Dawestrema cycloancistrium (Monogenea) from the head pores of arapaimas

2017 ◽  
Vol 125 (2) ◽  
pp. 93-100 ◽  
Author(s):  
C Portes Santos ◽  
MT da Silva ◽  
F Moravec
Keyword(s):  
Head Pores

Revision of Hastatobythites and Saccogaster (Teleostei, Bythitidae) with three new species and a new genus

Zootaxa ◽  
2012 ◽  
Vol 3579 (1) ◽  
pp. 1 ◽  
Author(s):  
JØRGEN G. NIELSEN ◽  
WERNER SCHWARZHANS ◽  
DANIEL M. COHEN
Keyword(s):  
New Genus ◽  
Gill Rakers ◽  
Gill Opening ◽  
Frontal Plate ◽  
Fin Ray ◽  
Otolith Morphology ◽  
Gill Filaments ◽  
Three New Species ◽  
Head Pores ◽  
Infor Mation

Material of three similar and probably related genera of the viviparous ophidiiform family, Bythitidae, has been studied.The monotypic Hastatobythites is only known from the original two specimens; re-examination of the paratype and infor-mation of the holotype clearly demonstrates the validity of the genus. The revision of Saccogaster (Cohen & Nielsen1972) was based on 15 specimens. Since then 29 additional specimens have been collected representing 11 species, threeof which are here described: S. brayae, horrida and nikoliviae. Three of the 11 Saccogaster species, S. melanomycter, S.normae and S. rhamphidognatha, differ so much from the remaining eight that a new genus, Parasaccogaster, is de-scribed. The main diagnostic characters used for the three genera are: A pair of spines on frontal plate behind eyes, spineson snout, length of gill filaments on anterior arch, number and length of developed gill rakers, size of gill opening, thick-ness of skin, head pores, otolith morphology, color marks on head, neuromasts on head and head morphometrics, fin ray counts.

Three new species of chydorid cladocerans of subfamily Aloninae (Branchipoda: Anomopoda: Chydoridae) from Brazil

Zootaxa ◽  
2010 ◽  
Vol 2390 (1) ◽  
pp. 1 ◽  
Author(s):  
ARTEM Y. SINEV ◽  
LOURDES M. A. ELMOOR-LOUREIRO
Keyword(s):  
New Species ◽  
The Body ◽  
Basal Segment ◽  
The Third ◽  
Australian Species ◽  
True Diversity ◽  
Three New Species ◽  
Head Pores ◽  
Lateral Head ◽  
South Brazil

Three new species of Aloninae cladocera from Central and South Brazil are described. Two of them, Acroperus tupinamba sp. n. and Alona yara sp. n., were previously recorded from the area as European taxa Acroperus harpae (Baird, 1834) and Alona quadrangularis (O.F. Müller, 1776), respectively. Acroperus tupinamba differs from the other species of Acroperus in smaller size, long posterior setae of the valves, shorter and wider postabdomen, short setules near the base of postabdominal claw, long apical spines of antenna, and peculiar morphology of limb IV exopodite. Alona yara differs from A. quadrangularis and A. kolweizii Van Damme & Dumont, 2008 in the number of ventral setules on ventral face of limb I, from A. boliviana Sinev et Coronel, 2006 in the shape of the body and postabdomen, narrow labral keel, and absence of projections on epipodites IV–V. The third new species, Celsinotum candango sp.n. differs from all other species of the genus in proportions of postabdomen. It differs from Australian species (C. hypsophilum Frey, 1991, C parooensis Frey, 1991, and C. platamoides Frey, 1991) in a less developed dorsal keel, lateral head pores located close to midline, longer spine on basal segment of antennal exopodite, and in the presence of extremely large projections on exopodites IV–V. Celsinotum candango differs from Brazilian C. laticaudatum Smirnov & Santos-Silva, 1995 in a shorter spine on basal segment of antenna exopodite, in the shape of postabdomen and in morphology of postabdominal denticles. At present, Aloninae fauna of Brazil includes 35 species, and true diversity is undoubtedly higher, with more new species to be expected in the country.

Relocation of Alona manueli Sinev & Zawisza 2013 and a new closely related species from the Ecuadorian Andes to the new genus Alpinalona (Cladocera, Chydoridae, Aloninae)

Zootaxa ◽  
2017 ◽  
Vol 4350 (3) ◽  
pp. 563 ◽  
Author(s):  
MIGUEL ALONSO ◽  
ARTEM Y. SINEV
Keyword(s):  
North America ◽  
South America ◽  
High Altitude ◽  
Related Species ◽  
National Park ◽  
New Genus ◽  
Ventral Surface ◽  
Closely Related Species ◽  
Head Pores ◽  
Lateral Head

Alpinalona gen. nov. is described for two species found in high altitude localities of continental North America and South America: Alona manueli (Sinev & Zawisza, 2013) from the Neovolcanic Mexican Axis and Alpinalona cajasi gen. et sp. nov from El Cajas National Park (Ecuador). The new genus is separated from Hexalona and allies by the absence of limb VI and filter plate V;  from Anthalona, Coronatella and the elegans-group by having seven setae on exopodite III, and by the presence of a well-developed seta 1 on the IDL of limb III; from Alona s. str. (quadrangularis-group) and Ovalona, by two main head pores, lateral head pores located close to main pores, and by a bilobed exopodite V; from Ovalona by the presence of seta (i) and inner setae 2–3 on limb I, and setae 4–5 of exopodite III being of same size; and from Alona s. lato by weakly developed marginal denticles of postabdomen, clusters of thin setulae on ventral surface of limb I, and by plumose setae 5–6 of exopodite IV. Alpinalona cajasi sp. nov. can be easily distinguished from A. manueli by the following characteristics: prominent posterodorsal angle of carapace; broader headshield; longer PP distance; and postanal marginal denticles organized into groups.  

New genus of Cladocera of subfamily Aloninae (Anomopoda: Chydoridae) from the Mekong River

Zootaxa ◽  
2017 ◽  
Vol 4276 (3) ◽  
pp. 416 ◽  
Author(s):  
ARTEM Y. SINEV ◽  
SUPATRA TIANG-NGA ◽  
LA-ORSRI SANOAMUANG
Keyword(s):  
East Asia ◽  
New Genus ◽  
Mekong River ◽  
South East Asia ◽  
Fine Sediments ◽  
Thoracic Limb ◽  
Riverine Habitats ◽  
Basal Spine ◽  
Head Pores

A rheophylous cladoceran, Rheoalona mekongensis sp. nov., gen. nov. (Anomopoda: Chydoridae: Aloninae) is described from the Mekong River, South-East Asia. Rheoalona gen. nov. belongs to the Coronatella-branch of Aloninae, it differs from Karualona Dumont & Silva-Briano, 2000 in absence of seta 1 of IDL of thoracic limb I and by particularly strong lateral setae of postabdomen; from Anthalona Van Damme, Sinev & Dumont, 2011 in a wide connection between major head pores, lack of cosmaria, and two-flaming torch setae of limb IV; and from Coronatella Dybowski & Grochowski, 1894 in two major head pores, very small elementary denticles of postabdomen, and a very small basal spine of postabdominal claw. R. mekongensis sp. nov. is specially adapted for dwelling in the upper layer of fine sediments of turbid rivers. Our finding stress the importance of sampling in riverine habitats for the full inventories of the cladoceran fauna. 

scholarly journals Revision of the costata-group of Alona s. lato (Cladocera: Anomopoda: Chydoridae) confirms its generic status

2016 ◽  
Author(s):  
Artem Y. Sinev ◽  
Henri J. Dumont
Keyword(s):  
Geographic Distribution ◽  
New Genus ◽  
Habitat Type ◽  
Major Clade ◽  
Trunk Limbs ◽  
Relationship Of ◽  
The Relationship ◽  
Basal Spine ◽  
Head Pores ◽  
Lateral Head

By taking Flavalona gen. nov. out of Alona s.l. (Cladocera: Anomopoda: Chydoridae), the last major clade has now been removed from this polyphyletic assemblage. Flavalona gen. nov. is a monophylum defined by having three, rarely two connected head pores and slit-shaped, rarely rounded lateral head pores. Postabdomen rather long, distally narrowed, with robust marginal denticles and weakly developed lateral fascicles of setules. End-claw weakly curved and with short basal spine. Male postabdomen with gonopores opening at the end of a penis-like outgrowth. Trunk limbs: exopodite of P2 with seta; inner portion of P4 with flaming-torch shaped setae; P5 with filter plate of three setae; P6 a large simple lobe. The relationship of the new genus with other Aloninae remains to be determined. A key to the 11 species of the genus is provided and a discussion of their geographic distribution and habitat type is given.

New and rare Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina

Zootaxa ◽  
2012 ◽  
Vol 3334 (1) ◽  
pp. 1 ◽  
Author(s):  
ARTEM Y. SINEV ◽  
ALEXEY A. KOTOV
Keyword(s):  
New Species ◽  
Type Species ◽  
New Taxon ◽  
Common Features ◽  
Head Pores ◽  
Lateral Head

Several poorly known cladocerans of the subfamily Aloninae (Cladocera: Anomopoda: Chydoridae) from Indochina re-gion are reinvestigated. Revision of the genus Anthalona Van Damme, Sinev & Dumont 2011 from Thailand, Cambodiaand Vietnam reveals that the region is inhabited by Paleotropic Alona harti harti Van Damme, Sinev & Dumont, 2011 anda new species, Alona sanoamuangae sp. nov., which appears to be an Indochinese endemic. It has a number of featuresprimitive for the genus, including non-specialised IDL setae and non-differentiated scraping setae. So far, these characterswere recorded only in the Congolese A. simplex Van Damme, Sinev & Dumont, 2011, but A. sanoamuangae sp. nov. dif-fers from it in the trilobed cosmaria of the lateral head pores. An updated key for the Anthalona of Eurasia and Africa isprovided. The endemic Alona freyi Idris & Fernando, 1981 belongs to the recently described genus Matralona VanDamme & Dumont, 2010, sharing numerous common features with the type species, Matralona simoneae (Dumont,1981). Alona macronyx Daday, 1898, despite numerous unique features, should be moved from Alona to Celsinotum Frey,1999, and the diagnosis of Celsinotum should be emended. Finally, a new taxon with several unique features, Coronatellasp., was found in Thailand. Our investigation demonstrates once more the necessity of successive revisions of cladoceran taxa, even in relatively well-studied regions.

A new genus and species of eelpout (Teleostei: Zoarcidae) from Brazil

Zootaxa ◽  
2008 ◽  
Vol 1852 (1) ◽  
pp. 65 ◽  
Author(s):  
MICHAEL MAIA MINCARONE ◽  
M. ERIC ANDERSON
Keyword(s):  
New Genus ◽  
Southeastern Brazil ◽  
Gill Slit ◽  
New Genus And Species ◽  
Upper Lip ◽  
Caudal Vertebrae ◽  
Fin Rays ◽  
Head Pores ◽  
Janeiro State ◽  
Pelvic Fin

The eelpout Leucogrammolycus brychios gen. et sp. nov., is described from nine specimens, five males (92–198 mm SL) and four females (99–205 mm SL), collected from off Rio de Janeiro state, southeastern Brazil, at depths from 536 to 632 m. It is mainly characterized by the following combination of characters: vertebrae 23–26 + 62–66 = 85–92; first anal-fin pterygiophore associated with first or second caudal vertebrae; scales absent; lateral line with mediolateral and ventral branches; upper lip broadly adnate to snout tip; gill slit not reaching ventrally to opposite lower end of pectoral-fin base; pelvic-fin rays 2; head pores relatively few, small, rounded; and whitish mid-body stripe forming a chevron on top of snout.

Re-evaluation of the genus Biapertura Smirnov, 1971 (Cladocera: Anomopoda: Chydoridae)

Zootaxa ◽  
2020 ◽  
Vol 4885 (3) ◽  
pp. 301-335
Author(s):  
ARTEM Y. SINEV
Keyword(s):  
Geographic Distribution ◽  
Type Species ◽  
Morphological Analysis ◽  
Habitat Type ◽  
Sister Group ◽  
Posterior Portion ◽  
Australian Species ◽  
Large Size ◽  
Head Pores ◽  
Distal Lobe

The genus Biapertura Smirnov, 1971, with type species B. affinis (= Lynceus affinis Leydig, 1860) is re-evaluated, removing the affinis-group from polyphyletic Alona s. lato. Biapertura s. str. is a taxon which could be defined by large size (up to 1.1 mm), having head shield with triangular posterior portion and two connected major head pores, and by having massive postabdomen with over 10 well-developed composite marginal denticles and well-developed lateral fascicles of setulae. Thoracic limbs of Biapertura are of Hexalona-type, inner distal lobe of limb I bear extremely large, usually claw-like seta 1. Australian species of the genus, B. kendallensis (Henry, 1919) and B. elliptica (Sinev, 1997), are fully redescribed here. Morphological analysis suggests that Biapertura s. str. is a sister-group to Alona s. str. A key to seven species of the genus is provided and a discussion of their geographic distribution and habitat type is given. 

Cladocerans of genus Alona Baird, 1843 (Cladocera: Anomopoda: Chydoridae) and related genera from Aguascalientes State, Mexico

Zootaxa ◽  
2012 ◽  
Vol 3569 (1) ◽  
pp. 1 ◽  
Author(s):  
ARTEM Y. SINEV ◽  
MARCELO SILVA-BRIANO
Keyword(s):  
New Species ◽  
The Other ◽  
Ventral Margin ◽  
Cladoceran Species ◽  
Head Pores

Eight cladoceran species of Alona s. lato and related genera were found in Aguascalientes state, Mexico, after extensivesampling efforts. Two of them are new for science. Both new species belong to the pulchella-group of Alona and sharedistinctive features of the group. Alona aguascalientensis sp. nov. differs from the other species of the group by thepresence of denticles on posteroventral corner of valves, by a moderately elongated narrow postabdomen with weaklyprotruding distal angle and postanal marginal denticles of the same size, and by the morphology of major head pores, withconnection between central and posterior pores always absent, while connection between anterior and central porespresent or interrupted. A. anamariae sp. nov. differs from the other species of the group by the long last seta in the anteriorgroup of setae of the ventral margin of valves, by short, relatively wide, evenly narrowing distally postabdomen, and bythe small size (it is the smallest species of the group). Both new species seems to be endemic of Central Mexican Plateau.Other species found are A. glabra Sars, 1901, A. cf. guttata Sars, 1862, A. ossiani Sinev, 1908, A. setigera Megard, 1967, Coronatella circumfimbriata (Megard, 1967) and Leberis davidi (Richard, 1895).

Sign in / Sign up

Export Citation Format

Share Document