Bythaelurus vivaldii, a new deep-water catshark (Carcharhiniformes, Scyliorhinidae) from the northwestern Indian Ocean off Somalia

Zootaxa ◽  
2017 ◽  
Vol 4263 (1) ◽  
pp. 97 ◽  
Author(s):  
SIMON WEIGMANN ◽  
CARINA JULIA KASCHNER
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Deep Water ◽  
Western Indian Ocean ◽  
Valid Species ◽  
Caudal Fin ◽  
Virtual Absence ◽  
Dorsal Fin ◽  
Dermal Denticle ◽  
Fin Length

A new very small deep-water catshark, Bythaelurus vivaldii, is described based on two female specimens caught off Somalia in the northwestern Indian Ocean during the German ‘Valdivia’ expedition in 1899. It is morphologically closest to the recently described B. bachi, which is the only other Bythaelurus species in the western Indian Ocean that shares a stout body of large specimens and the presence of oral papillae. It further resembles B. vivaldii in the broad mouth and broad posterior head, but differs in the presence of composite oral papillae and a higher diversity in dermal denticle morphology. Additionally, the new species differs from all congeners in the western Indian Ocean in a larger pre-second dorsal fin length, a longer head, a larger interdorsal space, a larger intergill length, a longer pectoral-fin posterior margin, a shorter caudal fin, an intermediate caudal fin preventral margin, and a larger internarial width. Furthermore, the second dorsal fin of the new species is smaller than in its congeners in the western Indian Ocean except for B. lutarius, which is easily distinguished by the slender body and virtual absence of oral papillae, as well as the aforementioned further characters. An updated key to all valid species of Bythaelurus is provided.

Bythaelurus bachi n. sp., a new deep-water catshark (Carcharhiniformes, Scyliorhinidae) from the southwestern Indian Ocean, with a review of Bythaelurus species and a key to their identification

Zootaxa ◽  
2016 ◽  
Vol 4208 (5) ◽  
pp. 401 ◽  
Author(s):  
SIMON WEIGMANN ◽  
DAVID A. EBERT ◽  
PAUL J. CLERKIN ◽  
MATTHIAS F.W. STEHMANN ◽  
GAVIN J.P. NAYLOR
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Deep Water ◽  
Body Shape ◽  
Western Indian Ocean ◽  
Maximum Size ◽  
Dermal Denticle ◽  
Partially Composite ◽  
High Diversity ◽  
Southwestern Indian Ocean

A new deep-water catshark, Bythaelurus bachi, is described based on 44 specimens caught on the southern Madagascar Ridge in the southwestern Indian Ocean. The new species is the only stout-bodied Bythaelurus with oral papillae in the region and is distinguished from all congeners by the plain beige to light gray-brown coloration, high diversity in dermal denticle morphology, and presence of composite oral papillae. Despite resemblance in body shape, Bythaelurus bachi n. sp. is distinguished from its closest congener, B. naylori Ebert & Clerkin, 2015, by the presence of numerous large, partially composite papillae on the tongue and roof of the mouth (vs. papillae lacking), plain light coloration (vs. medium to dark brown ground color, light fin edges and a distinctly dark dusky-colored snout), only slightly enlarged dermal denticles on the anterior upper caudal-fin margin (vs. dermal denticles distinctly enlarged), a higher diversity in dermal denticle morphology in general, and smaller maximum size and size at maturity. The distinction of both species is also supported by molecular results. The new species differs from all other congeners in the western Indian Ocean in the stout body shape of large specimens, coloration, larger size, as well as several morphometrics, including larger claspers, longer eyes and dorsal fins, and shorter pelvic—anal and pelvic—caudal spaces. The genus is reviewed, a key to its species given. 

A new deep-water goatfish of the genus Upeneus (Mullidae) from northern Australia and the Philippines, with a taxonomic account of U. subvittatus and remarks on U. mascareinsis

Zootaxa ◽  
2012 ◽  
Vol 3550 (1) ◽  
pp. 61 ◽  
Author(s):  
FRANZ UIBLEIN ◽  
MARK MCGROUTHER
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Deep Water ◽  
Western Indian Ocean ◽  
First Record ◽  
The Philippines ◽  
Northern Australia ◽  
Meristic Characters ◽  
The Pacific ◽  
Interspecific Comparisons

Upeneus stenopsis n. sp. is described based on four specimens collected off northern Australia and Quezon Island,Philippines, at depths between 165 to 275 m and compared with four closely related species: the deep-water dwellingUpeneus davidaromi (Red Sea) and U. mascareinsis (Western Indian Ocean) and the shallow Indo-West Pacific species,U. subvittatus and U. vittatus. The new species can be distinguished from all other Upeneus species by a narrow caudalpeduncle and a combination of morphometric and meristic characters. This is the first record of a deep-water goatfish ofthe genus Upeneus from the Pacific. A juvenile Upeneus collected off Quezon at 127–142 m depth was also assigned tothe new species and compared to four similar-sized (69–79 mm SL) specimens of U. mascareinsis. A diagnosis is providedfor U. subvittatus, along with evidence of its occurrence in the Eastern Indian Ocean and interspecific comparisons. Thecontinued need to screen scientific fish collections for the occurrence of undescribed species that have successfully colonized and adapted to the depth zone surrounding the ocean margin is outlined.

New species of the anthiadin genus Sacura (Perciformes: Serranidae) from the Andaman Sea

Zootaxa ◽  
2017 ◽  
Vol 4306 (2) ◽  
pp. 291 ◽  
Author(s):  
HIROYUKI MOTOMURA ◽  
TOMOHIRO YOSHIDA ◽  
VEERA VILASRI
Keyword(s):  
New Species ◽  
Lateral Line ◽  
Andaman Sea ◽  
Gill Rakers ◽  
Yellow Band ◽  
Body Depth ◽  
Caudal Fin ◽  
Dorsal Fin ◽  
Fin Rays ◽  
Fin Length

Sacura sanguinea n. sp. (Serranidae: Anthiadinae) is described on the basis of two male and one female specimens from the Andaman Sea. The new species is characterized by the following characters: dorsal-fin rays X, 15; pored lateral-line scales 34; gill rakers 8 + 23 = 31; body depth 42.6–44.7% of SL; head length 39.5–41.4% of SL; pectoral-fin length 32.4–33.1% of SL; poorly defined broad yellow band from anterior profile of head to middle of body, the band gradually becoming red around middle of body and ending at caudal-fin base; caudal fin with distinct red spots centrally; and large dark red blotch posteriorly on spinous portion of dorsal fin in females. 

A review of the deepwater cardinalfish genus Epigonus (Perciformes: Epigonidae) of the Western Indian Ocean, with description of two new species

Zootaxa ◽  
2018 ◽  
Vol 4382 (2) ◽  
pp. 261 ◽  
Author(s):  
MAKOTO OKAMOTO ◽  
OFER GON
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Gulf Of Aden ◽  
Gill Rakers ◽  
Dorsal Fin ◽  
Lower Jaw ◽  
Two New Species ◽  
Opercular Spine ◽  
Abdominal Vertebra

The fishes of the genus Epigonus Rafinesque, 1810 in the Western Indian Ocean (including the Red Sea and the Gulf of Aden) are reviewed. Twelve species of the genus are recognized: Epigonus angustifrons Abramov & Manilo, 1987; E. denticulatus Dieuzeide, 1950; E. elongatus Parin & Abramov, 1986; E. exodon Okamoto & Motomura, 2012; E. lenimen (Whitley, 1935); E. macrops (Brauer, 1906); E. marimonticolus Parin & Abramov, 1986; E. marisrubri Krupp, Zajonz & Khalaf, 2009; E. pectinifer Mayer, 1974; E. robustus (Barnard, 1927); E. telescopus (Risso, 1810); E. waltersensis Parin & Abramov, 1986, and two new species, E. bispinosus n. sp. and E. idai n. sp. Epigonus bispinosus and E. idai belong to the E. constanciae group, defined as having a pungent opercular spine, more than 45 pored lateral-line scales, and lacking an isolated dorsal fin spine between the first- and second dorsal fins. Epigonus bispinosus differs from other members of the group in having two small spines on the symphysis of lower jaw, a pair of ribs on the last abdominal vertebra, 10 + 15 vertebrae, 31–33 gill rakers and lacking a maxillary mustache-like process. Epigonus idai differs from other members of the group in having a pair of ribs on the last abdominal vertebra, 4–5 tiny projections present on symphysis of lower jaw, 10 + 15 vertebrae, strongly ctenoid scales, and 28–29 gill rakers, and in lacking a maxillary mustache-like process. A key to the species, photographs, diagnoses, and distributions in the Western Indian Ocean are given. 

Pseudanthias emma new species, with notes on a collection of anthiadine serranid fishes from off Myanmar (eastern Indian Ocean)

Zootaxa ◽  
2018 ◽  
Vol 4455 (3) ◽  
pp. 525
Author(s):  
ANTHONY C. GILL ◽  
PETER N. PSOMADAKIS
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Lateral Line ◽  
Posterior Margin ◽  
Soft Part ◽  
Black Spot ◽  
Junior Synonym ◽  
Eastern Indian Ocean ◽  
Caudal Fin ◽  
Dorsal Fin

Recent exploratory trawling off the coast of Myanmar by the R/V Dr Fridtjof Nansen has resulted in the collection of six species of anthiadine serranid fishes. Four of the species are represented by specimen vouchers: Pseudanthias emma sp. nov., P. gibbosus (Klunzinger), Odontanthias rhodopeplus (Günther) and Plectranthias sp. 1. The remaining two species are represented only by photographs: Plectranthias sp. 2 and Sacura sanguinea Motomura, Yoshida & Vilasri. Pseudanthias emma is described from the 107 mm SL holotype. It is distinguished from congeners in having the following combination of characters: dorsal rays X,16; pectoral rays 18; lateral-line scales 42; third dorsal-fin spine longest, prolonged; no papillae on posterior margin of orbit; soft part of dorsal with low scaly sheath; subopercle and interopercle indistinctly serrated; caudal fin weakly concave centrally, with elongate filaments extending from second to uppermost and second to lowermost branched rays. Plectranthias sp. 1 is a probable new species closely allied to P. sagamiensis (Katayama), from which it appears to differ in having fewer segmented dorsal rays and fewer rows of cheek scales. Plectranthias sp. 2 is a probable new species closely allied to P. alcocki Bineesh, Akhilesh, Gopalakrishnan & Jena, from which it appears to differ in lacking a large black spot on the operculum and dusky ventral spot on the abdomen. New character, habitat and distribution information is provided for all six species. Pseudanthias vizagensis Krishna, Rao & Venu is suggested as a probable junior synonym of P. pillai Heemstra & Akhilesh.

A review of the gobiid fish genus Trimma from the Chagos Archipelago, central Indian Ocean, with the description of seven new species

1984 ◽  
Vol 62 (4) ◽  
pp. 695-715 ◽  
Author(s):  
Richard Winterbottom
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Western Indian Ocean ◽  
Western Pacific ◽  
Valid Species ◽  
Gobiid Fish ◽  
Central Indian Ocean ◽  
The Pacific ◽  
Chagos Archipelago ◽  
The Western Pacific

The genus Trimma contains 17 nominal and 13 valid species. Five of these are here reported from the Chagos Archipelago: T. eviotops, T. macrophthalma, T. mendelssohni. T. nauclei, and T. taylori. An additional 7 species arc described as new and another is described but not named, for a total of 13 species known from these islands. The biogeographic affinities of Chagos species of Trimma appear to lie with the western Indian Ocean rather than the western Pacific, but the evidence is weak because of the lack of knowledge of the Pacific Trimma fauna.

Descriptions of four new species of Thysanophrys (Scorpaeniformes: Platycephalidae) from the Western Indian Ocean

Zootaxa ◽  
2013 ◽  
Vol 3608 (2) ◽  
pp. 127-136 ◽  
Author(s):  
LESLIE W. KNAPP
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Red Sea ◽  
Western Indian Ocean ◽  
Maximum Size ◽  
Color Pattern ◽  
Northern Indian Ocean ◽  
Dorsal Fin ◽  
Spine Structure ◽  
Pacific Species

Four new species of Thysanophrys are described from the Western Indian Ocean (WIO). T. rarita, known from a single specimen taken off Somalia, is provisionally placed in Thysanophrys and is distinguished by its color pattern and number of preocular and suborbital spines. T. tricaudata is described from three specimens taken at SCUBA stations off southwestern Sri Lanka. They differ from other western Indian Ocean (WIO) Thysanophrys in color pattern, lack of ocular flaps, number of dorsal fin spines and scale counts.  The remaining two new species are somewhat similar to the widespread Indo-Pacific species, T. chiltonae Schultz (1966). T. randalli is described from specimens taken at the Amirante Islands and Mauritius. It may also be widespread in the Indo-Pacific, but differs from T. chiltonae in nasal spine structure, color pattern, type of iris lappet margin, and in having a much shorter maximum size. T. springeri also appears to be a smaller species than T. chiltonae and, aside from one record off Djibouti, is restricted to Red Sea. It also differs from T. chiltonae in color pattern, in having fewer pectoral rays and fewer scale rows between the second dorsal-fin insertion and the lateral line. Although T. chiltonae is relatively common in the northern Indian Ocean, it does not appear to have entered the Red Sea.

scholarly journals Triplophysa pseudostenura, a new nemacheiline loach (Cypriniformes: Balitoridae) from the Yalong River of China

Zootaxa ◽  
2012 ◽  
Vol 3586 (1) ◽  
pp. 272 ◽  
Author(s):  
CHUNLIN HE ◽  
E ZHANG ◽  
ZHAOBIN SONG
Keyword(s):  
New Species ◽  
Yangtze River ◽  
Valid Species ◽  
Posterior Chamber ◽  
Caudal Peduncle ◽  
Caudal Fin ◽  
River Drainage ◽  
Dorsal Fin ◽  
A New Species ◽  
Yalong River

A new species of nemacheiline loach, Triplophysa pseudostenura, is described from the Yalong River, a tributary of theupper Yangtze River drainage in China. Previous collectors misidentified the species as T. stenura. Triplophysapseudostenura can be separated from T. stenura and other valid species of Triplophysa by the following combination ofcharacters: body smooth and without scales; head tapering; lips thin and smooth; trunk and caudal peduncle slender,laterally compressed; depth of caudal peduncle tapering posteroventrally approaching caudal fin; posterior chamber of gasbladder reduced or absent; intestine short, forming a zigzag loop posterior to bottom of ‘U’-shaped stomach; insertion of pelvic fins anterior to dorsal-fin origin; caudal fin deeply concave.

scholarly journals The species of Moloha Barnard, 1946, from the western Indian Ocean, with the description of a new species from India (Crustacea: Brachyura: Homolidae)

2015 ◽  
Author(s):  
Peter K.L. Ng ◽  
Appukuttannair Biju Kumar
Keyword(s):  
South Africa ◽  
New Species ◽  
Indian Ocean ◽  
Deep Water ◽  
Western Indian Ocean ◽  
Southern India ◽  
First Time ◽  
A New Species

The taxonomy of the deep-water homolid crabs Moloha grandperrini Guinot & Richer de Forges, 1995 and M. alisae Guinot & Richer de Forges, 1995 is re-examined, and the types redescribed and figured. Moloha alisae is reported from South Africa for the first time. A new species with an inflated carapace, M. tumida sp. nov., is also described from southern India and compared with its closest congeners.

scholarly journals Prognathodes geminus, a new species of butterflyfish (Teleostei, Chaetodontidae) from Palau

ZooKeys ◽  
2019 ◽  
Vol 835 ◽  
pp. 125-137 ◽  
Author(s):  
Joshua M. Copus ◽  
Richard L. Pyle ◽  
Brian D. Greene ◽  
John E. Randall
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Genetic Divergence ◽  
Western Indian Ocean ◽  
Color Pattern ◽  
Body Width ◽  
Body Depth ◽  
Dorsal Fin ◽  
Fin Rays ◽  
A New Species

A new species of the butterflyfish genus Prognathodes (Chaetodontidae) is described from two specimens collected at a depth of 116 m off Ngemelis Island, Palau. Prognathodesgeminussp. n. is similar to P.basabei Pyle & Kosaki, 2016 from the Hawaiian archipelago, and P.guezei (Maugé & Bauchot, 1976) from the western Indian Ocean, but differs from these species in the number of soft dorsal-fin rays, size of head, body width, and body depth. There are also subtle differences in life color, and substantial differences in the mtDNA cytochrome oxidase I sequence (d ≈ 0.08). Although genetic comparisons with P.guezei are unavailable, it is expected that the genetic divergence between P.guezei and P.geminus will be even greater than that between P.geminus and P.basabei. It is named for the strikingly similar color pattern it shares with P.basabei.

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