Four New Species of Labronema Thorne, 1939 From Islands in the Western Indian Ocean (Nematoda: Dorylaimoidea)

Two new species of Leptarma, L. dispersum n. sp. and L. reunionense n. sp. are described from Europa Island and Réunion Island, respectively. Genetically, based on the mitochondrial COX1 gene, both species are markedly divergent from other congeneric species. Phylogenetically, L. dispersum n. sp. shows close relationship with L. lenzii (De Man, 1895) while L. reunionense n. sp. clusters with L. aurifrons (Li, Ng & Shih, 2019) and the species pair L. moluccense (De Man, 1892) and L. paucitorum (Rahayu & Ng, 2009). Morphologically, the new species differ most significantly from congeners by the relative length of the ambulatory legs and the shapes of the first gonopods and carapace. After the description of these two new species, the number of species comprised in the genus Leptarma is raised to 20, four of them being distributed in and off East Africa.

Download Full-text

Callogobius winterbottomi, a new species of goby (Teleostei: Gobiidae) from the Western Indian Ocean

Zootaxa ◽

10.11646/zootaxa.3630.1.6 ◽

2013 ◽

Vol 3630 (1) ◽

pp. 155-164 ◽

Cited By ~ 2

Author(s):

NAOMI R. DELVENTHAL ◽

RANDALL D. MOOI

Keyword(s):

South Africa ◽

New Species ◽

Indian Ocean ◽

Western Indian Ocean ◽

Caudal Peduncle ◽

Additional Specimen ◽

Group A ◽

Urogenital Papilla ◽

A New Species

Callogobius winterbottomi new species is described from the 33.8 mm SL holotype and two paratypes (32.2 mm SL and 22.9 mm SL) from the Comoros, Western Indian Ocean. It is distinguished from all other known Callogobius species by the following combination of characters: sensory pores absent, 23–26 scales in lateral series, and sensory papillae pre-opercular row not continuous with transverse opercular row. One additional specimen of Callogobius winterbottomi was located from South Africa. A new standardized naming system for Callogobius sensory papillae rows is presented for identification and clarification of character states among Callogobius species. The new species is tentatively placed among what we term the “sclateri group”, a clade including C. sclateri (Steindachner) and three other species that exhibit a modified female urogenital papilla with lateral distal flaps and elongate ctenii on the caudal peduncle scales. Callogobius tutuilae (Jordan & Seale) is removed from synonymy with C. sclateri because it has partially united pelvic fins (vs separate) and the preopercular sensory papillae row is continuous with the transverse opercular row (vs separate).

Download Full-text

A new species of Saurida (Pisces: Synodontidae) from the Mascarene Plateau, Western Indian Ocean

Zootaxa ◽

10.11646/zootaxa.3947.3.10 ◽

2015 ◽

Vol 3947 (3) ◽

pp. 440

Author(s):

BARRY C. RUSSELL

Keyword(s):

New Species ◽

Indian Ocean ◽

Western Indian Ocean ◽

A New Species

Download Full-text

Two new species of Trevathana (Crustacea, Cirripedia, Balanomorpha, Pyrgomatidae) from the Western Indian Ocean and French Polynesia

Zootaxa ◽

10.11646/zootaxa.2116.1.2 ◽

2009 ◽

Vol 2116 (1) ◽

pp. 46-52 ◽

Cited By ~ 1

Author(s):

YAIR ACHITUV ◽

YAAKOV LANGZAM

Keyword(s):

New Species ◽

Indian Ocean ◽

Western Indian Ocean ◽

French Polynesia ◽

Terra Incognita ◽

Two New Species ◽

The Indian Ocean ◽

Basal Margin ◽

Ocean Islands

Two new species of the Pyrgomatid barnacle Trevathana are described: Trevathana synthesysae nov. sp., extracted from Plesiastrea versipora from the Indian Ocean Islands Réunion and Mauritius, and Trevathana isfae nov. sp. from a colony of Favia stelligera from French Polynesia, which, until recently, was terra incognita with regard to coral-inhabiting barnacles. The two new species are distinctive by their relatively broad scutum as compared to Trevathana dentatum, their prominent adductor ridge extending beyond the basal margin of the scutum, and their quadrangular tergum.

Download Full-text

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 ◽

10.11646/zootaxa.3550.1.4 ◽

2012 ◽

Vol 3550 (1) ◽

pp. 61 ◽

Cited By ~ 6

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.

Download Full-text

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 ◽

10.11646/zootaxa.4208.5.1 ◽

2016 ◽

Vol 4208 (5) ◽

pp. 401 ◽

Cited By ~ 5

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.

Download Full-text