Two new species of Distaplia (Tunicata: Ascidiacea) from the SW Atlantic, Argentina

Zootaxa ◽  
2013 ◽  
Vol 3620 (1) ◽  
pp. 192-200
Author(s):  
CRISTIAN LAGGER ◽  
MARCOS TATIÁN

The ascidian fauna from the Southwestern Atlantic(ArgentineSea) have scarcely been studied and have rarely been sampled. The existing scanty ascidian records are from specimens collected by dredging many decades ago. During samplings in the San Matias Gulf (Río Negro, Patagonia), two new Distaplia species were found. Distaplia naufragii sp. nov. was collected in the subtidal zone attached to a shipwreck, while the other species, Distaplia fortuita sp. nov. was found released by the tides in the sandy intertidal zone. These two new species differ deeply from each other in the size and morphology of their zooids. They represent one third of the known species belonging to the family Holozoidae in theSW Atlantic. These results reinforce the importance of new studies in this extensive but little explored area that is, in addition, susceptible to invasion by non-native species.

Zootaxa ◽  
2017 ◽  
Vol 4250 (4) ◽  
pp. 347
Author(s):  
ANTONELA MARTELLI ◽  
VIRGINIA LO RUSSO ◽  
GABRIELA VILLARES ◽  
CATALINA T. PASTOR DE WARD

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. 


2020 ◽  
Vol 96 (2) ◽  
pp. 723-745
Author(s):  
Juliana Lopes Segadilha ◽  
Cristiana Silveira Serejo

Based on specimens collected from eulittoral zone in rocky shores of northeast of Rio de Janeiro (Brazil) on 2017, two new tanaidaceans species from two different suborders are described: Apseudomorpha brasiliensissp. nov. (Apseudomorpha, Metapseudidae) and Pseudozeuxo fischerisp. nov. (Tanaidomorpha, Pseudozeuxidae). Diagnostic characters of Apseudomorpha brasiliensis are mandible palp article-2 and article-3 with six and nine finely penicillate setae on inner margin, respectively; pereopod-1 carpus and propodus with two and four ventral spines, respectively; pleonites 2 and 5 with pleura having long distal seta; uropod exopod shorter than endopod articles 1–2 combined, endopod four-articled. Pseudozeuxo fischeri is characterized by pereopods 1–3 coxa with long seta about half as long as basis; pereopods 2–3 carpus with ventrodistal seta; propodus with two ventral setae; pereopods 4–6 propodus with two ventral spines and one seta; uropod endopod two- and exopod one-articled. This is the first record of the family Pseudozeuxidae and the metapseudid subfamily Metapseudinae from the Southwestern Atlantic (Brazil). Remarks on their associations with macroalgae and identification keys to world species of Apseudomorpha and Pseudozeuxo are provided.


Zootaxa ◽  
2012 ◽  
Vol 3368 (1) ◽  
pp. 128 ◽  
Author(s):  
JINWOOK BACK ◽  
WONCHOEL LEE

A study of harpacticoid copepods from the intertidal zone of Jeju Island in the South Sea of Korea resulted in the discovery of two new paramesochrid species. They are placed in the genus Apodopsyllus Huys, 2009 on account of the following combination of characters: the absence of P2–P4 endopods, the poorly defined body segmentation, the two-segmented P1 endopod and exopod, and the fusion of the P2-P4 coxae with the respective body somites. Apodopsyllus gwakjiensis sp. nov. is most closely related to A. bermudensis (Coull & Hogue, 1978), but clearly distinguishable from it by the following characters: the concave shape of the baseoendopod with two bare setae, P4 basis without endopodal seta, and certain detailed characteristics of the mouthparts. Apodopsyllus unisetosus sp. nov. is easily distinguished from its congeners by the antennary exopod, which is armed with a single apical seta. In addition, A. unisetosus has the baseoendopod of P5 fused with somite, the P1 armed with one inner and one outer basal seta, and the unique shape of the male P6. Keys to genera of the family Paramesochridae Lang, 1944, as well as to species of the genus Apodopsyllus Huys, 2009 are provided.


2012 ◽  
Vol 21 (1) ◽  
pp. 131-144 ◽  
Author(s):  
A.G. Kirejtshuk ◽  
A. Nel

In the paper two new species of the genus Rhyzobius Stephens, 1829 (R. antiquus sp. nov. and R. gratiosus sp. nov.) and one new species of the genus Nephus Mulsant 1846 (N. subcircularis sp. nov. without a certain subgeneric placement) from the Lowermost Eocene amber of Oise are described. A short review of known fossil records of the family Coccinellidae is given.


Crustaceana ◽  
2016 ◽  
Vol 89 (4) ◽  
pp. 431-458 ◽  
Author(s):  
Jong Guk Kim ◽  
Jong Guk Kim ◽  
Tae Won Jung ◽  
Jong Guk Kim ◽  
Tae Won Jung ◽  
...  

Herein two new species of the genusSyngastesMonard, 1924 are described from South Korea, with detailed descriptions and illustrations. Both new copepods,Syngastesmulticavussp. nov. andS. pseudofoveatussp. nov., have two inner setae on the first exopodal segment of P2 and P3.Syngastesmulticavussp. nov. most closely resemblesS. gibbosusBartsch, 1999 reported from Australia, as they both have a five-segmented antennule in the female. However,Syngastesmulticavussp. nov. has a rounded body outline instead of the gibbose outline observed inS. gibbosus.Syngastespseudofoveatussp. nov. resemblesS. foveatusBartsch, 1994 in almost all aspects. However, they differ clearly in the number of setae on the first exopodal segment of P2 and P3. We also provide a key to species of the genusSyngastesworldwide. The present study is the first record of the family Tegastidae in Korean waters.


Author(s):  
Carol Simon ◽  
Guillermo San Martín ◽  
Georgina Robinson

Two new species of South African Syllidae of the genusSyllisLamarck, 1818 are described.Syllis unzimasp. nov. is characterized by having unidentate compound chaetae with long spines on margin, a characteristic colour pattern and its reproduction by vivipary. Vivipary is not common among the polychaetes, but most representatives occur in the family Syllidae Grube, 1850 (in five otherSyllisspecies, two species ofDentatisyllisPerkins, 1981 and two species ofParexogoneMesnil & Caullery, 1818).Syllis unzimasp. nov. differs from the other viviparous species in having large broods (>44 juveniles) which develop synchronously. Development of the juveniles is similar to that of free-spawningSyllisspecies, but the appearance of the first pair of eyespots and the differentiation of the pharynx and proventricle occur later inS. unzima.Syllis amicarmillarissp. nov., is characterized by having an elongated body with relatively short, fusiform dorsal cirri and the presence of one or two pseudosimple chaeta on midbody parapodia by loss of blade and enlargement of shaft.Syllis unzimasp. nov. was found in high densities on culturedHolothuria scabraJaeger, 1833 with single specimens found on a culturedCrassostrea gigasThunberg, 1793 and on coralline algae, respectively, whileS. amicarmillariswas found mainly in sediment outside an abalone farm and less frequently on culturedHaliotis midaeLinnaeus, 1758. We discuss the possible benefits of the association withH. scabratoS. unzimasp. nov.


2011 ◽  
Vol 61 (4) ◽  
pp. 811-816
Author(s):  
Dong Liu ◽  
Wojciech Niedbała ◽  
Josef Starý

Author(s):  
Dong Liu ◽  
Min Huang

Two new species belonging to the family Steganacaridae are described from Oriental part of China: Plonaphacarus luxiensis sp. nov. differs from Plonaphacarus concavus Liu, Wu & Chen, 2011 by the long and stout interlamellar and lamellar setae, lateral prodorsal carinae absent, exobothridial setae vestigial, anterodorsal part of notogaster not concave dorsally, notogastral setae c1 and anal setae short and spiniform, setae c1 positioned close to anterior border of notogaster and setae d on femora I distanced to distal end of segment; Plonaphacarus hailingensis sp. nov. differs from congeneric species by the presence of heterotrichy of notogastral setae, in which setae c1, c2 and c3 long and flagellate distally, prodorsum with median crista and posterior furrows, sensilli long and setiform, and rostral setae short, spiniform and semi-erect. A key to all known species of Plonaphacarus from China are provided to facilitate identification of this group.


Zootaxa ◽  
2021 ◽  
Vol 4950 (2) ◽  
pp. 398-400
Author(s):  
OKAN KÜLKÖYLÜOĞLU

Most recently, Coimbra et al. (2020) published an article in this journal (Zootaxa, 4729 (2): 177–194) questioning the taxonomic position of the genus Copytus Skogsberg, 1939 (Crustacea, Ostracoda) along with proposing it as the type genus of their new family (Copytidae Coimbra et al., 2020), and erecting two new species that were listed by previous authors as Copytus sp. 1 and Copytus sp. 2. The main diagnostic characteristics of their new proposed family (and the genus Copytus) are the hinge type and muscle scars on the carapace and/or valves (see lines 6–8 from the bottom, p. 179 in Coimbra et al. 2020). They also underlined that (p. 179) “...this study is based exclusively on the morphology of the animals’ hard parts”. While the authors considered another genus (Neocopytus) proposed by Külköylüoğlu, Colin & Kılıç (2007) of the family Neocytherididae as invalid, they interestingly transferred some species of Neocopytus to Copytus as species of their new family (Coimbra et al. 2020). Herein, my point with the comments listed below is to clarify that, when possible, both soft and hard parts should be considered in taxonomy, and such an integrated approach clearly indicates that Neocopytus is a valid and taxonomically useful genus. 


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