Four new species of free-living marine nematodes of the family Desmodoridae (Nematoda: Desmodorida) and a redescription of Desmodora nini (Inglis, 1963) from the continental shelf off northeastern Brazil

Zootaxa ◽  
2015 ◽  
Vol 4021 (1) ◽  
pp. 63
Author(s):  
ALEXANDRE L. LARRAZÁBAL-FILHO ◽  
MARIA CRISTINA DA SILVA ◽  
ANDRÉ M. ESTEVES
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Northeastern Brazil ◽  
Marine Nematodes ◽  
Free Living ◽  
The Family

Two new species of free-living marine nematodes of the family Oxystominidae Chitwood, 1935 (Enoplida) with a review of the genus Thalassoalaimus de Man, 1893 from the Argentine coast 

Zootaxa ◽  
2017 ◽  
Vol 4250 (4) ◽  
pp. 347
Author(s):  
ANTONELA MARTELLI ◽  
VIRGINIA LO RUSSO ◽  
GABRIELA VILLARES ◽  
CATALINA T. PASTOR DE WARD
Keyword(s):  
New Species ◽  
San Antonio ◽  
Marine Nematodes ◽  
San Jose ◽  
Key To Species ◽  
Free Living ◽  
Rio Negro ◽  
The Family ◽  
Two New Species ◽  
De Man

Two new free-living marine nematodes of the family Oxystominidae are described from San Antonio Bay (Río Negro) and San José Gulf (Chubut). Litinium australis sp. n., is characterized by having a rounded tail, by the first and second crown of cephalic setae with different lengths, gubernaculum with apophysis and by the presence of at least four precloacal papillae; Thalassoalaimus nestori sp. n., is characterized by having a conical tail, cephalic setae equal in length, gubernaculum with rounded and dorso-caudally directed apophysis and two precloacal papillae. An emended diagnosis of the genus Thalassoalaimus and a key to species are given. 

Four new species and an identification key for Stygodesmodora Blome, 1982 (Nematoda: Spiriniinae) from the continental shelf off northeastern Brazil 

Zootaxa ◽  
2017 ◽  
Vol 4294 (1) ◽  
pp. 46
Author(s):  
ALEXANDRE L. LARRAZÁBAL-FILHO ◽  
PATRÍCIA F. NERES ◽  
ANDRÉ M. ESTEVES
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Continental Shelf ◽  
The Body ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Marine Nematodes ◽  
Undescribed Species ◽  
Potiguar Basin

Four previously undescribed species of marine nematodes were collected on the continental shelf of the Potiguar Basin in northeastern Brazil. Stygodesmodora amphidialis sp. n. has a large fovea amphidialis, long cephalic setae, globular spermatic cells, 6–8 tubular supplements and button-like caudal papillae. Stygodesmodora paramphidialis sp. n. is similar but can be differentiated by the presence of a bipartite lumen and a fovea amphidialis smaller than in S. amphidialis sp. n. Stygodesmodora robusta sp. n. has a relatively robust body, strongly annulated cuticle, one large dorsal tooth and a small ventral tooth, one row of nine ventrally placed precloacal setae, and arched spicules. Stygodesmodora potiguensis sp. n. has the cuticle strongly annulated, many setae along the body, supplements absent, and sexual dimorphism in the size of the fovea amphidialis. These four new species increase to seven the number of taxa known in the genus. 

scholarly journals New species ofEpacanthion(Nematoda: Thoracostomopsidae) from Patagonia coast, Río Negro and Chubut, Argentina

2012 ◽  
Vol 93 (4) ◽  
pp. 925-934 ◽  
Author(s):  
V. Lo Russo ◽  
G. Villares ◽  
A. Martelli ◽  
C.T. Pastor de Ward ◽  
C. Harguinteguy
Keyword(s):  
New Species ◽  
Coastal Areas ◽  
The Body ◽  
Cervical Region ◽  
Marine Nematodes ◽  
Free Living ◽  
Rio Negro ◽  
Body Diameter ◽  
The Family ◽  
Short Spicule

Two new free-living marine nematodes belonging to the family Thoracostomopsidae, subfamily Enoplolaiminae and the generaEpacanthionare described from Patagonian coastal areas, Río Negro and Chubut provinces of Argentina. InEpacanthion bicuspidatumsp. nov. the main features are: two cusps on distal mandible end; presence of two rings of eight setae in the cervical region; and eight crown-shaped setae along the body, presence of one supplement distant two cloacal body diameter (cbd) from cloacae, gubernaculum and short spicule.Epacanthion ampullatumsp. nov. is characterized by having a tubular and long pre-cloacal supplement, short spicule, presence of gubernaculum, presence of three long setae on the tip of the tail, the presence of one supplement distant three cbd from cloacae and the presence of two small cusps on the distal end of the mandible.

Two new species of Opheliidae (Annelida: Polychaeta): Euzonus papillatus sp. n. from a northeastern Brazilian sandy beach and Euzonus mammillatus sp. n. from the continental shelf of southeastern Brazil

Zootaxa ◽  
2004 ◽  
Vol 478 (1) ◽  
pp. 1 ◽  
Author(s):  
CINTHYA S.G. SANTOS ◽  
EDMUNDO F. NONATO ◽  
MARY E. PETERSEN
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Sandy Beach ◽  
Northeastern Brazil ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
Original Material ◽  
The Family ◽  
Two New Species ◽  
The Status

Two new species of Euzonus from the Brazilian coast are described and figured. Both differ from other species of the genus with bifid branchiae in having a dorsoventrally oriented patch or band of papillae dorsal to the notopodia of chaetiger 10. Euzonus papillatus sp. n., from beaches of north and northeastern Brazil, has 20 pairs of branchiae, an oval patch with 3 rows of papillae, and posterior noto-/neuropodia with 5 6 modified spines of a type not previously reported for the family, possibly because the modifications are very delicate and may have been overlooked. Euzonus mammillatus sp. n., from southeastern Brazil, has 18 pairs of branchiae, a band with 2 rows of papillae and no modified spines. Based on information from J. M. Orensanz, the 1974 report of E. furciferus in southeastern Brazil is questioned. The original material could not be located and this record plus a more recent one need to be reconfirmed. Described species of Euzonus and the similar Lobochesis Hutchings & Murray, 1984 are briefly reviewed and the status of the two genera is discussed. We find that the supposed differences are not present and suggest that Lobochesis be considered a junior synonym of Euzonus.

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.

A new genus with three new species of free-living marine nematodes of the subfamily Desmodorinae (Nematoda: Desmodoridae), from the continental shelf off northeastern Brazil

Zootaxa ◽  
2019 ◽  
Vol 4615 (2) ◽  
pp. 321
Author(s):  
ALEXANDRE L. LARRAZÁBAL-FILHO ◽  
PATRÍCIA F. NERES ◽  
MARIA CRISTINA DA SILVA ◽  
ANDRÉ M. ESTEVES
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
New Genus ◽  
Head Capsule ◽  
Northeastern Brazil ◽  
Dorsal Spine ◽  
Entire Body ◽  
Marine Nematodes ◽  
Cuticular Ornamentation ◽  
Three New Species

Three new species representing a new genus of marine nematodes were collected on the continental shelf of the Potiguar Basin, northeastern Brazil. Spinonema gen. n. has a coarsely annulated cuticle with the inner layer ornamented with vacuoles, and lateral alae. The lateral alae are formed by raised and bent lateral sections of annules, resembling the letter C. C-shaped refers to each individual segment of ala. Some species have a dorsal spine, arched spicules and a well-developed head capsule, with a thick cuticle without annulations. Spinonema gen. n. has some features in common with certain genera of the family Desmodoridae but can be distinguished by the coarse body annuli, cuticular ornamentation (lateral alae, and in some species a dorsal spine) and the absence of subcephalic setae. The type species of the new genus, Spinonema cuticulatum gen. et sp. n., is characterized by the presence of a spiral fovea amphidialis, hook-shaped spicules in the capitulum, a velum and three ejaculatory glands. Spinonema spirale gen. et sp. n. has body annuli with the inner cuticle ornamented with vacuoles along the entire body, a multispiral fovea amphidialis with 3.15 turns and a gubernaculum intricate, with lateral crurae. Dorsal apophysis of gubernaculum wing-shaped. Spinonema absente gen. et sp. n. has a cryptospiral fovea amphidialis, short spicules, a simple gubernaculum and three precloacal setae. 

scholarly journals A new species of Characidium (Characiformes: Crenuchidae) from small coastal drainages in northeastern Brazil, with remarks on the pseudotympanum of some species of the genus

2014 ◽  
Vol 12 (2) ◽  
pp. 333-342 ◽  
Author(s):  
Angela M. Zanata ◽  
Priscila Camelier
Keyword(s):  
New Species ◽  
Lateral Line ◽  
The Body ◽  
Northeastern Brazil ◽  
Horizontal Scale ◽  
Caudal Peduncle ◽  
Transversal Line ◽  
Lateral Band ◽  
The Family ◽  
A New Species

Characidium samurai, a species of the family Crenuchidae apparently endemic to rio das Almas and rio Vermelho basins, Bahia, Brazil, is described. The new species is readily distinguishable from its congeners, except C. lanei, by having a dark lateral band along the head and body that is particularly broad from the rear of the head to the end of the caudal peduncle (1.5 or 2 scales wide) and by the absence of dark bars or blotches on the ventral half of the body. Characidium samurai differs from C. laneiby having the lateral band with straight borders overall (vs.lateral band with somewhat irregular borders due to blotches extending dorsally or ventrally), anal fin ii,7-8 (vs. ii,6), and 4 horizontal scale rows above the lateral line and 4 below (vs. 5/3). It further differs from congeners by a series of features, including isthmus completely covered by scales, lateral line complete with 34-37 perforated scales, 9 scales on the transversal line, 14 scale rows around the caudal peduncle, anal fin ii,7-8, and the absence of dark bars or spots on the fins, except by a faded dorsal-fin bar. The presence of pseudotympanum in four species of Characidium is discussed.

Nephtyidae (Polychaeta) from the Gulf of California (Mexican Pacific) with the description of two new species of Aglaophamus

2008 ◽  
Vol 89 (4) ◽  
pp. 697-710 ◽  
Author(s):  
J. Pérez-Torrijos ◽  
P. Hernández-Alcántara ◽  
V. Solís-Weiss
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Gulf Of California ◽  
Mexican Pacific ◽  
Taxonomic Key ◽  
The Family ◽  
Two New Species

The aim of this study is to analyse the Nephtyidae from the Gulf of California. Previous studies about the family Nephtyidae from the continental shelf of the Gulf include 21 species of which seven have been synonymized by several authors, so that at present only 14 species are recognized. In this study, 1763 specimens of Nephtyidae from the continental shelf of the Gulf of California were examined. Eight species were identified, from which Aglaophamus longicirrata sp. nov. and Aglaophamus foliosa sp. nov. are newly described. Aglaophamus longicirrata sp. nov. is characterized by the presence of very long dorsal cirri in median parapodia and by having 16 rows of subterminal papillae with 3–7 papillae per row, and a pair of middorsal papillae on the proboscis. Aglaophamus foliosa sp. nov. is characterized by foliaceous long dorsal cirri; the proboscis bears 16 rows of subterminal papillae and an irregular number of papillae per row, from 5 to 15. A taxonomic key is presented for the species of Nephtyidae recorded from the continental shelf of the Gulf of California, including the two new species of Aglaophamus.

Description of Pseudosteineria longisetis sp. n. from northeastern Brazil with a review of the genus Pseudosteineria Wieser, 1956 (Nematoda: Xyalidae)

Zootaxa ◽  
2020 ◽  
Vol 4763 (3) ◽  
pp. 354-370
Author(s):  
GABRIEL CIDREIRA ◽  
VIRÁG VENEKEY ◽  
ORANE F. DE SOUZA ALVES ◽  
FRANCISCO KELMO
Keyword(s):  
The Body ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Marine Nematode ◽  
Free Living ◽  
The Family ◽  
Emended Diagnosis

A new free-living marine nematode of the family Xyalidae is described from Armação Beach, northeastern Brazil, and the genus Pseudosteineria is reviewed. Pseudosteineria longisetis sp. n. is characterized by having six groups of long subcephalic setae, amphids situated slightly anterior to the groups of subcephalic setae or at the level of the first subcephalic setae, long somatic setae located posteriorly to subcephalic setae and distributed along the body, one papiliform precloacal supplement, and gubernaculum with dorso-caudal apophysis. An emended diagnosis of the genus, an updated list of species and dichotomous identification key, and a pictorial key are given. A comparative table including the main characters of all Pseudosteineria species is also provided. 

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