Description of Neolepidapedoides subantarcticus sp. nov. (Digenea, Lepocreadiidae) from sub-Antarctic notothenioid fishes

2011 ◽  
Vol 56 (3) ◽  
Author(s):  
Witold Jeżewski ◽  
Krzysztof Zdzitowiecki ◽  
Zdzisław Laskowski
Keyword(s):  
New Species ◽  
Seminal Vesicle ◽  
The Body ◽  
Tierra Del Fuego ◽  
Intestinal Bifurcation ◽  
External Seminal Vesicle ◽  
Excretory Vesicle ◽  
Beagle Channel ◽  
Terminal Genitalia

AbstractNeolepidapedoides subantarcticus sp. nov. (Digenea, Lepocreadiidae) is reported from the intestine, mainly the jejunum, of fishes in the eastern mouth of the Beagle Channel and in the harbour of Ushuaia in the Beagle Channel (Tierra del Fuego, Argentina) at a depth 7–30 m. The typical host is Patagonotothen longipes, other hosts are P. tessellata, P. brevicauda and Champsocephalus esox. The male terminal genitalia indicates that the new species belongs to the genus Neolepidapedoides (Lepocreadiidae, Lepocreadiinae). The most important taxonomic features are the presence of eye-spots, the spined tegument, the “Opechona-type” cirrus-sac, the external seminal vesicle free in the parenchyma, the gonads arranged in tandem, the vitelline follicles extending from the level of the oesophagus in the forebody to the posterior end of the body and an I-shaped excretory vesicle reaching to the intestinal bifurcation and the absence of a pseudoesophagus. Ten previously described species differ from the N. subantarcticus sp. nov. mainly in the extent of the vitelline fields and length of the excretory vesicle which reaches into forebody.

Paragymnophallus odhneri gen. n., sp. n. (Trematoda: Gymnophallidae) for Gymnophallus somateriae sensu Odhner (1900, 1905)

1973 ◽  
Vol 51 (8) ◽  
pp. 807-810 ◽  
Author(s):  
Hilda Lei Ching
Keyword(s):  
New Species ◽  
Seminal Vesicle ◽  
Ventral Sucker ◽  
Genital Pore ◽  
Egg Size ◽  
New Genus ◽  
The Body ◽  
Intestinal Bifurcation ◽  
Somateria Spectabilis ◽  
Excretory Bladder

Odhner's specimens of Gymnophallus somateriae were studied and are assigned to a new genus and new species because of the wide genital pore located between the ventral sucker and the intestinal bifurcation. Paragymnophallus odhneri also differs from G. somateriae as described by Levinsen (1881) and Ching (1973), in the body spination, 2:1 sucker ratio, nature of the vitellaria, and the egg size. G. somateriae reported by Ryzhikov et al. (1966) from Somateria spectabilis in Chutkova is considered to be P. odhneri because of the checkerboard arrangement of spines, 2:1 sucker ratio, and small eggs. Pending reexamination of the genital pore, G. bilis Brinkmann, 1956 and G. minor Ryzhikov, 1962 could belong to Paragymnophallus. The new genus, most similar to Gymnophallus in the bipartite seminal vesicle, follicular vitelline glands, and Y-shaped excretory bladder, differs in the location and size of the genital pore, larger sucker ratio, and large pharynx. The wide genital pore some distance from the ventral sucker and the large oral sucker are like that of Parvatrema but Parvatrema has a club-shaped seminal vesicle, minute body, compact vitellaria, and V-shaped excretory bladder. A key to the genera of Gymnophallidae is included.

scholarly journals New data on the morphology and phylogenetic connections of Postlepidapedon opisthobifurcatum (Trematoda, Lepocreadioidea: Lepidapedidae), a parasite of Antarctic and sub-Antarctic fishes

2018 ◽  
Vol 55 (2) ◽  
pp. 95-101 ◽  
Author(s):  
S. G. Sokolov ◽  
F. K. Khasanov ◽  
I. I. Gordeev
Keyword(s):  
Seminal Vesicle ◽  
Intestinal Parasite ◽  
Proximal Part ◽  
Molecular Data ◽  
External Seminal Vesicle ◽  
Internal Seminal Vesicle ◽  
Antarctic Fishes ◽  
Glandular Cells ◽  
Thin Walled ◽  
Terminal Genitalia

Summary The trematode Postlepidapedon opisthobifurcatum (Zdzitowiecki, 1990) is a common intestinal parasite of the gadiform fishes of the Southern Ocean. In this work, we supplement the description of the species with the anatomy of the terminal part of the reproductive system and with molecular data. The male terminal genitalia are characterised by the presence of the external seminal vesicle and cirrus-sac. The external seminal vesicle is surrounded by aciniform groups of outer prostatic cells. Groups of outer prostatic cells and proximal parts of their ducts are associated with a thin-walled membrane that is connected to the proximal edge of the cirrus-sac. The cirrus-sac is claviform, with a long proximal part accommodating the tubular, thin-walled internal seminal vesicle and ducts of outer prostatic cells. The female terminal genitalia are represented by a thick-walled metraterm, which is surrounded by aciniform groups of glandular cells. Phylogenetic analysis based on 28S rDNA partial sequences data placed P. opisthobifurcatum into the monophyletic group Lepidapedidae, including the species Myzoxenus insolens (Crowcroft, 1945), Intusatrium robustum Durio et Manter, 1968, and Postlepidapedon uberis Bray, Cribb et Barker, 1997. However, we were unable to detect direct phylogenetic connections between P. opisthobifurcatum and P. uberis.

Mesocoelium malayanum sp.n. (Digenea: Brachycoeliidae) in a frog, Rana macrodon Dumeril and Bibron 1941, from Malaysia

1977 ◽  
Vol 51 (3) ◽  
pp. 205-208 ◽  
Author(s):  
James R. Palmieri ◽  
John T. Sullivan
Keyword(s):  
New Species ◽  
Oral Sucker ◽  
Genital Pore ◽  
Anterior Testis ◽  
Intestinal Bifurcation ◽  
Excretory Vesicle ◽  
Posterior Testis ◽  
A New Species

ABSTRACTMesocoelium malayanum sp.n. is described from the frog Rana macrodon, in Malaysia. Elongate body, broader anteriorly, measuring 1·900 (1·679–2·070) mm long by 0·404 (0·380–0·437) wide, tegument aspinose oral sucker 0·212 (0·200–0·228) by 0·202 (0·191–0·205), acetabulum 0·141 (0·132–0·150) by 0·139 (0·123–0·146), prepharynx present, oesophagus 0·115 (0·096–0·137), caeca reaching posterior ⅓ of body, anterior testis 0·097 (0·087–0·110) by 0·091 (0·087–0·100) dorsal to acetabulum, posterior testis 0·094 (0·087–0·101) by 0·092 (0·091–0·100), cirrus pouch 0·121 (0·111–0·130) by 0·047 (0·041–0·055), genital pore at left of midline of oesophagus just anterior to intestinal bifurcation, ovary 0·110 (0·091–0·127) by 0·089 (0·085–0·096) on left of body and posterior to acetabulum, vitelline glands with single follicles extending from intestinal bifurcation to ends of caeca, excretory vesicle I-shaped and eggs 0·040 (0·037–0·046) by 0·023 (0·022–0·024). Although morphologically related to M. maroccanum and M. meggitti, M. malayanum is considered to be a new species.

Cruznema brevicaudatum n. sp. (Nematoda: Rhabditidae) and Indiana coimbatoriensis n. sp. (Nematoda: Pulchrocephalidae) from the mole-cricket, Gryllotalpa africana Beauvois, from India

1972 ◽  
Vol 50 (11) ◽  
pp. 1457-1462 ◽  
Author(s):  
M. A. Latheef ◽  
A. R. Seshadri
Keyword(s):  
New Species ◽  
Seminal Vesicle ◽  
Unknown Function ◽  
Vas Deferens ◽  
First Record ◽  
The Body ◽  
Lateral Field ◽  
Mole Cricket ◽  
A New Species

Cruznema brevicaudatum is described as a new species because its lips are not distinctly set off, and it has nine pairs of tubular and one pair of pyriform bursal ribs. Two diverticula of unknown function occur at the junction of the vas deferens and seminal vesicle. This is the first record of a Cruznema as an insect associate. Indiana coimbatoriensis is recognized as a new species on the basis of size and arrangement of spines on the body and lateral field. Only females were found.

Description of Gymnophallus somateriae (Levinsen, 1881) from Macoma inconspicua and diving ducks from Vancouver, Canada

1973 ◽  
Vol 51 (8) ◽  
pp. 801-806 ◽  
Author(s):  
Hilda Lei Ching
Keyword(s):  
New Species ◽  
Seminal Vesicle ◽  
Ventral Sucker ◽  
Genital Pore ◽  
Body Shape ◽  
New Genus ◽  
Distal Portion ◽  
The Body ◽  
Diving Ducks ◽  
Excretory Bladder

In the same clam host, the metacercaria of Gymnophallus somateriae differs from those of Lacunovermis conspicuus and Meiogymnophallus multigemmulus in the body shape and spination; small, irregular vitellaria; and lyre-shaped excretory bladder. The adult from diving ducks differs from Levinsen's description in the shorter posterior range of the uterus and shorter length of the eggs. The fusiform body, sucker ratio, location of the ventral sucker in the posterior third of the body, and bipartite seminal vesicle with large distal portion and smaller proximal portion are characteristic of the species. G. somateriae of Odhner (1900, 1905) belongs to a new genus and new species because of the size and location of the genital pore and will be described in the next paper. G. gibberosus Loos-Frank, 1971 is closely related to G. somateriae but has a ventral sucker in the middle third of the body, a uterus only in the anterior half of the body, and a proximal seminal vesicle smaller in diameter than the ventral sucker.

A new species of Myxinidocotyle (Monogenea: Acanthocotylidae: Myxinidocotylinae) from captive sixgill hagfish, Eptatretus hexatrema (Chordata: Myxinidae), with amendment of the subfamily diagnosis

Zootaxa ◽  
2010 ◽  
Vol 2650 (1) ◽  
pp. 47 ◽  
Author(s):  
DAVID B. VAUGHAN ◽  
KEVIN W. CHRISTISON
Keyword(s):  
South Africa ◽  
New Species ◽  
Seminal Vesicle ◽  
Intestinal Caecum ◽  
Accessory Gland ◽  
The Body ◽  
Male Accessory Gland ◽  
Copulatory Tube ◽  
A New Species

Myxinidocotyle eptatreti n. sp. is described from the skin of the sixgill hagfish, Eptatretus hexatrema collected for exhibition at the Two Oceans Aquarium in Cape Town, South Africa. The new species is the first acanthocotylid described from South Africa and differs significantly from the only two known Myxinidocotyle species by the morphology of the sclerotised male copulatory tube and the presence of a diverticulated intestinal caecum. The subfamily diagnosis is amended to include a single seminal receptacle, found within the anterior concave portion of the ovary and excludes the vaginal seminis receptaculum which is considered the seminal vesicle. The vagina travels ventrally over the seminal vesicle and does not fuse with it bilaterally as originally proposed by Malmberg & Fernholm (1989). Myxinidocotyle spp. possess 8 or 9 testes. The proximal male accessory gland reservoirs are connected by an intricate network of fine ducts to the field of extensive male accessory gland cells extending along the length of the body proper. Observations on the locomotion and attachment of live worms in vitro are discussed and the presence of adhesive secretions is confirmed for the haptoral glands and anterior glands.

Observations on the Parorchis acanthus complex (Philophthalmidae: Parorchiinae) with the description of three new species of Parorchis Nicoll, 1907 and the replacement of the preoccupied junior homonym Paratrema Dronen & Badley, 1979 with Stenomesotrema nomen novum

Zootaxa ◽  
2008 ◽  
Vol 1843 (1) ◽  
pp. 1 ◽  
Author(s):  
NORMAN O. DRONEN ◽  
CHARLES K. BLEND
Keyword(s):  
New Species ◽  
Seminal Vesicle ◽  
Oral Sucker ◽  
Body Shape ◽  
External Seminal Vesicle ◽  
Body Type ◽  
Separate Species ◽  
Additional Species ◽  
Basic Body ◽  
Nomen Novum

A brief history of the genus Parorchis Nicoll, 1907 (Philophthalmidae: Parorchiinae) is provided along with the description of 3 new species: Parorchis catoptrophori n. sp., distinguished by a bipartite pharynx with a larger, anterior, muscular primary pharynx, followed by a smaller posterior nonmuscular secondary part composed of 2 smaller posterior extensions; Parorchis longivesiculus n. sp., distinguished by an external seminal vesicle that overreaches the acetabulum posteriorly, extending into the hindbody to about midway between the testes and the acetabulum; and Parorchis ralli n. sp., distinguished by an external seminal vesicle, the posterior third of which is tubular and coiled. The preoccupied junior homonym Paratrema Dronen & Badley, 1979 (Parorchiinae) is replaced by Stenomesotrema nomen novum, and a rediagnosis of the genus is given wherein Stenomesotrema numenii n. comb. is assigned as the type species in the genus, and Stenomesotrema asiaticus n. comb. is proposed as a second species in the genus. Species of Parorchis are divided into 2 basic body types. The first type contains those species with a barbell-like or hourglass body shape, a rudimentary head collar, symmetrical to tandem testes, 2 rows of corner spines on the head collar, a preequatorial acetabulum, and a forebody that is wider than the hindbody. The second body type, called the “Parorchis body type”, contains those species with a pyriform body shape, a well-developed head collar, symmetrical testes, a single continuous row of circumoral spines on the head collar, and an equatorial acetabulum. There appears to be 2 subtypes of the Parorchis body type: subtype 1 containing those species possessing smooth to slightly irregular testes (not deeply lobed) and an esophagus lacking diverticuli; and subtype 2 containing those species having irregular and deeply lobed testes and an esophagus possessing lateral diverticuli. A comparative analysis of museum-deposited specimens of P. acanthus revealed as many as 9 possible additional species of Parorchis. This suggests potential problems in using measurements of structures alone without differences in additional corroborating specific features to separate species of Parorchis. Along with measurements, the number and size of spines on the circumoral collar, the presence or absence of a prepharynx, an intertesticular space, and esophageal diverticula as well as the extent of the posttesticular space, the length of the metraterm, egg size and the ratios of the width of the oral sucker to the width of the acetabulum and the width of the pharynx to the width of the oral sucker appear useful in distinguishing species of Parorchis.

Dendrorchis pampae sp. n. (Digenea: Gorgoderidae) from Cynopoecilus melanotaenia (Cyprinodontiformes: Cynolebiidae) a killifish from southern Brazil, with an emended diagnosis of Dendrorchis

2018 ◽  
Vol 93 (2) ◽  
pp. 203-207
Author(s):  
C.M. Monteiro ◽  
E.W. Wendt ◽  
Y.D. Zebral
Keyword(s):  
New Species ◽  
South America ◽  
First Record ◽  
The Body ◽  
Intestinal Bifurcation ◽  
Swim Bladder ◽  
Southern Brazil ◽  
Annual Killifish ◽  
A New Species ◽  
Emended Diagnosis

AbstractA new species of Dendrorchis is described and compared with others in the genus. The parasites were found in the swim bladder of the annual killifish Cynopoecilus melanotaenia. Hosts were collected from a seasonal wetland in southern Brazil. The main characteristics of D. pampae are: genital pore in the intestinal bifurcation region elongate and lobed vitellaria uterine loops limited to the acetabular region and to the rear end of the body; and wide intestinal caeca. An emended diagnosis of the genus Dendrorchis includes the characteristics of the new species. This is the first record of an adult digenean in an annual killifish from South America.

Three new species, two new genera, and new family Biphragmosagittidae (Сhaetognatha) from Southwest Pacific Ocean

2011 ◽  
Vol 20 (1) ◽  
pp. 161-173
Author(s):  
A.P. Kassatkina
Keyword(s):  
New Species ◽  
Type Species ◽  
Morphological Characters ◽  
The Body ◽  
New Order ◽  
New Genera ◽  
New Family ◽  
The Family ◽  
Three New Species

Resuming published and own data, a revision of classification of Chaetognatha is presented. The family Sagittidae Claus & Grobben, 1905 is given a rank of subclass, Sagittiones, characterised, in particular, by the presence of two pairs of sac-like gelatinous structures or two pairs of fins. Besides the order Aphragmophora Tokioka, 1965, it contains the new order Biphragmosagittiformes ord. nov., which is a unique group of Chaetognatha with an unusual combination of morphological characters: the transverse muscles present in both the trunk and the tail sections of the body; the seminal vesicles simple, without internal complex compartments; the presence of two pairs of lateral fins. The only family assigned to the new order, Biphragmosagittidae fam. nov., contains two genera. Diagnoses of the two new genera, Biphragmosagitta gen. nov. (type species B. tarasovi sp. nov. and B. angusticephala sp. nov.) and Biphragmofastigata gen. nov. (type species B. fastigata sp. nov.), detailed descriptions and pictures of the three new species are presented.

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