other genera of the family Paguridae, Catapagurus and Pteropagurus, with which it shares certain common characters. The new species is notable for its exhibited sexual...
Article
Two new parapagurid species with subconical corneas, Oncopagurus conicus n. sp. and Paragiopagurus schnauzer n. sp., are described based on collections by French expeditions to New Caledonia, the Philippines and Solomon Islands, in the western Pacific. These represent the 16th and 18th documented species of Oncopagurus Lemaitre, 1996 and Paragiopag...
Article
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We report here the first Chinese mitten crabs, Eriocheir sinensis H. Milne Edwards, 1853, found in the Chesapeake Bay, USA. Two male specimens were caught, retained, and identified from the mouth of the Patapsco River, near Baltimore, Maryland. The first crab to be reported was captured on 9 June 2006. Surprisingly, the second reported crab was cap...
Article
—Male gonopores on most hermit crabs (Paguroidea) occur as circular or oval ap- ertures on the coxae of the fifth pereopods, are flush with the surrounding coxal segment, may be covered by a membrane or a calcified operculum, and are normally associated with numerous com- plex setae. In many male paguroids of the fami- Ues Paguridae and Coenobitida...
Article
A new species of Paguridae, Pagurus ikedai, from the Tokyo Submarine Canyon and vicinity, Japan, is described and fully illustrated, including information on live coloration. This new species is distinguished primarily by size and shape of the chelipeds, in particular the massiveness of the left, and the presence in some males of a papilla or very...
Article
A new species of Paguridae, Pagurus ikedai, from the Tokyo Submarine Canyon and vicinity, Japan, is described and fully illustrated, including information on live coloration. This new species is distinguished primarily by size and shape of the chelipeds, in particular the massiveness of the left, and the presence in some males of a papilla or very...
Article
Full-text available
Species of the parapagurid genus Strobopagurus Lemaitre, 1989 are reviewed based primarily on abundant specimens obtained during French campaigns across the Indo-Pacific region. A new species, S.breviacus , is described. The genus contains two other species, S. gracilipes (A. Milne-Edwards, 1891), the type of the genus, and S.sibogae (de Saint Laur...
Article
Two new species of the hermit crab genus Lithopagurus Provenzano, 1968 are described and illustrated together with an illustrated and detailed diagnosis of the type species, L. yucatanicus Provenzano, 1968 that is included for compar­ ative purposes. This genus, heretofore monotypic and known only from off the Atlantic coast of Mexico, is now repor...