A new species of the stenopodidean shrimp genus Odontozona Holthuis, 1946 (Crustacea: Decapoda: Stenopodidea: Stenopodidae) from the Ryukyu Islands, Indo-West Pacific

Zootaxa ◽  
2018 ◽  
Vol 4450 (4) ◽  
pp. 458
Author(s):  
TOMOMI SAITO ◽  
YOSHIHISA FUJITA
Keyword(s):  
New Species ◽  
Morphological Characters ◽  
Ryukyu Islands ◽  
West Pacific ◽  
The Third ◽  
Ascension Island ◽  
Pleural Surface ◽  
The Ryukyu Islands ◽  
A New Species ◽  
Submarine Caves

A new species of the stenopodidean shrimp genus Odontozona Holthuis, 1946 is described and illustrated on the basis of 3 specimens recently collected from submarine caves of Okinawa-jima and Ie-jima Islands, the Ryukyu Islands, southwestern Japan, Indo-West Pacific. Odontozona okunoi sp. nov. closely resembles O. anaphorae Manning & Chace, 1990 described from Ascension Island, South Atlantic Ocean, but differs from it by a combination of morphological characters, including the large cardiac spine on the carapace, the spines on the pleural surface, the posterior tooth of the telson, the irregular row of small spines on the dorsomesial surface of the third pereopod chela, as well as the length ratio of the third pereopod chela against carpus and merus. This study increases the total number of species described in the genus Odontozona to 21, nine of which occur the Indo-West Pacific. 

A new species of sardine, Sardinella electra (Teleostei: Clupeiformes: Clupeidae), from the Ryukyu Islands, Japan

Zootaxa ◽  
2019 ◽  
Vol 4565 (2) ◽  
pp. 274 ◽  
Author(s):  
HARUTAKA HATA ◽  
HIROYUKI MOTOMURA
Keyword(s):  
New Species ◽  
Black Spot ◽  
Gill Arch ◽  
Ryukyu Islands ◽  
Caudal Fin ◽  
The Third ◽  
Dorsal Fin ◽  
The Ryukyu Islands ◽  
Gill Raker ◽  
A New Species

A new species of sardine, Sardinella electra, is described on the basis of 18 specimens collected from the Ryukyu Islands, Japan. The new species closely resembles Sardinella hualiensis (Chu & Tsai 1958) in that both species have a caudal fin with black tips, a black spot on the dorsal-fin origin, and both have lateral scales with centrally continuous or overlapping longitudinal striae. However, the new species is distinguished from S. hualiensis by its higher total gill-raker counts on the first, second, third and fourth gill arches, and on the posterior face of the third gill arch (105–121, 107–120, 88–104, 65–82, and 25–31, respectively, vs. 87–107, 83–105, 67–90, 53–69, and 13–27), and in having scales with few perforations and lacking pores posteriorly (vs. scales with numerous perforations and pores on their posterior margins). 

A review of the records of Pachycheles rugimanus A. Milne-Edwards, 1880 (Crustacea: Decapoda: Anomura: Porcellanidae) from Brazil, with the description of a new species

Zootaxa ◽  
2019 ◽  
Vol 4568 (1) ◽  
pp. 185 ◽  
Author(s):  
LUCIANE AUGUSTO DE AZEVEDO FERREIRA ◽  
MARCOS TAVARES
Keyword(s):  
New Species ◽  
Morphological Characters ◽  
The Other ◽  
Eastern Pacific ◽  
Brazilian Coast ◽  
Galapagos Island ◽  
Western Atlantic ◽  
The Third ◽  
Cocos Island ◽  
A New Species

All previous records of Pachycheles rugimanus A. Milne-Edwards, 1880, from the Brazilian coast are reviewed and prove to represent a new species, P. coelhoi sp. nov. (from Amapá, northern Brazilian coast), and P. ackleianus A. Milne-Edwards, 1880, a species already known from Brazil (from Pará to Rio de Janeiro). The new species is described and illustrated, and compared to its most similar congeners: P. rugimanus and P. ackleianus from the western Atlantic, and P. velerae Haig, 1960, from the eastern Pacific (Galapagos Island and Cocos Island). Pachycheles coelhoi sp. nov. is distinguishable from the other three species by a suite of morphological characters, which include the ornamentation of the carapace and chelipeds, and the shape of the third thoracic sternite. All previous records of P. rugimanus from Brazil are considered invalid. 

A new species of Trichopagurus de Saint Laurent (Crustacea: Decapoda: Anomura: Paguridae) from the Ryukyu and Yap Islands, and redescription of T. trichophthalmus (Forest)

Zootaxa ◽  
2005 ◽  
Vol 801 (1) ◽  
pp. 1
Author(s):  
TOMOYUKI KOMAI ◽  
MASAYUKI OSAWA
Keyword(s):  
New Species ◽  
Hermit Crab ◽  
Type Species ◽  
Ventral Surface ◽  
Ryukyu Islands ◽  
Crab Species ◽  
The Ryukyu Islands ◽  
Gill Lamellae ◽  
A New Species

Discovery of a new hermit crab species from the Ryukyu Islands, Japan, led us to reexamine the holotype and supplemental specimens of Trichopagurus trichophthalmus (Forest), the type species of the heretofore monotypic Trichopagurus de Saint Laurent. Our examination has revealed that the gill lamellae of T. trichophthalmus are actually entire (= biserial), rather than shallowly divided distally (= quadriserial) as reported by de Saint Laurent (1970). The new species is assigned to Trichopagurus because of the 11 pairs of biserial gills, well-developed rostrum, moderately long male right sexual tube directed toward exterior, and the possession of a single left gonopore in female. The new species, T. macrochela n. sp., is distinguished from T. trichophthalmus primarily by the dorsoventrally flattened carpus with a distinctly delimited dorsomesial margin, less setose ambulatory legs, and markedly asymmetrical coxae of the female fifth pereopods, of which the left bears numerous setae on the ventral surface. It has been also shown that previous records of T. trichophthalmus from the Palau and Yap Islands are based on both true T. trichophthalmus and T. macrochela. A comparative, updated redescription of T. trichophthalmus is also provided.

A new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicida: Eunicidae) from northern Australia and a review of similar taxa from the Indo-west Pacific, including the genus Nauphanta Kinberg, 1865

Zootaxa ◽  
2010 ◽  
Vol 2352 (1) ◽  
pp. 29 ◽  
Author(s):  
CHRISTOPHER J. GLASBY ◽  
PAT A. HUTCHINGS
Keyword(s):  
New Species ◽  
First Record ◽  
Morphological Characters ◽  
Fish Farm ◽  
Unique Combination ◽  
Northern Australia ◽  
Coastal Regions ◽  
West Pacific ◽  
Peculiar Behaviour ◽  
A New Species

A taxonomic survey of Marphysa species (Polychaeta: Eunicida: Eunicidae) from coastal regions of northern Australia including recently collected specimens from a fish farm near Darwin, yielded three species: M. mullawa Hutchings & Karageorgopolous, 2003, a first record from northern Australia; M. mossambica (Peters, 1854; was Nauphanta mossambica), first confirmed record from Australia; and a new species, M. fauchaldi. The new species was recorded from intertidal muddy shores as well as in the sediments of fish farm ponds, where it was extremely abundant. It is characterised by a unique combination of chaetal features. A newly proposed informal subgroup of Marphysa, the Teretiuscula-group, is erected to contain the new species and other Marphysa species that share the possession of compound spinigerous chaetae in anterior parapodia only and the peculiar behaviour of encapsulating embryos in jelly cocoons. Morphologically, the new species falls between a group of Marphysa species having only compound spinigers and the recently resurrected genus Nauphanta, which completely lacks compound chaetae. The discovery of this new species necessitated a re-evaluation of the morphological features of Nauphanta and Marphysa species lacking falcigers, in particular homology of fan chaetae, the only apparent synapomorphy of Nauphanta. Fan chaetae appear to be a specialised type of pectinate chaetae, which are found also in species of Marphysa including the new species. Based on this finding, and an evaluation of other characters, Nauphanta is returned to synonymy with Marphysa. Further, an analysis of size-related variation of key morphological characters in M. mossambica and comparison with those in the types of M. novaehollandiae (Kinberg, 1865; formerly Nauphanta) and M. simplex Treadwell, 1922, indicated that both species should be synonymised with M. mossambica. A key is provided to identify Marphysa species of the Indo-west Pacific.

Cinetorhynchus gabonensis, a new species of hinge-beak shrimp (Crustacea: Decapoda: Rhynchocinetidae) from the eastern Atlantic

Zootaxa ◽  
2019 ◽  
Vol 4664 (2) ◽  
pp. 191-205
Author(s):  
ZDENĚK ĎURIŠ ◽  
ANNA ŠOBÁŇOVÁ ◽  
PETER WIRTZ
Keyword(s):  
New Species ◽  
Colour Pattern ◽  
Western Atlantic ◽  
West Pacific ◽  
The Third ◽  
White Spots ◽  
A New Species

A new species of the rhynchocinetid genus Cinetorhynchus, C. gabonensis sp. n. from the Atlantic waters of Gabon, is described based on morphological and molecular comparisons and its distinctive colour pattern. This is the second known species of the genus in the eastern Atlantic, and the third species in the Atlantic as the whole. The new species is more closely related to the western Atlantic C. manningi, both having quadrispinose ambulatory dactyli (i.e. with unguis + 3 ventral spinules), but differs from the latter by the presence of an arthrobranch on the three anterior pereiopods (vs only on the first pereiopod in C. manningi). The branchial formula of the new species is consistent with most of the Indo-West Pacific congeners, and with the amphi-Atlantic C. rigens; the latter possessing trispinose ambulatory dactyli. Other distinctions of the new species from its congeners are in the carpal and meral spinulation of the ambulatory legs, and in the posterolateral and posteroventral armament of pleomeres IV and V. Cinetorhynchus gabonensis sp. n. differs from both known Atlantic congeners also by a specific colour pattern which is dense deep-red mottled with a pair of small white spots delineated by deep-red broad rings on the top of the third pleomere. 

Eriocheir ogasawaraensis Komai, a new species of mitten crab (Crustacea: Decapoda: Brachyura: Varunidae) from the Ogasawara Islands, Japan, with notes on the systematics of Eriocheir De Haan, 1835

Zootaxa ◽  
2006 ◽  
Vol 1168 (1) ◽  
pp. 1 ◽  
Author(s):  
T. KOMAI ◽  
I. YAMASAKI ◽  
S. KOBAYASHI ◽  
T. YAMAMOTO ◽  
S. WATANABE
Keyword(s):  
New Species ◽  
Russian Far East ◽  
Far East ◽  
Ryukyu Islands ◽  
Crab Species ◽  
Ogasawara Islands ◽  
Mitten Crab ◽  
The Ryukyu Islands ◽  
A New Species ◽  
The Russian Far East

A new mitten crab species of the genus Eriocheir De Haan, 1835, E. ogasawaraensis n. sp., is described from the Ogasawara Islands, Japan. It is morphologically most similar to E. japonica (De Haan, 1835), found on the Japanese mainland, the Ryukyu Islands, Taiwan, the Russian Far East, Korea and China, but diagnostic is the proportionately broader and dorsally flattened carapace which usually lacks the fourth anterolateral tooth, the ornamentation of the epistome, the male first gonopod and its the coloration. The biology of the new species and the different interpretations concerning the systematics of Eriocheir are briefly discussed.

Two new species of Pagurixus (Crustacea: Decapoda: Anomura: Paguridae) from submarine caves of the Ryukyu Islands, southwestern Japan

Zootaxa ◽  
2006 ◽  
Vol 1148 (1) ◽  
pp. 27 ◽  
Author(s):  
MASAYUKI OSAWA ◽  
YOSHIHISA FUJITA ◽  
JUNJI OKUNO
Keyword(s):  
New Species ◽  
Ventral Surface ◽  
Species Group ◽  
Anterior Lobe ◽  
Ryukyu Islands ◽  
Ultimate Segment ◽  
The Ryukyu Islands ◽  
Two New Species ◽  
Submarine Caves ◽  
Antennular Peduncle

Two new species of Pagurixus Melin, 1939, P. pulcher and P. longipes, are described from the submarine caves of the Ryukyu Islands, southwestern Japan. These species belong to the different informal species group of the genus characterized by the presence or absence of two distinct, longitudinal rows or series of setae on the ventral surface of the antennular ultimate segment. Pagurixus pulcher is most closely allied to P. nomurai Komai & Asakura, 1995, but is differentiated by the more slender ocular peduncles, setation on the ultimate segment of the antennular peduncle, and shape of the anterior lobe of the sixth thoracic sternite. The extremely long and slender carpus of the left cheliped and dactyli of the ambulatory pereopods clearly distinguish P. longipes from other species belonging to the species group characterized by the absence of longitudinal rows or series of setae on the ventral surface of the antennular ultimate segment.

A review ofLeptocarisincluding a description ofL. ryukyuensissp. nov. (Copepoda: Harpacticoida: Darcythompsoniidae)

2011 ◽  
Vol 92 (5) ◽  
pp. 1073-1081 ◽  
Author(s):  
Sung Joon Song ◽  
Hans-Uwe Dahms ◽  
Jong Seong Khim
Keyword(s):  
New Species ◽  
East Asia ◽  
Sandy Beach ◽  
Endopodal Segment ◽  
Ryukyu Islands ◽  
Caudal Ramus ◽  
The Third ◽  
The Ryukyu Islands

We provide a review on scientific contributions concerned withLeptocaris(Harpacticoida: Copepoda) that includes the zoogeography, ecology, biology, and morphology of this genus. A tabular key is given to aid in the identification of theignavus-group.Leptocaris ryukyuensissp. nov. is included on the basis of specimens collected from Akeijima sandy beach of the Ryukyu Islands in Japan. The new species can be distinguished from its congeners by an abexopodal seta and 3 exopodal setae on A2, a barbed inner seta on the proximal, endopodal segment of female P1 to P3, setae of the caudal ramus (setae I and II are very small, and the basal seta is transformed to a big spine), and modified inner setules of P2 enp-2 and P3 enp-2 in the males. The new species belongs to theignavus-group established by Kunz (1994) and is the third species of the genusLeptocarisin East Asia.

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