scholarly journals Three new species of free-living nematodes from the South-East Atlantic Abyss (DIVA I Expedition)

Zootaxa ◽  
2008 ◽  
Vol 1866 (1) ◽  
pp. 151 ◽  
Author(s):  
ALEXEI V. TCHESUNOV
Keyword(s):  
Tail Length ◽  
Nematode Species ◽  
Valid Species ◽  
Relative Width ◽  
East Atlantic ◽  
Free Living ◽  
As Species ◽  
Three New Species ◽  
Amphidial Fovea ◽  
Species Inquirendae

Three new nematode species were found in the Angola Basin (south-east Atlantic Ocean) at depths of about 5500 m. Paracyatholaimus diva sp. nov. (Cyatholaimidae) is characterised by outer labial and cephalic setae of about 3–5 μm, multispiral amphidial fovea with six turns in males and four turns in females situated at the level of the dorsal tooth, buccal cavity armoured with only one prominent dorsal tooth, tail consisting of anterior conical and posterior slender cylindrical half portions, and six preanal midventral setose supplementary organs. Paracyatholaimus diva sp. nov. is most similar to Paracyatholaimus rotundus Gerlach, 1964 but differs by slightly longer body (936–1176 μm versus 705 μm), tail shape (with clearly narrowed posterior half versus conical), six versus four supplementary organs of different shape. The genus Paracyatholaimus Micoletzky, 1923 is briefly reviewed. The genus now includes twenty-four valid species. Five species are considered as species inquirendae, mainly because of inadequate type material lacking adult stages and/or incomplete descriptions. A pictorial guide for identification of the valid species of Paracyatholaimus is provided. Pomponema proximamphidum sp. nov. shares subapical position of the amphidial fovea and distinct lateral differentiation of the somatic cuticle with five Pomponema species: P. concinnum Wieser, 1954, P. corniculata Gourbault, 1980, P. mirabile Cobb, 1917, P. multipapillatum Filipjev, 1922 and P. stomachor Wieser, 1954 but differs from them by tail length, longer posterior cylindrical portion of the tail, relative width of the amphidial fovea, position of the ventral pore and lesser number of supplementary organs. Desmodora striatocephala sp. nov. is well characterized by a combination of very large amphidial fovea occupying nearly the entire lateral surface of the cephalic capsule and thickened midventral preanal cuticle with a few supplementary papillae inserted therein in males. D. striatocephala sp. nov. differs from related species D. cuddlesae Inglis, 1963 and to some lesser degree with D. inflexa Wieser, 1954 with shorter body, relative tail length, bigger size of the amphidial fovea and lesser number of supplementary papillae.

Free-living nematodes of the genus Syringolaimus de Man, 1888 (Nematoda, Enoplida, Ironidae) from the Angola Basin, South-East Atlantic Abyss

Zootaxa ◽  
2017 ◽  
Vol 4306 (4) ◽  
pp. 478 ◽  
Author(s):  
ALEXEI V. TCHESUNOV
Keyword(s):  
Buccal Cavity ◽  
Nematode Species ◽  
Brazilian Coast ◽  
East Atlantic ◽  
Free Living ◽  
Pharyngeal Bulb ◽  
Annotated List ◽  
As Species ◽  
De Man ◽  
Species Inquirendae

Three nematode species of the genus Syringolaimus (Enoplida, Ironidae) were found in the Angola Basin (south-east Atlantic Ocean) at depths of almost 5500 m. One of them is described as new for science and the other two were initially recorded from the deep sea off the Brazilian coast and are redescribed here. Syringolaimus elegans sp. n. differs from all other species of Syringolaimus by a slimmer body (a=99 vs. 30–73) and from all species except S. ingens (nom. nud.) by its greater body length (2718 μm vs. 760–1750 μm), longer buccal cavity (79 μm vs. 28–58 μm), and longer terminal pharyngeal bulb (70 μm vs. 53 μm). All the Syringolaimus species together make up from 0.75 to 2.82% of all nematode individuals from all samples. Diagnoses of Syringolaimus annae Lima et al., 2009 and S. smolae Lima et al., 2009 are updated. An annotated list of Syringolaimus species is provided; the species annae, elegans, filicaudatus, loofi, magdae, renaudae, smolae, striatocaudatus and taniae are considered as valid, while brevicaudatus, caspersi, lichenii, marisalbi, smarigdus and venustus as species inquirendae, and gladiatus, ingens, nitidus and venustus as nomina nuda. Diagnostic characters and problems of species identification are discussed. 

scholarly journals Two New Marine Free-Living Nematodes from Jeju Island Together with a Review of the Genus Gammanema Cobb 1920 (Nematoda, Chromadorida, Selachinematidae)

Diversity ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 19 ◽  
Author(s):  
Alexei Tchesunov ◽  
Raehyuk Jeong ◽  
Wonchoel Lee
Keyword(s):  
South Korea ◽  
Nematode Species ◽  
Jeju Island ◽  
Valid Species ◽  
Free Living ◽  
Annotated List ◽  
Size Number ◽  
The Family ◽  
Sandy Sediments ◽  
Species Inquirendae

In the context of exploration of meiofauna in a sandy intertidal zone of Jeju Island (South Korea), over 70 nematode species are identified, some which have been proven to be new for science. Two new free-living marine nematode species of the family Selachinematidae (Chromadorida, Selachinematidae, Choniolaiminae) are described from the intertidal sandy sediments of Jeju Island (South Korea). Gammanema okhlopkovi sp. n. is closest to Gammanema anthostoma (Okhlopkov, 2002) and differs by having longer cephalic setae (8.5–19 μm in G. okhlopkovi versus 6–7.5 μm in G. anthostoma) and by the presence of precloacal supplementary organs. The genus diagnosis of Gammanema is updated. The genus includes fourteen valid species, while three species are considered species inquirendae due to incomplete diagnoses and illustrations impeding their correct recognition. An annotated list of valid and invalid Gammanema species is provided. A pictorial key for valid Gammanema species is constructed, which consists of two components: (1) simplified images of heads, and (2) a table summarizing most of the significant measured and numeric characters between species. Latronema obscuramphis sp. n. differs from its related species Latronema aberrans (Allgén 1934), Latronema annulatum (Gerlach, 1953), and Latronema spinosum (Andrássy, 1973) by body size, number of supplementary organs, tail shape, length of spicules, and cuticle ornamentation.

Four new species of free-living marine nematodes of the family Comesomatidae (Nematoda: Araeolaimida) from coast of Vietnam

Zootaxa ◽  
2013 ◽  
Vol 3608 (7) ◽  
pp. 547-560 ◽  
Author(s):  
VLADIMIR G. GAGARIN
Keyword(s):  
New Species ◽  
Littoral Zone ◽  
Nematode Species ◽  
Valid Species ◽  
Marine Nematodes ◽  
Free Living ◽  
The Family ◽  
Coast Of Vietnam ◽  
Amphidial Fovea

Specimens of four new nematode species of the family Comesomatidae were isolated from the sediments of littoral zone of South China Sea at the coast of Vietnam and described and illustrated. Sabatieria curvispiculata sp. n. is characterized by the long and slender tail, short cephalic setae and strongly curved spicules in males. Setosabatiera orientalis sp. n. is close to S. australis Riera, Nunez, Brito, 2006, but differs from it in the comparatively shorter and more slender tail, small-er number of amphidial fovea turns, greater number of precloacal supplements in males and shape and structure of spic-ules. Dorylaimopsis intermedia sp. n. is morphologically closest to D. mediterranea Grimaldi-de Zio, 1968 and D. magellanense Chen, Vincx, 1968, but differs from both species in the longer outer labial setae and absence of precloacal supplements in males. D. brevispiculata sp. n. is similar to D. turneri Zhang, 1992 and D. coomansi Muthumbi, Soetaert, Vincx, 1977, but differs from both species in the shape of outer labial sensillae and absence of precloacal supplements in males. A pictorial key for determination of valid species in the genus Setosabatieria Rouville, 1903 is given.

Paronchocerca struthionus n.sp. (Nematoda: Filarioidea) from ostriches (Struthio camelus), with a redescription of Paronchocerca ciconiarum Peters, 1936 and a review of the genus

1986 ◽  
Vol 64 (11) ◽  
pp. 2480-2491 ◽  
Author(s):  
Cheryl M. Bartlett ◽  
Roy C. Anderson
Keyword(s):  
Pulmonary Arteries ◽  
Valid Species ◽  
Single Family ◽  
Glandular Oesophagus ◽  
Struthio Camelus ◽  
Incertae Sedis ◽  
As Species ◽  
The Right ◽  
Species Inquirendae ◽  
Adaptive Zone

Paronchocerca struthionus n.sp. (Onchocercidae: Splendidofilariinae) from the lungs of Struthio camelus L. (Struthionidae) from West Africa has a long, sacculate glandular oesophagus similar to that of Paronchocerca limboonkengi (Hoeppli and Hsü, 1929) n.comb. (= Lemdana limboonkengi), P. bambusicolae, P. tonkinensis, and P. sonini. It can be distinguished by delicate annular cuticular thickenings and, in the male, a preanal hypodermal swelling, three pairs of circumanal papillae, and the length of the right spicule in relation to the length of the tail. Also, lateral, postanal papillae are absent, although inconspicuous subterminal papillae are present. Paronchocerca ciconiarum Peters, 1936, the type species, is redescribed on the basis of material from the pulmonary arteries of Leptoptilus crumeniferus (Lesson) (Ciconiidae) from Uganda. Seventeen valid species are recognized in the genus. Paronchocerca sanguinisardeae, P. choprai, and P. badamii are regarded as species inquirendae and P. alii, as a species incertae sedis. Among larger avian filarioid genera, Paronchocerca appears unique in that each species seems restricted to a single family of birds. Paronchocerca may have become established in early Ornithurae and subsequently persisted in some of the "primitive" birds, as well as having transferred to "modern" groups which now occupy the aquatic adaptive zone originally occupied by the earliest Ornithurae. Paronchocerca apparently has been largely unsuccessful in transferring to other modern groups.

A revision of Gasteruption Latreille (Hymenoptera: Gasteruptiidae) in the Neotropical Region

Zootaxa ◽  
2011 ◽  
Vol 3030 (1) ◽  
pp. 1 ◽  
Author(s):  
ANTONIO CARLOS CRUZ MACEDO
Keyword(s):  
Neotropical Region ◽  
Valid Species ◽  
Neotropical Species ◽  
As Species ◽  
Species Inquirendae

The Neotropical species of Gasteruption Latreille are revised, described, diagnosed, and illustrated; a key for females is provided. Twenty six valid species are recognized, thirteen of which are described as new: G. amputatum Townes, G. barnstoni (Westwood), G. bertae n. sp., G. bispinosum Kieffer, G. brachychaetum Schrottky, G. brandaoi n. sp., G. brasiliense (Blanchard), G. floridanum (Bradley), G. glauciae n. sp., G. guildingi (Westwood), G. hansoni n. sp., G. helenae n. sp., G. huberi n. sp., G. kaweahense (Bradley), G. lianae n. sp., G. loiaconoae n. sp., G. masneri n. sp., G. oliveirai n. sp., G. parvum Schrottky, G. rafaeli n. sp., G. sartor Schletterer, G. smithi n. sp., G. tenue Kieffer, G. townesi (Alayo), G. visaliae (Bradley), and G. wahli n. sp. The following new synonymies are proposed: G. maculicorne Cameron, G. macroderum Schletterer, and G. zapotecum Schletterer with G. barnstoni; G. bihamatum Kieffer, G. fallens Kieffer, G. fiebrigi Schrottky, G. leptodomum Kieffer, G. montivagum Kieffer, and G. strandi Kieffer with G. bispinosum; G. annulitarse Schrottky, G. brasiliae Kieffer, G. gracillimum (Schletterer), G. longicauda Kieffer, G. petroselini Schrottky, G. subtropicale Schrottky and G. torridum (Bradley) with G. brasiliense; G. rufipectus (Westwood) with G. guildingi; G. angustatum (Kieffer) with G. kaweahense; G. horni Brèthes with G. parvum. The following taxa are considered as species inquirendae: G. albitarse Schletterer, G. austini Jennings and Smith, G. subcoriaceum Kieffer n. stat., and G. tenuicolle Schletterer. As well, G rubrum Taschenberg is synonymized with Pseudofoenus infumatus (Schletterer). In addition, G. tenue Pasteels, 1957a from Australia is a junior homonym of G. tenue Kieffer, 1922 and is renamed G. pasteelsi n. name.

State of the art of the free-living marine Monhysteridae (Nematoda)

2008 ◽  
Vol 88 (7) ◽  
pp. 1371-1390 ◽  
Author(s):  
Gustavo Fonseca ◽  
Wilfrida Decraemer
Keyword(s):  
Marine Sediments ◽  
State Of The Art ◽  
Marine Species ◽  
Historical Background ◽  
Valid Species ◽  
Free Living ◽  
The Family ◽  
Taxonomic History ◽  
Taxonomic Problem ◽  
Species Inquirendae

The family Monhysteridae is characterized by 17 valid genera, seven of which are known to be free-living, inhabiting marine sediments. In total, 70 valid marine species are ascribed to these seven genera. Overall, the family is characterized by a confused taxonomic history with a large list of synonyms and species inquirendae. The taxonomic problem is not restricted to the old literature, but inconsistencies also appeared in recent studies. The aim of this study is to show the most important diagnostic characters to identify each genus and provide taxonomic tools for species identification. Dichotomous-keys and illustration-guides are attempted for the marine monhysterid species. For the family and each subfamily, tribe and marine genus a brief historical background, diagnosis and a list of valid species is provided. Hereby, we propose to transfer eight species of the genus Thalassomonhystera to the genus Monhystrella.

scholarly journals Revision of the southern Andean genus Sadocus Sørensen, 1886 (Opiliones, Gonyleptidae, Pachylinae)

ZooKeys ◽  
2021 ◽  
Vol 1025 ◽  
pp. 91-137
Author(s):  
Marília Pessoa-Silva ◽  
Marcos Ryotaro Hara ◽  
Ricardo Pinto-da-Rocha
Keyword(s):  
Cladistic Analysis ◽  
Morphological Characters ◽  
Junior Synonym ◽  
Valid Species ◽  
Nominal Species ◽  
New Classification ◽  
As Species ◽  
First Time ◽  
Species Inquirendae

Species of the genus Sadocus Sørensen, 1886 are conspicuous gonyleptids that occur in Chile and Argentina. Here, the genus is revised for the first time and the cladistic analysis based on morphological characters does not corroborate its monophyly unless a phylogenetically unrelated species is excluded (explained further on). A new classification is proposed for the seven species left in the genus and considered valid, of the 13 nominal species previously recognized. Two out of the seven valid species are considered as species inquirendae: Sadocus allermayeri (Mello-Leitão, 1945) [= Carampangue allermayeri Mello-Leitão, 1945] and Sadocus nigronotatus (Mello-Leitão, 1943) [= Carampangue nigronotatum Mello-Leitão, 1943]. The following synonymies are proposed: Sadocus bicornis (Gervais, 1849) [original combination = Gonyleptes bicornis Gervais, 1849] is a junior synonym of Sadocus asperatus (Gervais, 1847) [= Gonyleptes asperatus Gervais, 1847]; Sadocus conspicillatus Roewer, 1913, Sadocus exceptionalis (Mello-Leitão, 1946) [= Araucanoleptes exceptionalis Mello-Leitão, 1946] and Sadocus guttatus Sørensen, 1902 are junior synonyms of the valid name Sadocus polyacanthus (Gervais, 1847) [= Gonyleptes polyacanthus Gervais, 1847]; and Sadocus calcar (Roewer, 1913) [= Lycomedes calcar Roewer, 1913] is a junior synonym of the valid name Gonyleptes horridus Kirby, 1819. Sadocus brasiliensis Soares & Soares, 1949 is not congeneric with Argentinean/Chilean species of the genus according to the cladistic analysis and is here synonymized with Discocyrtus catharinensis (Mello-Leitão, 1923 [= Sadocus catharinensis Mello-Leitão, 1923]).

Three new species of the free-living marine nematode Metoncholaimus Filipjev, 1918 (Enoplida, Oncholaimidae) from Argentinean coasts

Zootaxa ◽  
2019 ◽  
Vol 4688 (1) ◽  
pp. 86-100
Author(s):  
VIRGINIA LO RUSSO ◽  
CATALINA T. PASTOR DE WARD
Keyword(s):  
New Species ◽  
Large Body ◽  
Valid Species ◽  
Marine Nematodes ◽  
Marine Nematode ◽  
Large Body Size ◽  
Free Living ◽  
System A ◽  
Rio Negro ◽  
Three New Species

Three new species of free-living marine nematodes of the genus Metoncholaimus are described from San Matías gulf (Río Negro, Argentina). Metoncholaimus sanmatiensis sp. n. is characterized by large body size, long spicules, small gubernaculum, presence of long setose pre- and postcloacal genital sensilla and presence of precloacal pores. Metoncholaimus perdisus sp. n. is characterized by small-sized body, short spicules, small gubernaculum, presence of long setose pre- and postcloacal genital sensilla and presence of pre- and postcloacal pores. Metoncholaimus paracavatus sp. n. is closely related to Oncholaimus cavatus but can be considered as a new Metoncholaimus species based on the presence of gubernaculum and the morphology of the demanian system. A compendium of all valid species, including new species, is given. 

scholarly journals Subulura mackoi n. sp. (Nematoda: Subuluridae) and the zoogeography of subulurids parasitizing birds

2013 ◽  
Vol 50 (1) ◽  
pp. 46-56 ◽  
Author(s):  
V. Baruš ◽  
Š. Mašová ◽  
B. Koubková ◽  
J. Sitko
Keyword(s):  
Anterior Extremity ◽  
Tail Length ◽  
Nematode Species ◽  
Host Specialization ◽  
Valid Species ◽  
Upper Lip ◽  
The Czech Republic ◽  
Host Interactions ◽  
High Species Diversity ◽  
Distinguishing Features

AbstractA new nematode species, Subulura mackoi n. sp., is described based on specimens from the colon and caecum of the Eurasian Scops Owl Otus scops (L.) (Aves: Strigiformes) from the Czech Republic, collected in 2011. Males are characterized by 10 pairs of caudal papillae, a single papilla on the upper lip of the cloaca, and small unequal spiculae; female distinguishing features are body length, distance of the vulva from the anterior extremity, tail length, and egg dimension.Analysis of the zoogeographical distribution and host specialization (in the bird orders) of 68 valid species from the genus Subulura Molin, 1860 shows significantly high species diversity in the tropical zones. Only one species, S. brumpti, is a cosmopolitan parasite of Gallus gallus f. domestica and other domesticated gallinaceous birds. Zoogeographical-host interactions may be utilized to support the identification of morphospecies of the genus Subulura.

scholarly journals Two new free-living nematode species (Trefusiina: Trefusiidae) from the Chatham Rise crest, Southwest Pacific Ocean

2013 ◽  
Author(s):  
Daniel Leduc
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Water Depth ◽  
Nematode Species ◽  
Valid Species ◽  
Free Living ◽  
Southwest Pacific ◽  
The Family ◽  
Two New Species ◽  
Free Living Nematode

Two new species of the family Trefusiidae, viz., Trefusia piperata sp. nov. and Trefusialaimus idrisi sp. nov., are described from the crest of the Chatham Rise, Southwest Pacific Ocean (350 m water depth). The present study provides the first species records for this family in the region. Trefusia and Trefusialaimus comprise twenty and three valid species, respectively. A key to males of Trefusia is provided.

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