Abstract The present study deals with the intricate phylogenetic relationships within an important clade of caridean shrimp family Alpheidae, which includes genera Salmoneus, Deioneus, and Triacanthoneus. Using molecular data from four genes (16S, 18S, COI, H3), we herein provide most comprehensive hypothesis for this alpheid clade, 161 terminals representing 117 ESUs, i.e. genetically distinct species. Our analysis reveals well-supported larger Clades, as well 25 smaller clades,...

The present study deals with four species of the alpheid shrimp genus Alpheopsis Coutière, 1897 characterised by presence at least one strong carina on dorsal surface carapace. trigona (Rathbun, 1901) is redescribed based holotype from Puerto Rico and additional material US Virgin Islands Florida. Two new closely related to A. trigona, viz. paratrigona sp. nov. gotrina nov., are described, first several localities in tropical western Atlantic, second Pacific coast Panama Colombia. three...

A new infaunal species of the rare alpheid genus Harperalpheus Felder & Anker, 2007 is described from Bahía Málaga, Pacific coast Colombia, based on single, incomplete holotype specimen. leptodactylus sp. nov. may be easily separated western Atlantic type and only other genus, H. pequegnatae 2007, by several morphological characters first fifth pereiopod, as well antennular peduncle.

The recently described alpheid genus Triacanthoneus Anker, 2010 is reassessed based on new material from the Pacific and Caribbean coasts of Panama, southern Gulf Mexico. Salmoneus armatus tentatively transferred to latter redefined. A eastern species a single specimen collected by scuba diving off Coiba Island coast Panama. blanca sp. nov. closely related its only congener, T. pacificus 2010, which reported for first time Las Perlas Islands in Morphological variation toro discussed basis...

We present the first global assessment of extinction risk for a major group freshwater invertebrates, caridean shrimps. The all 763 species was assessed using IUCN Red List criteria that include geographic ranges, habitats, ecology and past threats. Indo-Malayan region holds over half diversity, with peak in Indo-China southern China. Shrimps primarily inhabit flowing water; however, significant subterranean component is present, which more threatened than surface fauna. Two are extinct...

The present study deals with five species of the alpheid shrimp genus Salmoneus Holthuis, 1955 from tropical eastern Pacific. One them is new to science and described as tiburon sp. nov. presently known only Las Perlas Archipelago in Panama can be distinguished all other congeners by dentition on cutting edges major chela, some dactylar teeth reminiscent shark teeth. It also one largest genus, carapace length both type specimens surpassing 8.0 mm. serratidigitus (Coutière, 1897), a an ample...

Alpheopsis keijii sp. nov. is described on the basis of material collected between 90 and 487 m in Japan, Philippines, Papua New Guinea Réunion Island. The new species belongs to A. trispinosa group morphologically closest (Stimpson, 1860), garricki Yaldwyn, 1971, shearmii (Alcock & Anderson, 1899), especially africana Holthuis, 1952. Field data indicates that may be associated with deep-water sponge grounds. A provisional key currently known provided.

A new species of the euryrhynchid shrimp genus Euryrhynchina Powell, 1976, E. puteola sp. nov., is described from Cameroon. The can be easily distinguished only other in genus, edingtonae by absence a setiferous lobe on eye peduncle, meral spine ambulatory pereiopods, shape scaphocerite tooth, single uropodal diaeresis (vs. 2-3), podobranch second maxilliped, and appendices internae male pleopods 2-5. Although was discovered phreatic well, it remains unclear if true stygobiont.

A new species of the alpheid shrimp genus Salmoneus Holthuis, 1955, probably an obligate associate ghost burrows, is described based on material from Oman (type locality: Darsait near Muscat), Iran and Philippines. durisi sp. nov. characterised principally by both chelipeds enlarged, robust, with ventral dorsal margins chelae carrying long fine setae, minor chela fingers armed a few large teeth cutting edges. All specimens were collected either directly burrows larger decapod crustaceans aid...

The alpheid shrimp Nennalpheus Banner & Banner, 1981, hitherto known only from a few records in the tropical western Pacific, is recorded for first time eastern Atlantic, as well Indian Ocean. gabonensis sp. nov. described based on single but complete male specimen collected mediocre visibility conditions at 11 m depth rocky reef north of Libreville, Gabon. new species presents substantial number morphological differences two other Nennalpheus, especially armature cheliped fingers....

A new snapping shrimp, Alpheus perlas sp. nov., is described based on a single complete male specimen collected shallow mudflat at Casayeta Island in the Las Perlas Archipelago, Gulf of Panama. The species belongs to large A. edwardsii (Audouin, 1821) group characterised essentially by presence two notches major chela palm, with dorsal notch extending posteriorly mesial surface. Within eastern Pacific members group, nov. appears be morphologically closest latus Kim Abele, 1988 and...

The alpheid genus Salmoneus Holthuis, 1955 is reported from Kuwait for the first time, with two species. One species, ikaros sp. nov., described based on a single specimen Failaka Island, extracted burrow of callianassid ghost-shrimp Balsscallichirus masoomi (Tirmizi, 1970), together host. new species characterised by its peculiar eyes, which other characters separate it all previously Salmoneus. second gracilipes Miya, 1972, three specimens different localities and habitats. Two were found...

A new alpheid shrimp genus, Pachelpheus gen. nov., is established to accommodate pachyacanthus sp. described based on two specimens from the Las Perlas Archipelago, Pacific coast of Panama. nov. appears be an obligate symbiont dwelling in burrows yet unknown infaunal hosts, shallow near-shore subtidal sand flats. The main morphological characters are: (1) frontal margin carapace with broadly rounded rostral projection, without orbital teeth; (2) sixth pleonite articulated plate; (3) telson...

A new alpheid shrimp, Salmoneus manningi sp. nov., is described based on material collected in the Indian River Lagoon Atlantic coast of Florida, USA. In addition, one two paratypes S. cavicolus Felder & Manning, 1986 assigned to species. All specimens nov. were extracted from burrows using a suction pump, sometimes together with burrowing mantis Lysiosquilla scabricauda (Lamarck, 1818), suggesting possible symbiosis between these crustaceans. Although morphologically similar cavicolus,...

In the present study, two deep-water species of caridean shrimp family Alpheidae are described from localities in Indo-West Pacific, each based on a single specimen. Bannereus kebir sp. nov. is female holotype collected at depth 230‑243 m Kai Islands, Indonesia. The new can be easily separated congeners, B. anomalus Bruce, 1988 and chani Anker & Pachelle, 2020, by presence strap-like epipods first to third pereiopods. Salmoneus profundus an incomplete hermaphrodite 218‑225 near Hanover...

The Alpheidae-possibly the most diverse family of recent decapod crustaceans-offers attractive opportunities to study evolution many intriguing phenomena, including key morphological innovations like spectacular snapping claws, highly specialized body forms, facultative and obligate symbioses with animal groups, sophisticated behaviors eusociality. However, studies these remarkable adaptations remain hampered by insufficient phylogenetic information. We present first hypothesis relationships...

A new species of the caridean shrimp genus Lysmata Risso, 1816 is described from St. Helena and Ascension Island in south-central Atlantic. napoleoni sp. nov. part so-called “long-branch group” shows a strong morphological similarity with eastern Atlantic L. seticaudata 1816, which it can be distinguished by details accessory branch antennular flagellum. The also displays unique bright colour pattern therefore easily recognised field. Furthermore, typically found proximity sea anemones,...

Five species of shrimps, four carideans and one stenopodidean, are recorded for the first time from Caribbean coast Panama: Lysmata vittata (Stimpson, 1860) [Lysmatidae Dana, 1852], Periclimenaeus ascidiarum Holthuis, 1951, P. bredini Chace, 1972, maxillulidens (Schmitt, 1936) [Palaemonidae Rafinesque, 1815], Odontozona edyli Criales Lemaitre, 2017 [Stenopodidae Claus, 1872]. Rather surprisingly, L. is Sea time. However, taxonomic status all western Atlantic specimens currently assigned to...

In July 2016, an important regional checklist entitled “Decapod crustaceans from the state of Ceará, northeastern Brazil: updated marine and estuarine species, with 23 new records” was published in journal Zootaxa (Pachelle et al. 2016). A few days after publication this monograph, two our colleagues specialised taxonomy ghost mud shrimps (Axiidea Gebiidea), Dr Mônica Botter-Carvalho (UFRPE) Peter C. Dworschak (NHMW), informed us that material reported under Neocallichirus maryae Karasawa,...

A new snapping shrimp is described based on several specimens collected a shallow coral reef off Isla Popa in Bocas del Toro, the Caribbean coast of Panama. All Alpheus naranjo sp. nov. were extracted from dead colonies thin-leaf lettuce coral, Agaricia tenuifolia Dana, at depth about 2 m. Based its morphological characteristics, species belongs to small complex that also includes A. blachei Crosnier Forest, 1965 tropical eastern Atlantic, and felgenhaueri Kim Abele, 1988 confusus Carvacho,...

Three species of the alpheid shrimp genus Salmoneus Holthuis, 1955 associated with burrows other decapod crustaceans are reported from various Indo-West Pacific localities. venustus sp. nov. is described based on material collected at two distant localities, Nha Trang Bay, southern Vietnam, type locality new species, and Yiti-Sifah region east Muscat, northern Oman. Both specimens were aid a suction pump applied to burrow entrances or mounds in muddy sand; holotype was possibly callianassid...

A new, conspicuously coloured species of the alpheid genus Synalpheus Spence Bate, 1888, is described based on material collected Pacific coast Panama. pinkfloydi sp. nov. closely related to western Atlantic S. antillensis Coutière, 1909, two taxa being transisthmian, cryptic sister species. Both are characterised by distal areas their major and minor chelae in an intense, almost glowing pink-red. The morphological differences between 1909 subtle, limited slightly different proportions merus...

A new palaemonid shrimp genus, Unesconia gen. nov., is established to accommodate a peculiar, small, presumably sponge-associated species, coibensis et sp. nov. The description of the genus and species based on several specimens found in shallow marine waters Coiba Archipelago, Pacific coast Panama. does not seem have close affinities other eastern or western Atlantic genera, including those harbouring sponge symbionts. On hand, it shares many characters with three Indo-West which contain...