The deep-sea nematode Thalassomonhystera bathislandica sp. nov. and microhabitats of nematodes in flocculent surface sediments

1995 ◽  
Vol 75 (3) ◽  
pp. 715-724 ◽  
Author(s):  
F. Riemann
Keyword(s):  
New Species ◽  
Bottom Sediments ◽  
Deep Sea ◽  
Surface Sediments ◽  
Nematode Species ◽  
Physical Constraints ◽  
The North ◽  
North Eastern

Thalassomonhystera bathislandica sp. nov. (Nematoda: Monhysteridae) was found in abundance in a few gelatinous phytodetritus aggregates collected from the surface of bottom sediments in the north-eastern Atlantic at depths of about 4000 m. The new species resembles T. islandica (De Coninck, 1943), an inhabitant of saltmarshes. Viscous detrital aggregates, including sediment agglutinations made by the nematodes themselves, are perceived as the preferred habitats of nematode species in fluffy surficial muds. It is suggested that physical constraints prevent nematodes from a fast invasion into freshly sedimented, loose detritus deposits.

The Size Structure of Deep-Sea Meiobenthos in the North-Eastern Atlantic: Nematode Size Spectra in Relation to Environmental Variables

1996 ◽  
Vol 76 (2) ◽  
pp. 327-344 ◽  
Author(s):  
T. Soltwedel ◽  
O. Pfannkuche ◽  
H. Thiel
Keyword(s):  
Deep Sea ◽  
Environmental Variables ◽  
Size Structure ◽  
Nematode Species ◽  
Energy Availability ◽  
Size Spectra ◽  
Sea Floor ◽  
The North ◽  
North Eastern ◽  
One Year

The size distribution of benthic nematodes was investigated along different gradients of food availability in various regions of the north-eastern Atlantic: I, across the continental margin and II, with increasing distance from the continental rise. An overall trend for miniaturization with increasing distance from the food source was found. Moreover, our results indicate that seasonally varying food supply or a periodically pulsed input of organic matter to the sea floor affects nematode size spectra. The hypothesis is proposed that the life cycle of deep-sea nematode species and hence the size structure of their populations are related to seasonal energy availability. This dependence might result in one year life spans of deep-sea nematodes and probably other meiofauna.

scholarly journals Ashinkailepas kermadecensis, a new species of deep-sea scalpelliform barnacle (Thoracica: Eolepadidae) from the Kermadec Islands, southwest Pacific

Zootaxa ◽  
2009 ◽  
Vol 2021 (1) ◽  
pp. 57-65 ◽  
Author(s):  
JOHN S. BUCKERIDGE
Keyword(s):  
New Species ◽  
New Zealand ◽  
Deep Sea ◽  
Cold Water ◽  
The Other ◽  
Cold Seeps ◽  
Central Japan ◽  
Southwest Pacific ◽  
The North ◽  
A New Species

A new deep-sea stalked barnacle, Ashinkailepas kermadecensis sp. nov. has been recovered from a cold-water seep at depths of 1165 metres in the vicinity of the Kermadec Ridge to the northeast of the North Island, New Zealand. There are now two species of Ashinkailepas—the other, Ashinkailepas seepiophila Yamaguchi, Newman & Hashimoto, 2004, occurs in deep, cold seeps off central Japan. As there are two species within Ashinkailepas, formal diagnoses are provided for both taxa.

scholarly journals Encephalartos verrucosus (Zamiaceae): a new species from the north-eastern Transvaal

1988 ◽  
Vol 54 (5) ◽  
pp. 487-490 ◽  
Author(s):  
P.J. Robbertse ◽  
Suzelle van der Westhuizen ◽  
P. Vorster
Keyword(s):  
New Species ◽  
The North ◽  
North Eastern ◽  
A New Species

Cryptic speciation in the herbaceous bamboo genus Piresia (Poaceae, Olyreae)

2019 ◽  
Author(s):  
Maria L Silveira de Carvalho ◽  
Izabela S D de Jesus ◽  
Rilquer M da Silva ◽  
Kelly R B Leite ◽  
Alessandra S Schnadelbach ◽  
...  
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Leaf Surface ◽  
Conservation Status ◽  
Integrative Approach ◽  
Niche Modelling ◽  
The North ◽  
Abaxial Leaf Surface ◽  
Herbaceous Bamboos ◽  
North Eastern

Abstract Piresia, a small genus of herbaceous bamboos, has a geographical disjunction between the Caribbean and northern/western South America and the north-eastern Atlantic Forest in Brazil. Piresia leptophylla is reported from western Amazonia (WA) and the north-eastern Atlantic Forest (NAF), but its occurrence in western Amazonia is questionable. Using an integrative approach, we combined traditional morphological analysis, anatomy and niche modelling. The results revealed few macromorphological differences between WA and NAF specimens (only plant height, leaf length, lodicule dimensions, shape and position), contrasting with consistent differences in leaf anatomy (macrohairs and cruciform silica bodies in the costal zone of the adaxial/abaxial leaf surfaces, crenate silica bodies on the abaxial leaf surface, lack of panicoid hairs on the abaxial leaf surface, bicellular microhairs and lobed papillae over the abaxial leaf surface, and sparse but elongated fusoid cells in the mesophyll of WA specimens) and in niche patterns. The anatomical/micromorphological characters suggest environmental adaptations to the Amazonian and ‘restinga’ forests, respectively. We therefore propose the segregation of the WA populations into a new species, Piresia tenella sp. nov. We provide a formal description, photographs, a line illustration, a distribution map and discussion of the conservation status for the new species.

The genus Dolichopoda in Greece. A description of new species from the Ionian Regions and Peloponnisos (Orthoptera, Rhaphidophoridae)

Zootaxa ◽  
2008 ◽  
Vol 1923 (1) ◽  
pp. 1-17 ◽  
Author(s):  
MAURO RAMPINI ◽  
CLAUDIO DI RUSSO ◽  
FRANCESCA PAVESI ◽  
MARINA COBOLLI
Keyword(s):  
New Species ◽  
Central Area ◽  
The Other ◽  
The North ◽  
North Eastern ◽  
Western Greece ◽  
High Diversity

Description of five new Dolichopoda species from the Ionian area of Western Greece together with a description of the female for D. pavesii from Kefalonia island and the male of D. dalensi from North-eastern Peloponnisos are reported. Considering the other 6 species already documented in the area (including the North of the Peloponnisos), there is now a total of 11 recorded species of Dolichopoda which currently inhabit the underground areas of this zone. These new data, therefore, help better define the already high diversity of the genus in the Hellenic region (25 species in all) reinforcing the hypothesis that there was a central area of dispersion of the Dolichopoda in the ancient Aegean plate.

scholarly journals Molecular circumscription of new species of Gyrocotyle Diesing, 1850 (Cestoda) from deep-sea chimaeriform holocephalans in the North Atlantic

2020 ◽  
Vol 97 (3) ◽  
pp. 285-296
Author(s):  
Rodney A. Bray ◽  
Andrea Waeschenbach ◽  
D. Timothy J. Littlewood ◽  
Odd Halvorsen ◽  
Peter D. Olson
Keyword(s):  
New Species ◽  
North Atlantic ◽  
Deep Sea ◽  
The North ◽  
The North Atlantic

scholarly journals A review of the genus Iridogorgia (Octocorallia: Chrysogorgiidae) and its relatives, chiefly from the North Atlantic Ocean

2007 ◽  
Vol 87 (2) ◽  
pp. 393-402 ◽  
Author(s):  
Les Watling
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
New England ◽  
North Atlantic ◽  
Deep Sea ◽  
New Genus ◽  
Growth Form ◽  
North Atlantic Ocean ◽  
The North ◽  
The North Atlantic

Exploration of the New England and Corner Rise Seamounts produced four new species of chrysogorgiid octocorals with the spiral iridogorgiid growth form. Three species are described as new in the genus Iridogorgia and one is described in the new genus Rhodaniridogorgia. Both genera have representatives in the Atlantic and Pacific Oceans. Iridogorgia magnispiralis sp. nov., is one of the largest octocorals encountered in the deep sea and seems to be widespread in the Atlantic.

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