scholarly journals Taxonomic composition and distribution of cephalochordates (Cephalochordata: Amphioxiformes) from Mexico

2017 ◽  
Vol 44 (3) ◽  
pp. 497-503
Author(s):  
Luis Fernando Del Moral-Flores ◽  
Miguel Ángel Guadarrama-Martínez ◽  
César Flores-Coto
Keyword(s):  
Gulf Of Mexico ◽  
Pacific Coast ◽  
Yucatan Peninsula ◽  
Taxonomic Composition ◽  
The West ◽  
Taxonomic Key ◽  
The Pacific ◽  
Mexican Caribbean ◽  
West Part ◽  
Northeastern Coast

Based on the number of specimens examined, review of reference collections and literature, we determined the presence of four cephalochordates (two genera and one family) in the seas of Mexico; moreover, the registry of the locations is denoted also a taxonomic key for their identification comes attached. The presence of three of the four species for the Gulf of Mexico and the Mexican Caribbean is registered, of which Branchiostoma caribaeum has the largest distributional area, from Veracruz coasts to the Yucatan Peninsula; B. longirostrum has been registered only on the west part of the Gulf of Mexico and Asymmetron lucayanum in front of the northeastern coast of Yucatan. Branchiostoma californiense is the only one registered on the Pacific coast of Mexico but it counts with a wider distribution.

scholarly journals First record and geographic range extension of the coccolithophore Scyphosphaera apsteinii Lohman, 1902 (Haptophyta: Pontosphaeraceae) from the Pacific coast of Mexico

Check List ◽  
2015 ◽  
Vol 11 (5) ◽  
pp. 1754 ◽  
Author(s):  
Francisco O. López-Fuerte ◽  
Ismael Gárate-Lizárraga ◽  
David A. Siqueiros-Beltrones ◽  
Ricardo Yabur
Keyword(s):  
Gulf Of Mexico ◽  
Type Species ◽  
Pacific Coast ◽  
First Record ◽  
Geographic Range ◽  
Central Pacific ◽  
The West ◽  
The Pacific ◽  
The Caribbean ◽  
First Time

The coccolithophorid Scyphosphaera apsteinii is here reported for the first time from waters off the west coast of the Baja California Peninsula. Scypho­sphaera apsteinii is the type species of the genus Scyphosphaera and had hitherto been recorded only in the Atlantic and Indian Oceans, the Gulf of Mexico, the Mediterranean, and the Caribbean Seas. Specimens were found in samples collected in nets off Isla de Guadalupe in January 2013. This recording thus extends the geographical distribution of S. apsteinii from the Central Pacific (Hawaii) to the Eastern Pacific (NW Mexico).

Host and geographic distribution of Skrjabinoclava spp. (Nematoda: Acuarioidea) in Nearctic shorebirds (Aves: Charadriiformes), and evidence for transmission in marine habitats in staging and wintering areas

1990 ◽  
Vol 68 (12) ◽  
pp. 2539-2552 ◽  
Author(s):  
P. L. Wong ◽  
R. C. Anderson
Keyword(s):  
Gulf Of Mexico ◽  
Pacific Coast ◽  
The United States ◽  
Larval Stages ◽  
Marine Habitats ◽  
The Pacific ◽  
Southern Alberta ◽  
Wintering Areas ◽  
Charadrius Wilsonia ◽  
Charadrius Semipalmatus

Twelve species of shorebirds belonging to the families Charadriidae (N = 3) and Scolopacidae (N = 9) were infected with 11 species of Skrjabinoclava and there was little overlap of parasites between these two families of birds. Most Skrjabinoclava spp. are transmitted apparently in marine staging and (or) wintering areas of their hosts, as indicated by the presence of larval stages of six species. There was no evidence that transmission occurs on the breeding grounds in freshwater habitats. Skrjabinoclava tupacincai, found predominantly in sanderlings (Calidris alba (Pallas)), is transmitted on the Pacific (Washington, California, Chile) and Atlantic coasts (New Jersey) in winter and the Gulf of Mexico (Florida and Texas) in winter and spring. Skrjabinoclava myersi was found, with a single exception, only in sanderlings, and transmission is apparently restricted to coastal Washington and California in winter. Skrjabinoclava bakeri, found predominantly in western sandpipers (Calidris mauri Cabanis), is transmitted on the Pacific coast (California) and in the Gulf of Mexico in winter. Skrjabinoclava morrisoni and Skrjabinoclava pusillae were found mainly in semipalmated sandpipers (Calidrispusilla (L.)). Both parasites are transmitted in the Gulf of Mexico in spring, but S. morrisoni is also transmitted in the Bay of Fundy in fall. Skrjabinoclava inornatae, found mainly in willets (Catoptrophorus semipalmatus (Gmelin)), is transmitted in Louisiana, Texas, and Peru in winter. Skrjabinoclava kritscheri was found only in marbled godwits (Limosafedoa (L.)), and it is suggested that infected birds collected in southern Alberta in spring acquired their infections while wintering along the Pacific coast of the United States. Skrjabinoclava hartwichi, found in black turnstones (Arenaria melanocephala (Vigors)) wintering in California and ruddy turnstones (Arenaria interpres (L.)) wintering in Peru, is transmitted along the Pacific coast of North America. Skrjabinoclava semipalmatae was found in semipalmated plovers (Charadrius semipalmatus Bonaparte) wintering in California. Skrjabinoclava wilsoniae was found in Wilson's plover (Charadrius wilsonia Ord) wintering in Texas and in a black-bellied plover (Pluvialis squatarola (L.)) migrating through southern Alberta in spring. Skrjabinoclava bartlettae was found in black-bellied plovers collected in southern Alberta in spring and Louisiana in winter.

Peniculus asinus (Copepoda: Pennellidae), a new species of copepod parasitic on fishes of the genus Sebastes along the west coast of North America

1977 ◽  
Vol 55 (12) ◽  
pp. 1988-1991 ◽  
Author(s):  
Z. Kabata ◽  
S. N. Wilkes
Keyword(s):  
New Species ◽  
North America ◽  
West Coast ◽  
Pacific Coast ◽  
The West ◽  
Unique Member ◽  
The Pacific ◽  
The Family ◽  
A New Species

Peniculus asinus, a new species of copepod parasitic on Sebastes (Pisces: Teleostei) off the Pacific coast of Canada is described and illustrated. The copepod is an unique member of its genus in that it possesses cephalothoracic holdfast processes. The discovery of a Peniculus with these processes is taken as evidence confirming the place of this genus in the family Pennellidae.

Definition of the Genus Grammonota (Araneae: Erigonidae), with Descriptions of Seven New Species

1959 ◽  
Vol 91 (4) ◽  
pp. 232-242 ◽  
Author(s):  
C. D. Dondale
Keyword(s):  
Rocky Mountains ◽  
West Indies ◽  
Pacific Coast ◽  
James Bay ◽  
The West ◽  
The North ◽  
The Pacific ◽  
Gulf States ◽  
The Many ◽  
Definition Of

Grammonota Emerton, 1882, is one of the many uniform genera that constitute the large and complex family Erigonidae. All of the 28 species and one subspecies recognized by the present writer are American in range, and representatives occur from southwestern Alaska and James Bay in the north to Central America and the West Indies. A few species are arctic-alpine, or are restricted to the Pacific coast, but most occur east of the Rocky Mountains from southern Canada to the Gulf States.

scholarly journals Phylogeography and morphometric variation in the Cinnamon Hummingbird complex: Amazilia rutila (Aves: Trochilidae)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Melisa Vázquez-López ◽  
Nandadevi Córtes-Rodríguez ◽  
Sahid M. Robles-Bello ◽  
Alfredo Bueno-Hernández ◽  
Luz E. Zamudio-Beltrán ◽  
...  
Keyword(s):  
Central America ◽  
Environmental Conditions ◽  
Pacific Coast ◽  
Yucatan Peninsula ◽  
Southern Mexico ◽  
Morphometric Variation ◽  
Divergence Time Estimates ◽  
Yucatán Peninsula ◽  
The Pacific ◽  
Over Time

Abstract Background The Mesoamerican dominion is a biogeographic area of great interest due to its complex topography and distinctive climatic history. This area has a large diversity of habitats, including tropical deciduous forests, which house a large number of endemic species. Here, we assess phylogeographic pattern, genetic and morphometric variation in the Cinnamon Hummingbird complex Amazilia rutila, which prefers habitats in this region. This resident species is distributed along the Pacific coast from Sinaloa—including the Tres Marías Islands in Mexico to Costa Rica, and from the coastal plain of the Yucatán Peninsula of Mexico south to Belize. Methods We obtained genetic data from 85 samples of A. rutila, using 4 different molecular markers (mtDNA: ND2, COI; nDNA: ODC, MUSK) on which we performed analyses of population structure (median-joining network, STRUCTURE, FST, AMOVA), Bayesian and Maximum Likelihood phylogenetic analyses, and divergence time estimates. In order to evaluate the historic suitability of environmental conditions, we constructed projection models using past scenarios (Pleistocene periods), and conducted Bayesian Skyline Plots (BSP) to visualize changes in population sizes over time. To analyze morphometric variation, we took measurements of 5 morphological traits from 210 study skins. We tested for differences between sexes, differences among geographic groups (defined based on genetic results), and used PCA to examine the variation in multivariate space. Results Using mtDNA, we recovered four main geographic groups: the Pacific coast, the Tres Marías Islands, the Chiapas region, and the Yucatán Peninsula together with Central America. These same groups were recovered by the phylogenetic results based on the multilocus dataset. Demography based on BSP results showed constant population size over time throughout the A. rutila complex and within each geographic group. Ecological niche model projections onto past scenarios revealed no drastic changes in suitable conditions, but revealed some possible refuges. Morphometric results showed minor sexual dimorphism in this species and statistically significant differences between geographic groups. The Tres Marías Islands population was the most differentiated, having larger body size than the remaining groups. Conclusions The best supported evolutionary hypothesis of diversification within this group corresponds to geographic isolation (limited gene flow), differences in current environmental conditions, and historical habitat fragmentation promoted by past events (Pleistocene refugia). Four well-defined clades comprise the A. rutila complex, and we assess the importance of a taxonomic reevaluation. Our data suggest that both of A. r. graysoni (Tres Marías Islands) and A. r. rutila (Pacific coast) should be considered full species. The other two strongly supported clades are: (a) the Chiapas group (southern Mexico), and (b) the populations from Yucatán Peninsula and Central America. These clades belong to the corallirostris taxon, which needs to be split and properly named.

Galianthe holmneielsenii (Spermacoceae-Rubiaceae): A New Rheophilous Species from the Pacific Coast of Colombia and Ecuador

2021 ◽  
Vol 46 (2) ◽  
pp. 427-432
Author(s):  
Javier E. Florentín ◽  
Mariela Nuñez Florentin ◽  
Roberto M. Salas
Keyword(s):  
New Species ◽  
West Coast ◽  
Pacific Coast ◽  
Conservation Status ◽  
Seed Traits ◽  
Distribution Map ◽  
The West ◽  
Diagnostic Characters ◽  
The Pacific ◽  
A New Species

Abstract— A new species of Galianthe from the west coast of Colombia and Ecuador that has fruits with indehiscent mericarps is described and illustrated. Galianthe holmneielsenii is most similar to Borreria ocymifolia and G. spicata, but differs in floral, fruit, and seed traits. An illustration of the diagnostic characters, a distribution map, information about the conservation status of the new species, and a key to the Galianthe species in Colombia and Ecuador are provided.

Reproduction and longevity of Aurelia labiata in Roscoe Bay, a small bay on the Pacific coast of Canada

2005 ◽  
Vol 85 (3) ◽  
pp. 575-581 ◽  
Author(s):  
D.J. Albert
Keyword(s):  
Pacific Coast ◽  
Adult Population ◽  
The Moon ◽  
The West ◽  
Tidal Flushing ◽  
Human Contact ◽  
The Pacific ◽  
Gravel Bar ◽  
One Year ◽  
Observation Period

Reproduction by the moon jelly, Aurelia labiata, was observed in a small bay on the west coast of Canada. The bay is located in an area isolated from human contact except in the summer, is sheltered from wind and wave action by mountain ridges, and has limited tidal flushing due to a gravel bar at the entrance that dries at lower low water. Planulae appeared in brood sacs beginning in October and November. The planulae were shed by the end of March and ephyrae emerged in June. Juvenile medusae were estimated to constitute about 30—40% of medusae in the bay in each of the two years of this study. Medusae remained in the bay throughout the year. There was no major visible mortality in the adult population during the two year observation period. Medusae appear to be lost from the bay as a result of tidal flushing. It is argued that in Roscoe Bay Aurelia labiata medusae live for more than one year and that up to 40% of the adult medusae may be two years of age or older.

Marine tube-dwelling diatoms of the Pacific coast of North America. II. Navicula subg. Navicula and a key to the tube-dwelling diatoms of the region

1990 ◽  
Vol 68 (4) ◽  
pp. 707-712 ◽  
Author(s):  
Christopher S. Lobban
Keyword(s):  
North America ◽  
Key Words ◽  
West Coast ◽  
Pacific Coast ◽  
Single Variable ◽  
Morphometric Data ◽  
The West ◽  
The Pacific ◽  
Rectangular Area ◽  
Variable Population

The tube-dwelling cross-lineate Navicula species on the west coast are dominated by a taxon that belongs in or near the N. ramosissima – N. mollis complex. Morphometric data were used to establish that a single, variable population exists. The species was assigned to N. rusticensis. Cells are 28 ± 7 × 5 ± 1 μm and striae number 14 ± 2 in 10 μm; these cells differ from the ramosissima–mollis complex in having 1–3 short central striae that form a narrow rectangular area. The range of size encompasses published limits for both N. ramosissima and N. mollis. A key to tube-dwelling diatoms of the west coast completes this two-part checklist. Key words: diatoms, Pacific, tube-dwelling, Navicula rusticensis, Navicula ramosissima.

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