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.

Corydalis ternatifolia belongs to C. sect. Asterostigmata, not C. sect. Incisae (Papaveraceae): Evidence from morphological and phylogenetic study

Phytotaxa ◽  
2018 ◽  
Vol 382 (2) ◽  
pp. 193
Author(s):  
XIAODONG XU ◽  
DONG WANG
Keyword(s):  
Phylogenetic Analysis ◽  
Type Species ◽  
Phylogenetic Trees ◽  
Strong Support ◽  
Taxonomic Position ◽  
Perennial Herb ◽  
Phylogenetic Study ◽  
Molecular Evidence ◽  
Morphological Comparison ◽  
Matk Gene

Corydalis ternatifolia (Papaveraceae), a perennial herb endemic to China, shares morphological similarities with both C. sect. Incisae and C. sect. Asterostigmata, rendering its taxonomic position controversial. In this study, we carried out a detailed morphological comparison of C. ternatifolia with the related species and conducted a phylogenetic analysis of C. ternatifolia and five species from C. sect. Incisae, three species from C. sect. Asterostigmata (including the type species of these two sections), and additional 21 species of Corydalis from 10 other sections. To reconstruct the phylogenetic relationships, sequences of the nuclear NADPH gene and chloroplast DNA (matK gene + trnG intron) were analyzed using Bayesian inference and maximum parsimony. The resulting four phylogenetic trees shared almost identical topology and resolved C. ternatifolia within C. sect. Asterostigmata with strong support. Our results suggested that C. ternatifolia belongs to the C. sect. Asterostigmata. This study has demonstrated that molecular evidence is effective in resolving the sectional placement of Corydalis species with elusive taxonomic position.

A cladistic revision of Tortopus Needham & Murphy with description of the new genus Tortopsis (Ephemeroptera: Polymitarcyidae)

Zootaxa ◽  
2010 ◽  
Vol 2481 (1) ◽  
Author(s):  
CARLOS MOLINERI
Keyword(s):  
Phylogenetic Analysis ◽  
Fore Wing ◽  
Type Species ◽  
New Genus ◽  
Lateral View ◽  
Median Line ◽  
Male And Female ◽  
Line Drawings ◽  
Neotropical Species ◽  
First Time

The 12 species previously placed in Tortopus together with 3 species newly described here, are revised and included in a phylogenetic analysis. Based on synapomorphic characters on the nymphs and adults of both sexes, Tortopus is restricted to T. igaranus Needham & Murphy, T. circumfluus Ulmer, T. harrisi Traver, T. zottai (Navás), T. bellus Lugo-Ortiz & McCafferty, and T. arenales sp. nov., and the genus is defined by: female parastyli receptors with long furrows anterior to sockets; penes entirely flattened; male ninth abdominal sternum almost separated in two portions by a median notch; mesosternum with furcasternal protuberances contiguous only on basal corner; and nymphs with two subapical tubercles on mandibular tusks. Tortopsis is newly described for T. bruchianus (Navás), T. limoncocha sp. nov., T. obscuripennis (Domínguez), T. parishi (Banks), T. primus (McDunnough), T. puella (Pictet), T. sarae (Domínguez), T. spatula sp. nov., and T. unguiculatus (Ulmer). Tortopsis is characterized by: R sector of female fore wing without additional veins between R 2 and IR; female parastyli receptors C or V-shaped, with sockets opening towards median line; male gonopore associated with a claw-like structure; penes separated from the base; parastyli more than 5 times length of pedestals; parastyli curved in lateral view; nymphs with a single subapical tubercle on mandibular tusks. The study of available type material permitted inclusion of comparative diagnoses, with figures and redescriptions as needed. The male imago of the type species of Tortopus (T. igaranus Needham & Murphy) is described for the first time, as are the female adults of Tortopus bellus Lugo-Ortiz & McCafferty and T. harrisi Traver. Three new Neotropical species based on male and female adults are described: Tortopus arenales and Tortopsis limoncocha from Ecuador, and Tortopsis spatula from Colombia. Keys to separate the adults and nymphs of the genera of Polymitarcyidae, and for male and female adults of all the species of Tortopus and Tortopsis are presented, as well as line drawings, pictures and SEM photographs of important structures.

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. 

An enigmatic new genus of cyclostome braconid wasp (Hymenoptera: Braconidae) from New Zealand

Zootaxa ◽  
2018 ◽  
Vol 4403 (3) ◽  
pp. 594 ◽  
Author(s):  
SERGEY A. BELOKOBYLSKIJ
Keyword(s):  
New Zealand ◽  
Type Species ◽  
New Genus ◽  
Taxonomic Position ◽  
Braconid Wasp

A new enigmatic genus perhaps belonging to the braconid wasp subfamily Pambolinae, Zeachremylus gen. nov. (type species Z. wardi sp. nov.), is described from New Zealand. The taxonomic position of this new genus is discussed. 

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.

A new stegelytrine leafhopper genus from China and Thailand (Hemiptera: Cicadellidae)

Zootaxa ◽  
2006 ◽  
Vol 1333 (1) ◽  
pp. 55 ◽  
Author(s):  
YALIN ZHANG ◽  
CONG WEI ◽  
M. D. WEBB
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Taxonomic Position ◽  
Related Genus ◽  
Two New Species

A new Oriental stegelytrine leafhopper genus, Wyuchiva, and two new species, Wyuchiva elegantula (type species) from Thailand and Wyuchiva menglaensis from China, are described and illustrated. The taxonomic position of the new genus is discussed and phylogenetic remarks on this and a related genus, Temburocera Webb, 1999, are given.

scholarly journals Phylogeny of the Eocene Antarctic Tapetinae Gray, 1851 (Bivalvia, Veneridae) from the La Meseta and Submeseta formations

2020 ◽  
Vol 94 (5) ◽  
pp. 799-818
Author(s):  
Maximiliano Jorge Alvarez ◽  
Claudia Julia del Río
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
New Genus ◽  
Late Eocene ◽  
New Combination ◽  
New Genera ◽  
Systematic Analysis ◽  
Antarctic Species ◽  
The Antarctic ◽  
First Time

AbstractSystematic analysis shows that the Southern Hemisphere bivalve genus Retrotapes includes the Antarctic species R. antarcticus, R. newtoni, and R. robustus and recognizes for the first time the presence of Katelysia represented by K. florentinoi. Two new genera were erected in this study: Marciachlys new genus to include M. inflata new combination, and Adelfia new genus, which includes A. austrolissa new combination and A. omega new species from the Eocene of Antarctica, and the late Eocene Chilean A. arenosa new combination. Eurhomalea carlosi was synonymized with K. florentinoi; Cyclorismina marwicki with R. antarcticus; Gomphina iheringi was considered an indeterminate species; and Cockburnia lunulifera was excluded from the Tapetinae. These systematic assignments are supported by a phylogenetic analysis, which recognizes an Austral clade of Tapetinae, comprising all the genera mentioned above, along with Marcia, Paleomarcia, Atamarcia, and Protapes.UUID: http://zoobank.org/a8c91a9f-99ec-4235-8416-d398771a3eb2

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.

Taxonomic note: redefinition of the genus Broomea and its relationship to Batioladinium gen. nov. (Cretaceous)

1975 ◽  
Vol 53 (12) ◽  
pp. 1239-1243 ◽  
Author(s):  
Wayne W. Brideaux
Keyword(s):  
Type Species ◽  
New Genus ◽  
Taxonomic Position ◽  
Taxonomic Note ◽  
Current Information

The type species of the genus Broomea Cookson and Eisenack possesses an intercalary archeopyle formed by loss of a single intercalary paraplate. Species with demonstrable apical archeopyles, formerly assigned to Broomea, are excluded by redefinition of that genus and placed in Batioladinium gen. nov. The taxonomic position of five other species previously assigned to Broomea cannot be resolved on the basis of current information. Transferred to the new genus are Batioladinium jaegeri (Alberti) comb, nov., designated herein as the type species; B. longicornutum (Alberti) comb. nov.; B. micropodum (Eisenack and Cookson) comb. nov.; and provisionally, B.? exiguum (Alberti) comb. nov. and B.? pelliferum (Alberti) comb. nov.

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