A new species and nine new records of Syllidae (Annelida) from the Socotra Archipelago (Indian Ocean)

Zootaxa ◽  
2019 ◽  
Vol 4651 (2) ◽  
pp. 235-258
Author(s):  
YOLANDA LUCAS RODRÍGUEZ ◽  
GUILLERMO SAN MARTÍN ◽  
DIETER FIEGE
Keyword(s):  
Indian Ocean ◽  
New Records ◽  
Original Description ◽  
Gulf Of Aden ◽  
The Indian Ocean ◽  
Socotra Archipelago ◽  
A Chain ◽  
San Martín ◽  
A New Species ◽  
Insight Into

In this paper, we report 10 species of Syllidae, collected in the Socotra Archipelago (Indian Ocean). They belong to eight different genera in four subfamilies namely, Syllinae: Haplosyllis Langerhans, 1879, Megasyllis San Martín, Hutchings & Aguado, 2008, Opisthosyllis Langerhans, 1879, Trypanosyllis Claparède, 1864; Eusyllinae: Eusyllis Malmgren, 1867, Odontosyllis Claparède, 1863; Exogoninae: Salvatoria McIntosh, 1885; and Autolytinae: Myrianida Milne Edwards, 1845. Trypanosyllis mercedesae n. sp., is here formally described and distinguished from congeners. Trypanosyllis richardi Gravier, 1900 is re-described, adding important taxonomic information to the original description, based on specimens collected from Djibouti (Gulf of Aden). We provide new insight into the reproduction of Megasyllis heterosetosa (Hartmann-Schröder, 1991) with the description of a specimen with an attached female dicerous stolon, full of oocytes. Odontosyllis polycera (Schmarda, 1861) is described because it is newly recorded for the Indian Ocean. We also provide some remarks about Myrianida pachycera (Augener, 1913), collected with a chain of stolons. 

New species and records of the genus Syllis Savigny in Lamarck, 1818 (Annelida: Syllidae) from Socotra Archipelago (Indian Ocean)

Zootaxa ◽  
2020 ◽  
Vol 4742 (1) ◽  
pp. 73-88
Author(s):  
YOLANDA LUCAS RODRÍGUEZ ◽  
GUILLERMO SAN MARTÍN ◽  
DIETER FIEGE
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Valid Species ◽  
New Findings ◽  
The Indian Ocean ◽  
Socotra Archipelago ◽  
San Martín ◽  
A New Species

Based on a census of the polychaete fauna of the Socotra Archipelago in the Indian Ocean we report here new findings on the genus Syllis Savigny in Lamarck, 1818. These ten species are newly recorded from this area: Syllis alternata Moore, 1908; Syllis bouvieri Gravier, 1900; Syllis broomensis (Hartmann-Schröder, 1979); Syllis compacta Gravier, 1900; Syllis crassicirrata (Treadwell, 1925); Syllis gerlachi (Hartmann-Schröder, 1960); Syllis hyalina Grube, 1863; Syllis lutea (Hartmann-Schröder, 1960); Syllis schulzi (Hartmann-Schröder, 1960); Syllis ypsiloides Aguado, San Martín & Ten Hove, 2008. Additionally, Syllis qamhiyn sp. nov. is described as a new species, characterized by its conspicuously thick and short dorsal cirri filled with a gelatinous substance and reduced number of compound chaetae from medium to posterior parapodia, with enlarged shafts and short blades which become almost unidentate and do not fuse with shafts. Following an examination of the holotype of S. bouvieri, its status as a valid species and not as synonym of Syllis prolifera Krohn, 1852, as considered by some authors (see Licher 1999) is confirmed, and a redescription is included. 

scholarly journals FIRST RECORD OF EIGHT BRACHYURAN CRABS’ SPECIES (CRUSTACEA-DECAPODA) IN SOCOTRA ARCHIPELAGO IN THE INDIAN OCEAN-YEMEN

2020 ◽  
Vol 1 (4) ◽  
Author(s):  
Abdullah N. Al-Hindi ◽  
Wolfgang Wranik ◽  
Michael Apel ◽  
Stefan Forster ◽  
Roland Melzer
Keyword(s):  
Indian Ocean ◽  
First Record ◽  
Rocky Shores ◽  
Gulf Of Aden ◽  
Horn Of Africa ◽  
Brachyuran Crab ◽  
Socotra Island ◽  
The Indian Ocean ◽  
Brachyuran Crabs ◽  
Socotra Archipelago

Yemen has a number of islands on the Red Sea, including Kamaran, Uqban, Hanish Archipelago Islands, Mayun (older name: Perim), and many islands at the Gulf of Aden, in the Indian Ocean, this also includes the Socotra Archipelago located 240 km from the east of the Horn of Africa and 380 km from Yemen. Socotra Island has a variety of habitats including sandy shores, rocky shores, mud flats, sponge areas, coral reefs, and freshwaters. This study aims to record the brachyuran crab’s species in different habitats in Socotra Archipelago. The specimens of the brachyuran crabs collected by hand, hand nets, and snorkeling up to 3-meter depth. The specimens were collected from 6 sites in Socotra Islands during separate periods time from 1984 to 2000, these specimens kept in Rostock University and Zoologische Staatssammlung München (ZSM)-Germany. In this present study, 32 brachyuran crabs’ species were recorded belonging to 11 superfamilies, 14 families, and 29 genera. Eight of these species represent the first records in Socotra Islands. The dominant brachyuran crab families in this region were Xanthidae, 35% with 11 species recorded, followed by Grapsidae, 19% with 6 species.

scholarly journals The caridean shrimps of the genus Lysmata Risso, 1816 (Decapoda: Lysmatidae) from Madagascar collected during the Atimo-Vatae expedition: a new species and two new records

2021 ◽  
Vol 774 ◽  
pp. 155-177
Author(s):  
Hossein Ashrafi ◽  
J. Antonio Baeza ◽  
Zdeněk Ďuriš
Keyword(s):  
New Species ◽  
New Records ◽  
Original Description ◽  
Western Atlantic ◽  
West Pacific ◽  
Phylogenetic Studies ◽  
The Caribbean ◽  
De Man ◽  
First Time ◽  
A New Species

The present study focuses on shrimps belonging to the genus Lysmata Risso, 1816, collected from Madagascar during the Atimo Vatae expedition carried out in 2010. Lysmata malagasy sp. nov. is a new species belonging to the clade named “long accessory ramous” or “cosmopolitan” in previous phylogenetic studies. The new species can be distinguished from the only two other representatives of this group in the Indo-west Pacific, L. ternatensis De Man, 1902, and L. trisetacea (Heller, 1861), by the accessory ramus of the lateral antennular flagellum consisting of four elongated articles. Lysmata lipkei Okuno & Fiedler, 2010 is reported here from Madagascar with a remarkable extension of its known range after its original description from Japan. This species has also been reported from Singapore and, as alien species, from Brazil. Lastly, L. kuekenthali De Man, 1902 known from numerous localities in the Indo-West Pacific biogeographic area, is reported for the first time from Madagascar. Results of the present morphological and molecular analyses suggest that L. hochi Baeza & Anker, 2008 from the Caribbean Sea is a synonym of the Indo-West Pacific L. kuekenthali, and thus the latter species is alien in the western Atlantic.

scholarly journals Dacar Cas/Somali Red Aloe: a new species of Aloe (Asphodelaceae) from Somaliland

PhytoKeys ◽  
2019 ◽  
Vol 117 ◽  
pp. 85-97
Author(s):  
Mary E. Barkworth ◽  
Ahmed Ibrahim Awale ◽  
Faisal Jama Gelle
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Plant Diversity ◽  
Species Density ◽  
Number Of Species ◽  
The Indian Ocean ◽  
Eastern Highlands ◽  
A New Species

A new species of Aloe (Asphodelaceae) is described from Somaliland. It differs from other species in forming large clumps and in having sap that is initially yellow but quickly turns bright red and then dark red or reddish-brown, paniculate red-flowered inflorescences and uniformly coloured leaves with red teeth. Its recognition raises the number of species known from the combined area of Somaliland and Somalia s.s. from 31 to 36. A map portraying species density of Aloe by country, as that genus is now interpreted, shows that Aloe has its highest density on islands in the Indian Ocean but that, within Africa, the greatest density is in countries along the eastern highlands. The data also reinforce the importance of field botanists in determining a country’s known plant diversity.

scholarly journals A new species of the genus Smacigastes Ivanenko & Defaye, 2004 (Tegastidae, Harpacticoida, Copepoda) from the Onnuri Vent Field in the Indian Ocean

2020 ◽  
Vol 96 (2) ◽  
pp. 699-714
Author(s):  
Jong Guk Kim ◽  
Jimin Lee
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Hydrothermal Vent ◽  
Hydrothermal Vents ◽  
First Record ◽  
Cold Seeps ◽  
Dichotomous Key ◽  
The Family ◽  
The Indian Ocean ◽  
A New Species

The genus Smacigastes Ivanenko & Defaye, 2004 (Harpacticoida, Copepoda) is the most primitive genus in the family Tegastidae Sars, 1904, occurring in deep-sea chemosynthetic environments, such as hydrothermal vents, cold seeps, whale falls and wood falls. Our exploration of the Onnuri Vent Field, the sixth active hydrothermal vent system in the Central Indian Ridge, resulted in the discovery of a new species in the genus Smacigastes. A detailed morphological analysis of S. pumilasp. nov. reveals that it most resembles S. barti Gollner, Ivanenko & Martínez Arbizu, 2008, described from a hydrothermal vent in the East Pacific Ridge; the new species can be distinguished from the existing species by the 8-segmented female antennule, the absence of an abexopodal seta on the antennary basis, the mandibular exopod represented by a single seta and the exopod of the first leg with five setae. This is the first record of Smacigastes in the Indian Ocean. A dichotomous key to species of the genus Smacigastes worldwide is provided.

scholarly journals The genus Chaerilus Simon, 1877 (Scorpiones, Chaerilidae) in the Indian Ocean Islands and description of a new species

Euscorpius ◽  
2011 ◽  
Vol 2011 (110) ◽  
pp. 1-8
Author(s):  
Wilson R. Lourenço ◽  
◽  
Bernard Duhem ◽  
Elise-Anne Leguin ◽  
◽  
...  
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
The Indian Ocean ◽  
A New Species ◽  
Ocean Islands

A new thermosbaenacean of the genus Tethysbaena (Peracarida, Thermosbaenacea, Monodellidae) from Socotra Island, Yemen

Crustaceana ◽  
2021 ◽  
Vol 94 (4) ◽  
pp. 487-506
Author(s):  
H. P. Wagner ◽  
K. Van Damme
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Species Group ◽  
Isolated Populations ◽  
Dry Land ◽  
Tethys Sea ◽  
Socotra Island ◽  
Indian Ocean Island ◽  
Socotra Archipelago ◽  
A New Species

Abstract A new species of the thermosbaenacean genus Tethysbaena Wagner, 1994 (Crustacea: Peracarida: Thermosbaenacea) is described based on females from a freshwater cave lake and a brackish coastal well on Socotra Island (Yemen) as Tethysbaena dioscorida n. sp. It is the first representative of the Thermosbaenacea that is described from the Socotra Archipelago and the first member of the order known from an Indian Ocean island. The new species is the eighth known member of what is considered the “Tethysbaena relicta” species-group, which is known from Oman (four species), Somalia (one species), Israel (two species) and now Socotra Island (one species). The new species shows closest morphological affinities with T. barbatula Wagner, 2020 from Oman. We suggest that the speciation in this well-defined species-group is due to regressions of the Tethys Sea and the appearance of dry land since the Oligocene-Miocene boundary to the present time, forming major barriers and creating isolated populations of the ancestral species. Also the potential biocrisis in Socotra as a result of developmental activities during the last decades is mentioned, which may affect the subterranean faunas in particular in coastal areas, exemplified by the destruction of one of only two localities where the new species was found.

Passage Through the Strait of Bab Al-Mandeb

1978 ◽  
Vol 13 (2) ◽  
pp. 180-193
Author(s):  
Ruth Lapidoth
Keyword(s):  
Indian Ocean ◽  
Coral Reefs ◽  
Red Sea ◽  
Democratic Republic ◽  
Gulf Of Aden ◽  
Eastern Shore ◽  
The West ◽  
The Indian Ocean ◽  
The Republic ◽  
Yemen Arab Republic

The strait of Bab al-Mandeb, “the gate of tears” or “the gate of the wailing yard”, joins the high seas of the Gulf of Aden and the Indian Ocean to those of the Red Sea. The name is primarily used by geographers to designate the narrowest part of the passage, between Ras Bab al-Mandeb on the Asian shore and Ras Siyan in Africa. At this point it is bordered on the east by the Yemen Arab Republic (Northern Yemen) and the People's Democratic Republic of Yemen (Southern Yemen), and in the west by the Republic of Djibouti (formerly the French Territory of the Afars and Issas). About 14 miles farther north, where the Red Sea (or, for that matter, the strait) is nearly 20 miles wide, lies the coast of Ethiopia (the province of Eritrea). All the riparians claim a territorial sea of 12 miles, and the Yemen Arab Republic, as well as the People's Democratic Republic of Yemen, also claim jurisdiction for certain purposes in an additional zone of 6 miles.On the eastern shore of the strait of Bab al-Mandeb lies the peninsula of Ras Bab al-Mandeb, which is about 6–10 km. wide. It consists of rocky, volcanic plains with several hills of 200–300 m. The coast of Ras Bab al-Mandeb is surrounded by coral reefs of a width of up to 1500 m. The border between North Yemen and South Yemen passes down the middle of Ras Bab al-Mandeb.

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