The genus Bornetia (Rhodophyta, Ceramiaceae) and its Southern Australian representatives, with dscription of Involucrana gen. Nov

1968 ◽  
Vol 16 (2) ◽  
pp. 197 ◽  
Author(s):  
RN Baldock ◽  
HBS Womersley
Keyword(s):  
Type Species ◽  
Marine Algae ◽  
New Genus ◽  
Lateral Branch ◽  
The Other ◽  
Terminal Branch ◽  
Additional Species ◽  
Australian Species ◽  
Fusion Cell

Two species of southern Australian marine algae have been previously placed in Bornetia. One, B. binderiana (Sonder) Zanardini, shows the generic features of the type species from Europe (B. secundiflora), and an additional species, B. tenuis, is also described for the genus. Study of the type and the above two Australian species shows that Bornetia is characterized by subdichotomous filaments of elongate cells, a 5-6(-8)-celled fertile axis developing procarps successively and also non-functional pseudocarpogonia, an involucre produced from the lower cells of the fertile axis, and a large stellate fusion cell; and by the production of tetrasporangia and spermatangial heads in condensed clusters in which the terminal branch cells curve around the cluster as an involucre. The other Australian species, B. ? Meredithiana J. Agardh, has procarps confined to the subterminal cell of a 3-celled fertile axis, and after fertilization sterile cells associated with the procarp produce an inner involucre around the carposporophyte, which has a massive fusion cell. Sessile polysporangia are borne in condensed lateral branch clusters. A new genus, Involucrana, is proposed for this species. Its relationships are probably with Sphondylothamnion, which also differs from other known Ceramiaceae in having a similar inner involucre.

Rediagnosis of the squat lobster genus Gastroptychus Caullery, 1896, with a new genus Sternostylus and a new family Sternostylidae (Crustacea: Decapoda: Anomura: Chirostyloidea)

Zootaxa ◽  
2018 ◽  
Vol 4524 (1) ◽  
pp. 77 ◽  
Author(s):  
KEIJI BABA ◽  
SHANE T. AHYONG ◽  
KAREEN E. SCHNABEL
Keyword(s):  
Type Species ◽  
Anterior Margin ◽  
New Genus ◽  
Sister Group ◽  
Sensu Stricto ◽  
The Other ◽  
Squat Lobster ◽  
Terminal Spine ◽  
New Family ◽  
Left And Right

The chirostyloidean squat lobster genus Gastroptychus Caullery, 1896 is revised and is split into two genera: Gastroptychus sensu stricto (type species, Ptychogaster spinifer A. Milne-Edwards, 1880) and Sternostylus new genus (type species, Ptychogaster formosus Filhol, 1884). Gastroptychus sensu stricto, is restricted to nine species with a sternal plastron, at sternite 3, abruptly demarcated from the preceding sternites (excavated sternum) by a distinct step forming a well-defined transverse or concave anterior margin at the articulation with maxillipeds 3, the maxillipeds 3 widely separated, with the distal parts accommodated in the excavated sternum between the left and right maxillipeds 3 when folded, and the P2–4 dactyli with the terminal spine demarcated by a suture. Sternostylus new genus, represented by 12 species, has the sternite 3 anteriorly bluntly produced medially and steeply sloping anterodorsally to the anterior sternite, with a pair of spines directly behind the anterior margin, the left and right maxillipeds 3 adjacent, and the P2–4 dactyli ending in an indistinctly demarcated corneous spine. The above-mentioned characters of Gastroptychus are consistent with Chirostylidae sensu stricto. Published molecular phylogenies indicate, however, that Sternostylus is the sister group to all the other Chirostylidae, and is designated the type genus of a new family, Sternostylidae. 

Troglocoelotes gen. n., a new genus of Coelotinae spiders (Araneae, Agelenidae) from caves in South China

Zootaxa ◽  
2019 ◽  
Vol 4554 (1) ◽  
pp. 219 ◽  
Author(s):  
BING LI ◽  
ZHE ZHAO ◽  
CHUNTIAN ZHANG ◽  
SHUQIANG LI
Keyword(s):  
South China ◽  
Type Species ◽  
New Genus ◽  
New Combinations ◽  
Dna Barcodes ◽  
Additional Species

A new genus Troglocoelotes Z. Zhao & S. Li gen. n. from South China is described with the type species T. yumiganensis Z. Zhao & S. Li sp. n. (♂♀) and eight additional species: T. bailongensis Z. Zhao & S. Li sp. n. (♀), T. banmenensis Z. Zhao & S. Li sp. n. (♀), T. liangensis Z. Zhao & S. Li sp. n. (♂♀), T. nongchiensis Z. Zhao & S. Li sp. n. (♀), T. qixianensis Z. Zhao & S. Li sp. n. (♂♀), T. proximus (Chen, Zhu & Kim, 2008) comb. n. (♀), T. tortus (Chen, Zhu & Kim, 2008) comb. n. (♂♀) and T. yosiianus (Nishikawa, 1999) comb. n (♀). All species are cave dwellers and not found outside of caves. New combinations are all ex-Draconarius Ovtchinnikov, 1999. DNA barcodes are provided for all species. 

A new genus of Pseudomesochrinae Willen, 1996 (Copepoda, Harpacticoida, Pseudotachidiidae) from the Guinea Basin

Zootaxa ◽  
2009 ◽  
Vol 2096 (1) ◽  
pp. 287-298 ◽  
Author(s):  
ELKE WILLEN ◽  
JANINE DITTMAR
Keyword(s):  
Deep Sea ◽  
Type Species ◽  
New Genus ◽  
The Other ◽  
Polar Regions ◽  
New Taxon ◽  
Widespread Occurrence ◽  
Species Numbers ◽  
A New Species ◽  
Swimming Leg

A new species of the new genus Keraia gen. nov. from the Guinea Basin is described in the present paper. The new taxon belongs to the Pseudomesochrinae Willen, 1996, which until now has contained only the genus Pseudomesochra T. Scott, 1902. Both genera are prevalent in the deep sea. Whereas Pseudomesochra reaches quite high individual and species numbers in the investigated samples of the DIVA 1, DIVA 2 and ANDEEP deep-sea expeditions, Keraia is found only occasionally and as single specimens. Keraia is characterised among others by a modified antenna exopodite and the shape of P1. Pseudomesochra on the other hand can still be identified as a monophylum by specialised setation on the P1 endopodite and the lack of the inner setae of the first segment of swimming leg exopodites. Other species of Keraia gen. nov. are K. longiseta (Vasconcelos, George & Santos 2008) and the type species K. tamara (Smirnov, 1946). The available records implicate a widespread occurrence of Keraia gen. nov. from the northern to the southern Atlantic, and even reaching both northern and southern polar regions. Up to now all individuals that have been found occur exclusively at deep-sea sites and in very low abundances.

On Schornikovdona gen. nov. (Ostracoda, Candonidae) from rheocrene springs in Texas (U.S.A.)

Crustaceana ◽  
2017 ◽  
Vol 90 (11-12) ◽  
pp. 1443-1461 ◽  
Author(s):  
Okan Külköylüoğlu ◽  
Mehmet Yavuzatmaca ◽  
Derya Akdemi̇r ◽  
Peter H. Diaz ◽  
Randy Gibson
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Terminal Segment ◽  
The Other ◽  
Surface Normal ◽  
Diagnostic Characteristics ◽  
The Family ◽  
Sensory Seta

A new candonid genus,Schornikovdonagen. nov., with its type speciesSchornikovdona bellensissp. nov., is described from rheocrene springs of Bell County, Texas. It is designated to the tribe Candonini due to the smooth carapace surface, normal pore openings with sensory seta, the presence of a 5-segmented first antenna, two long sexual bristles on the second antenna in males, the narrowly fused terminal segment of the Md palp, a long penultimate segment of the Mxl palp, two long and one short setae on the terminal segment of T3, the absence of an “e” seta on T3, the presence of a posterior seta on the uropod, the presence of 5 + 2 rows of spines on Zenker’s organ, and other characteristics found in the tribe. The main diagnostic characteristics separating the new genus from the other genera in the tribe are the shape of the carapace, the reduced numbers of segments in the first antenna, reduction or absence of exopodial setae in the second antenna, asymmetrical clasping organs, the uropod with one rod-shaped claw, the different shape of the hemipenis, and differences in parts of the chaetotaxy. Based on these differences, we proposeSchornikovdonagen. nov. as a new genus, with the new speciesS. bellensissp. nov., in the subfamily Candoninae in the family Candonidae.

Dolichopodidae (Diptera) from Papua New Guinea. XIV. Paramedetera, a new genus in the Medeterinae

1997 ◽  
Vol 11 (2) ◽  
pp. 309 ◽  
Author(s):  
Patrick Grootaert ◽  
Henk J. G. Meuffels
Keyword(s):  
Papua New Guinea ◽  
Type Species ◽  
New Genus ◽  
New Guinea ◽  
The Other ◽  
Other Hand ◽  
Ancestral Branch ◽  
West Sumatra

Paramedetera, gen. nov., is described on the basis of three species: P. papuensis, sp. nov., the type species from Papua New Guinea, P. sumatrensis, sp. nov., from the lowlands in West Sumatra, and P. orientalis (Hollis, 1964), comb. nov., from the highlands in West Sumatra. Paramedetera, gen. nov., is closely allied to Medetera, but is a more ancestral branch. It is phylogenetically situated between on one hand Corindia and Thrypticus and on the other hand Medetera and Dolichophorus.

Convergence with naticids: phenotypic phylogenetic study on some Antarctic littorinoideans, with description of the zerotulid new genusPseudonatica, and its presence in Brazil (Mollusca, Caenogastropoda)

2017 ◽  
Vol 98 (6) ◽  
pp. 1365-1381
Author(s):  
Luiz Ricardo L. Simone
Keyword(s):  
Phylogenetic Analysis ◽  
Type Species ◽  
New Genus ◽  
The Other ◽  
Taxonomic Position ◽  
Phylogenetic Study ◽  
Brazilian Coast ◽  
Antarctic Species ◽  
Oesophageal Gland ◽  
Phenotypic Characters

Some Antarctic littorinoideans have a remarkable convergence with Naticoidea in shell and operculum features. Two naticid-like species of that group are studied in their phenotypic features in order to improve their taxonomy and to discuss the meaning of that convergence, as the former are herbivore-detritivore and the latter active predatory organisms. One of the studied species is the littorinidLaevilacunaria antarctica(Martens, 1885). The other belongs to a new genus –Pseudonatica, with the type species also newly described:P. antarctica, the genus is tentatively placed in Zerotulidae. Another Pseudonatica is also described,P. ampullarica, based only on shells collected by Marion-Dufresne French expedition off Brazilian coast, this finding expands the occurrence of zerotulids northwards. Besides the similarities of shell and operculum, other structures of these Antarctic species also show singular similarities with naticoideans, such as the wide foot, the complexity of opercular attachment in pedal opercular pad, the wide oesophageal gland, and the coiled arrangement of the pallial oviduct. The phenotypic characters were coded and inserted in a previous large phylogenetic analysis on Caenogastropoda (Simone, 2011), furnishing a wide basis for discussion on the characters, taxonomic position, evolution and adaptations of these organisms.

Studies of Raspy Crickets: Magnumtergalis n. gen. a new gryllacrid genus with elongate male terminalia (Orthoptera: Gryllacrididae) from Colombia

Zootaxa ◽  
2020 ◽  
Vol 4896 (1) ◽  
pp. 123-130
Author(s):  
OSCAR J. CADENA-CASTAÑEDA ◽  
CÉSAR QUIROGA GIRALDO ◽  
CARLOS JULIO ARANGO DÍAZ ◽  
WOLFANG ANDRÉS RODRÍGUEZ SOTO
Keyword(s):  
Type Species ◽  
New Genus ◽  
The Other ◽  
Leaf Rolling ◽  
Colombian Andes ◽  
The Family ◽  
Central Cordillera

Magnumtergalis n. gen. a new genus from the Inter-Andean Valleys and midlands of the Colombian Andes’ central cordillera is described. Two very peculiar species are placed within this genus, M. aldarioarenasi n. sp. (type species) and M. albonigra n. comb. An unusual terminalia to the family Gryllacrididae characterizes this genus, in which the ninth tergite is noticeably prolonged, covering the other structures of the male terminalia. This is the first genus of leaf-rolling crickets described from the Neotropics in the last 80 years. 

A new genus of Oedemopsini (Hymenoptera: Ichneumonidae: Tryphoninae) with a key to the genera of the tribe

2006 ◽  
Vol 138 (4) ◽  
pp. 464-472 ◽  
Author(s):  
Andrew M.R. Bennett
Keyword(s):  
Type Species ◽  
New Genus ◽  
New Guinea ◽  
The Other

AbstractScudderopsisgen. nov. is described from New Guinea (type species: Scudderopsis baiyerensissp. nov.). This monobasic genus is placed in the tribe Oedemopsini. A diagnosis and key are provided to distinguish Scudderopsis from the other 11 genera in the tribe.

The Trichostrongyle Genus Graphidioides

1925 ◽  
Vol 3 (3-4) ◽  
pp. 163-166 ◽  
Author(s):  
Thomas W. M. Cameron
Keyword(s):  
Type Species ◽  
New Genus ◽  
Posterior Extremity ◽  
Accessory Piece ◽  
The Other ◽  
The Family ◽  
To Receive

In 1923, the writer in studying some species of the family Trichostrongylidæ, had occasion to create a new genus Graphidioides to receive the form previously known as Graphidium affine (Megnin, 1895), Railliet and Henry, 1909. This species differs from the type species of the genus Graphidium on the following points: absence of cervical papillæ, shape of bursa and disposition of ventro-ventral rays, shape of accessory piece and spicules, shape of the ovejectors and vagina and posterior extremity of the female. In an addendum on the remaining species of Graphidium, G. rudicaudatum the following statement was made:—“Graphidium rudicaudatus R. & H., 1909, from Viscacia viscacia from Argentina resembles G. affinis very closely. It differs mainly by its smaller size, equal ovejectors, sharply pointed externo-dorsal ray and absence of an accessory piece. Its affinities to Graphidioides are so close, that the latter point requires re-investigation. The other points are only of specific value, and it is proposed to include it in this new genus. Should the absence of an accessory piece be confirmed, its position would require re-determination.”

scholarly journals A redescription of deep-channel ghost knifefish, Sternarchogiton preto (Gymnotiformes: Apteronotidae), with assignment to a new genus

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Maxwell J. Bernt ◽  
Aaron H. Fronk ◽  
Kory M. Evans ◽  
James S. Albert
Keyword(s):  
Sexual Dimorphism ◽  
Body Surface ◽  
Type Species ◽  
New Genus ◽  
Phylogenetic Analyses ◽  
The Body ◽  
The Other ◽  
Valid Species ◽  
Deep Channel ◽  
Secondary Sexual Dimorphism

ABSTRACT From a study of morphological and molecular datasets we determine that a species originally described as Sternarchogiton preto does not form a monophyletic group with the other valid species of Sternarchogiton including the type species, S. nattereri. Previously-published phylogenetic analyses indicate that this species is sister to a diverse clade comprised of six described apteronotid genera. We therefore place it into a new genus diagnosed by the presence of three cranial fontanels, first and second infraorbital bones independent (not fused), the absence of an ascending process on the endopterygoid, and dark brown to black pigments over the body surface and fins membranes. We additionally provide a redescription of this enigmatic species with an emphasis on its osteology, and provide the first documentation of secondary sexual dimorphism in this species.

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