Modiomytilus, a new mytilid bivalve from the Tertiary of southern Patagonia

1990 ◽  
Vol 64 (3) ◽  
pp. 377-382 ◽  
Author(s):  
Miguel Griffin
Keyword(s):  
New Species ◽  
Adductor Muscle ◽  
New Taxon ◽  
Santa Cruz ◽  
Southern Patagonia ◽  
Two New Species

Modiomytilus n. gen. is described from Tertiary sediments exposed in the southwestern corner of Santa Cruz province (Argentina). This large mytilid is characterized by its ornamentation of strong comarginal undulations, its smooth ligamentary ridge, and its relatively large anterior adductor muscle. Two new species are assigned to it: Modiomytilus argentinensis n. sp., from the Centinela Formation (Miocene) south of Lago Argentino, and Modiomytilus mercerati n. sp., from the Río Turbio Formation (Eocene) in Sierra Dorotea. Although other species belonging to this new taxon and previously referred to Mytilus have been described from Tertiary sediments in the region, none are known so far from rocks of comparable age outside Patagonia.

Peonza: new gastropod genus from the middle Tertiary of Patagonia and Chile

1994 ◽  
Vol 68 (2) ◽  
pp. 279-286 ◽  
Author(s):  
Amalia M. Olivera ◽  
William J. Zinsmeister ◽  
S. Graciela Parma
Keyword(s):  
New Species ◽  
Temporal Distribution ◽  
Late Eocene ◽  
Tierra Del Fuego ◽  
Early Miocene ◽  
Late Oligocene ◽  
Southern Chile ◽  
Santa Cruz ◽  
Two New Species

A new Tertiary gastropod genus, Peonza n. gen., is described, along with two new species, P. torquata from southern Argentina and P. benjamina from southern Chile. These muricacean gastropods, of uncertain familial status, occur in the late Eocene San Julián Formation and in the late Oligocene to early Miocene? Monte León Formation, Santa Cruz Province, Argentina. They also were recorded in the (probably) Oligocene Magellanian beds in Tierra del Fuego, Argentina, and in early Miocene deposits of the Tres Montes region in the Chilean Canals. In spite of the small number of specimens, Peonza n. gen. seems to have had a wide geographic and temporal distribution.

Eunotia (Bacillariophyta) biodiversity from high altitude, freshwater habitats in the Mugecuo Scenic Area, Sichuan Province, China

Phytotaxa ◽  
2019 ◽  
Vol 394 (2) ◽  
pp. 133 ◽  
Author(s):  
FEN LUO ◽  
QINGMIN YOU ◽  
PAN YU ◽  
WANTING PANG ◽  
QUANXI WANG
Keyword(s):  
New Species ◽  
Sichuan Basin ◽  
Tibet Plateau ◽  
Hengduan Mountains ◽  
New Taxon ◽  
Monsoon Climate ◽  
Two New Species ◽  
Freshwater Habitats ◽  
The Sichuan Basin ◽  
Qinghai Tibet Plateau

Mugecuo Scenic Area is located in the northern Hengduan Mountains between the Sichuan Basin and the Qinghai-Tibet Plateau and has a subtropical humid monsoon climate. The area is at an altitude of 2600–3800 m above sea level (asl), with water originating mostly from melting mountain snow. In the region, a total of 20 Eunotia species have been identified, including two new species: E. mugecuo sp. nov., consisting of valves arched, clavate, ends broadly rounded, and terminal raphe fissures at the junction between valve face and mantle. The other newly-identified species is classified named as E. filiformis sp. nov., consisting of valves gently bent, ends not noticeably or only slightly inflated, broadly rounded, with external terminal raphe fissures curving in an angle of 180° back from apical nodules. Five newly recorded species have been identified in China, including E. odebrechtiana, E. michaelis, E. pomeranica, E. pseudogroenlandica and E. superpaludosa. Here, we discuss the new species and new taxon records through light and scanning microscopic documentation of valve morphology, along with key internal and external valve characteristics, and analyze the distribution of Eunotia in the Mugecuo Scenic Area.

Distribution of Diplolaimella and Diplolaimelloides species from Patagonian lagoons and coastal waters (Nematoda: Monhysteridae), Chubut and Santa Cruz provinces (Argentina)

2009 ◽  
Vol 89 (4) ◽  
pp. 711-718 ◽  
Author(s):  
Catalina T. Pastor de Ward ◽  
Virginia Lo Russo
Keyword(s):  
New Species ◽  
Coastal Waters ◽  
East Coast ◽  
Santa Cruz ◽  
Coastal Salt Marsh ◽  
Salty Water ◽  
The Family ◽  
Two New Species ◽  
New Localities ◽  
First Time

This paper focuses on Diplolaimella and Diplolaimelloides two very cosmopolitan genera inhabiting lotic freshwater to salty water inland, groundwater and coastal waters systems, providing a review of their taxonomy with new keys, and their distribution on the east coast of Patagonia and inland Patagonia. Two new species belonging to the genus Diplolaimelloides of the family Monhysteridae are described from Patagonian salty lagoons and coastal areas, and the Chubut and Santa Cruz provinces of Argentina: Diplolaimelloides tehuelchus sp. nov. has four bursal and three postcloacal papillae, short gubernaculum, and spicules longer than 50 μm; it has been found in Patagonian salty lagoons and in high coastal salt marsh areas. Diplolaimelloides warwicki sp. nov. is characterized by the angular shape of the spicules and the long gubernaculum. Diplolaimella ocellata is recorded for the first time in Patagonian salty lagoons and new localities in coastal waters are recorded for Diplolaimella gerlachi Pastor de Ward, 1984.

Two new species of lizards from the Liolaemus lineomaculatus section (Squamata: Iguania: Liolaemidae) from southern Patagonia

Zootaxa ◽  
2011 ◽  
Vol 3120 (1) ◽  
pp. 1 ◽  
Author(s):  
MARIA FLORENCIA BREITMAN ◽  
MICAELA PARRA ◽  
CRISTIAN HERNÁN FULVIO PÉREZ ◽  
JACK WALTER SITES, JR.
Keyword(s):  
New Species ◽  
Analysis Of Variance ◽  
Genetic Characterization ◽  
Function Analysis ◽  
Univariate Analysis ◽  
Principal Component ◽  
Genetic Distances ◽  
Southern Patagonia ◽  
Two New Species ◽  
Genetic Characters

Two new species of the lineomaculatus clade of the Liolaemus lineomaculatus section are described from southern Patagonia in Argentina. Liolaemus morandae sp. nov. is found in S Chubut province and Liolaemus avilae sp. nov. inhabits NW Santa Cruz province. Several tests were performed to diagnose these new species as distinct lineages. Univariate analysis of variance (ANOVA), principal component analysis (PCA), discriminant function analysis (DFA), non-parametric multivariate analysis of variance (NPMANOVA), as well as a genetic characterization through molecular analysis of variance (AMOVA) were performed; genetic distances between described and these new species are reported. The new Liolaemus species differ from other members of the lineomaculatus group in morphometric, meristic, qualitative and genetic characters; moreover they inhabit different phytogeographical provinces and districts. With these descriptions, the number of species now recognized in the lineomaculatus section is twenty one (including one more description that is in press).

A remarkable new genus of carnivorous, sessile bivalves (Mollusca: Anomalodesmata: Poromyidae) with descriptions of two new species

Zootaxa ◽  
2008 ◽  
Vol 1764 (1) ◽  
pp. 1 ◽  
Author(s):  
JOSÉ H. LEAL
Keyword(s):  
New Species ◽  
New Zealand ◽  
New Genus ◽  
Florida Keys ◽  
New Taxon ◽  
Lateral Expansion ◽  
Free Living ◽  
Single Tooth ◽  
Two New Species ◽  
Anatomical Characters

Dilemma, a new genus of sessile septibranch bivalves is described. The new taxon encompasses at least three species, of which two are new: D. frumarkernorum new species, from off the Florida Keys, D. spectralis new species, from off Vanuatu, and “Corculum” inexpectatum Crozier, 1966, from off the Three Kings Islands, New Zealand, known only from its shell. The absence of ctenidia and presence of a septum, size and arrangement of siphons and siphonal tentacles, extensive fusion of the mantle margins allocate the new genus within the septibranch bivalves. A siphonal area with 15 tentacles, a large and eversible incurrent siphon, ostial apertures in the septum, and a hermaphroditic reproductive system suggest inclusion in the Poromyidae. The presence of three paired groups of septal ostia in the new genus is a feature shared with poromyids in the genus Cetoconcha. Unusual symmetry and form constitute the most striking features of the new genus. There is a strong anteroposterior compression and lateral expansion associated with ca. 30º rotation of the largest dimension (height) in relation to the anteroposterior axis. The shell hinge includes a single tooth and socket on each valve, and an external, but deeply sunken ligament. The two new species, mutually distinguishable by shell and anatomical characters, are known from live-collected specimens found adhering to rocks by means of robust byssus, which indicates attachment for life. The presence of ostracod remains in the digestive tract of one specimen of one of the new species and of a cirolanid isopod in the stomach of the holotype of the second new species are evidence of predation. Although predation by infaunal and free-living bivalves is known to occur throughout the Anomalodesmata, in particular within the septibranchs, discovery of the new genus reveals an unusual instance of predation by sessile, permanently attached mollusks.

Systematics of the Ameerega rubriventris complex (Anura: Dendrobatidae) with descriptions of two new cryptic species from the East-Andean versant of Peru

Zootaxa ◽  
2019 ◽  
Vol 4712 (2) ◽  
pp. 211-235
Author(s):  
JASON L. BROWN ◽  
KAREN SIU-TING ◽  
RUDOLF VON MAY ◽  
EVAN TWOMEY ◽  
WILSON X. GUILLORY ◽  
...  
Keyword(s):  
New Species ◽  
Cryptic Species ◽  
Strong Support ◽  
Genomic Data ◽  
Dominant Frequency ◽  
Advertisement Call ◽  
New Taxon ◽  
Southern Peru ◽  
The Past ◽  
Two New Species

We describe two new species of poison frog from central and southern Peru that have been referred to as Ameerega picta, A. hahneli, or A. altamazonica throughout the past thirty years. Our phylogenies generated with genomic data provide strong support that the two new species are successive sisters to two described taxa, A. rubriventris and A. altamazonica, and collectively comprise the Ameerega rubriventris complex. The first new taxon, Ameerega panguana sp. nov., can be distinguished from all other Ameerega by its combination of a unique white venter and an advertisement call of 1–2 notes per second. The second new taxon, Ameerega imasmari sp. nov., is the only cryptically colored Ameerega species that is disttributed across the Fitzcarrald Arch in Southern Peru which possesses a ‘peep’ advertisement call consisting of 3–4 notes per second and a dominant frequency of 4.3–4.5 kHz. Within the Ameerega rubriventris complex, we observed differences between species in their ventral coloration, tympanum diameter, and call, which suggest that these taxa are reproductively isolated from each other. 

New fossil woods of Proteaceae from the Oligocene of southern Patagonia

2007 ◽  
Vol 20 (2) ◽  
pp. 119 ◽  
Author(s):  
Roberto R. Pujana
Keyword(s):  
New Species ◽  
Wood Anatomy ◽  
Fossil Wood ◽  
Fossil Species ◽  
Extant Species ◽  
Southern Patagonia ◽  
Two New Species ◽  
Perforation Plates

The scarce fossil wood record of Proteaceae is complemented with the addition of a new morphogenus with two new species from the Oligocene of Patagonia, Scalarixylon patagonicum, gen. nov., sp. nov., and S. grandiradiatum, gen. nov., sp. nov. They become the first two fossil species that have all the typical characteristics of Proteaceae wood anatomy: wide multiseriate rays, tangential bands of vessels with unilateral banded associated parenchyma and simple perforation plates. They seem to be related to extant species that inhabit the subantarctic forests of Patagonia.

Graziaphylus, a new genus and two new species of Eremophila-feeding (Scrophulariceae) Phylinae (Insecta: Heteroptera: Miridae) from Australia

Zootaxa ◽  
2021 ◽  
Vol 4958 (1) ◽  
pp. 319-326
Author(s):  
RANDALL T. SCHUH ◽  
RUTH SALAS
Keyword(s):  
New Species ◽  
Northern Hemisphere ◽  
Male Genitalia ◽  
New Genus ◽  
New Taxon ◽  
Two New Species ◽  
Distinctive Structure

The new genus Graziaphylus is described to include two new species, Graziaphylus joceliae and G. nigripes. This new taxon is part of a large suite of Heteroptera from Australia known to feed on species of Eremophila (Scrophulariaceae), including other members of the Miridae as well as the Tingidae. The appearance of Graziaphylus spp. is similar to that of Xiphoidellus Weirauch and Schuh from Australia, and to Chlamydatus Fieber from the Northern Hemisphere (among other genera), but with scalelike setae, and elongate pulvilli adnate over most of the claw length, and the distinctive structure of the male genitalia. 

NEW SPECIES AND NEW COMBINATIONS IN THE SOUTH AMERICAN GENUS LESSINGIANTHUS (ASTERACEAE: VERNONIEAE)

2008 ◽  
Vol 65 (3) ◽  
pp. 359-368 ◽  
Author(s):  
M. Dematteis
Keyword(s):  
New Species ◽  
The Other ◽  
South American ◽  
New Taxon ◽  
New Combinations ◽  
The South ◽  
Two New Species

Two new species of the South American genus Lessingianthus (Asteraceae: Vernonieae) are described and illustrated. One of these species, Lessingianthus arctatus, bears a resemblance to L. linearis (Spreng.) H.Rob. and L. rosmarinifolius (Less.) H.Rob., but can be separated from them by its almost glabrous phyllaries, solitary heads and longer internodes. The other new taxon, Lessingianthus longicuspis, can be easily separated from L. cataractarum (Hieron.) H.Rob. and L. bardanoides (Less.) H.Rob., and other taxa of the genus, by the combination of petiolate leaves, aristate phyllaries and inflorescence bracts alternate to the heads. Four other taxa previously included in Vernonia are transferred to the genus Lessingianthus.

Sellaphora mayrii (Bacillariophyceae), a new diatom from the Argentinean Patagonia

Phytotaxa ◽  
2020 ◽  
Vol 437 (3) ◽  
pp. 135-146
Author(s):  
M. LUJÁN GARCÍA ◽  
EDUARDO A. MORALES ◽  
DAVID G. MANN ◽  
NORA I. MAIDANA
Keyword(s):  
Electron Microscopy ◽  
New Species ◽  
Size Range ◽  
Central Area ◽  
Chemical Characteristics ◽  
New Taxon ◽  
Santa Cruz ◽  
Physico Chemical ◽  
Argentinean Patagonia ◽  
A New Species

A new species of Sellaphora was found in modern and fossil sediments from shallow-lake Laguna Gemelas Este, Santa Cruz, Argentina. The new taxon was studied with light microscopy and scanning electron microscopy. We present a detailed analysis of its morphology, supporting its placement in the genus Sellaphora Mereschkowsky, and report the physico-chemical characteristics of the lake where it was found. Sellaphora mayrii sp. nov. is most similar to S. smirnovii Chudaev & Gololobova, a small-celled species first reported from Russia. Both species have in common the valve outline, but the new species from Argentina has a wider size range and, when observed with electron microscopy, is visibly different regarding stria pattern, central area, and shape of the areolae.

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