scholarly journals Seagrass Halodule wrightii as a new habitat for the amphioxus Branchiostoma californiense (Cephalochordata, Branchiostomidae) in the southern Gulf of California, Mexico

ZooKeys ◽  
2019 ◽  
Vol 873 ◽  
pp. 113-131
Author(s):  
Lucía Campos-Dávila ◽  
Claudia J. Pérez-Estrada ◽  
Ricardo Rodríguez-Estrella ◽  
Enrique Morales-Bojórquez ◽  
Fernando G. Brun-Murillo ◽  
...  
Keyword(s):  
Growth Pattern ◽  
Gulf Of California ◽  
Morphological Variability ◽  
First Record ◽  
Morphological Characters ◽  
Minimum Size ◽  
Halodule Wrightii ◽  
Suitable Habitats ◽  
Sexually Mature ◽  
Mature Analysis

The first record of the amphioxus Branchiostoma californiense on seagrass patches of Halodule wrightii in the Gulf of California is reported. Sixty individuals (19 males, 18 females, and 23 undifferentiated) were collected in May 2017 at Bahía Balandra, Gulf of California, from subtidal seagrass patches at a depth of 0.5 m at low tide. The length and weight ranged from 15.88–28.44 mm and from 0.01–0.11 g for females and 11.7–27.9 mm and 0.01–0.09 g for males, respectively. The minimum size of sexually mature individuals was 11.70 mm for males and 15.88 mm for females; 62% of the specimens were sexually mature. Analysis of the total length-weight relationship suggested an allometric growth pattern among females, males and undifferentiated individuals, whereas an analysis of the entire sample suggested an isometric growth pattern. Typical and additional morphological characters were used to identify the amphioxi. High morphological variability between individuals was found, suggesting the presence of several morphotypes. Branchiostoma californiense had been previously reported as exclusively associated with bare sandy areas, but our study shows that this species can also be found in seagrass patches, using them as breeding and feeding grounds. Thus, seagrass patches are evidenced as suitable habitats for amphioxus.

scholarly journals First record of Glycera guatemalensis and G. sphyrabrancha (Annelida: Glyceridae) from Western Mexico

2019 ◽  
Vol 67 (S5) ◽  
pp. S63-S69
Author(s):  
María Elena García-Garza ◽  
Iliana Torres-Manríquez ◽  
María Ana Tovar-Hernández ◽  
Jesús Angel De León-González
Keyword(s):  
Intertidal Zone ◽  
Gulf Of California ◽  
Baja California ◽  
First Record ◽  
Morphological Characters ◽  
Mexican Pacific ◽  
Western Mexico ◽  
Shrimp Trawl ◽  
The Pacific ◽  
Objective Evidence

Introduction: Glycerides, commonly called “blood worms”, are relatively thin polychaetes that reach considerable sizes. They have been reported for all the seas of the world from the intertidal zone to abyssal depths. Objective: Evidence the presence of two species of Glycera for the littorals of the Mexican Pacific. Methods: An analysis of the glycerides of the Pacific coast of Mexico was carried out, finding two species that were collected, one of shrimp trawl at a depth of 18 meters off Puertecitos, Baja California, as well as by manual sampling in the intertidal zone of Concepción Bay, Baja California Sur in the Gulf of California. For their taxonomic determination, morphological characters of greater relevance for their identification were examined, such as jaws, aileron shape, parapodia, chaetae, and the type of pharyngeal papillae. Results: We diagnosed and schematized Glycera guatemalensis Böggemann & Fiege, 2001 and Glycera sphyrabrancha Schmarda, 1861. Conclusions: Glycera guatemalensis described for Guatemala and Glycera sphyrabrancha described for Jamaica, are recorded for the first time for the Gulf of California.

A new species of Golinca Thomson (Coleoptera: Scarabaeidae: Cetoniinae): first record of the genus for Brazil

Zootaxa ◽  
2015 ◽  
Vol 3919 (1) ◽  
pp. 192
Author(s):  
M. VALOIS ◽  
F. SILVA
Keyword(s):  
New Species ◽  
Male Genitalia ◽  
First Record ◽  
Morphological Characters ◽  
A New Species

Golinca trevisani Valois & Silva, new species (Coleoptera: Scarabaeidae: Cetoniinae: Trichiini: Incina) from Ouro Preto do Oeste, Rondônia, and Amazonas, Brazil is described, representing the first record of the genus Golinca for Brazil. Diagnosis, illustrations of key morphological characters, the first male genitalia description in the genus, and a key for identification of four species of Golinca are provided. 

Taxonomy of the genus Thyonella (Holothuroidea: Dendrochirotida), with mention of the first record of T. sabanillaensis from the southwestern Atlantic Ocean

Zootaxa ◽  
2018 ◽  
Vol 4527 (1) ◽  
pp. 75
Author(s):  
LUCIANA MARTINS
Keyword(s):  
Pacific Ocean ◽  
Atlantic Ocean ◽  
First Record ◽  
Morphological Characters ◽  
Sem Analysis ◽  
Southwestern Atlantic ◽  
Internal Morphology ◽  
The Pacific ◽  
Southwestern Atlantic Ocean ◽  
The Pacific Ocean

The genus Thyonella currently comprises four species which occur in the Atlantic and Pacific Oceans. Thyonella mexicana is the only species known to occur in the Pacific Ocean. The main morphological characters used to distinguish Thyonella species are their dermal ossicles. Since the differences among these characters are subtle, this contribution provides a detailed description and comparison of the ossicle assemblage of the concerned taxa. In addition, description of the internal morphology of three of the concerned species is also provided. Further, this study reports on the first record of Thyonella sabanillaensis for the Southwestern Atlantic. A worldwide revision of the distributional records of Thyonella species is presented and their taxonomy is discussed, concluding that some traditional taxonomic characters should be used cautiously. A brief discussion about the importance of SEM analysis is also provided. 

scholarly journals First record of roving coral grouper Plectropomus pessuliferus (Fowler, 1904) from Saint Martin’s Island, Bangladesh based on Morphology and DNA Barcoding

2021 ◽  
Vol 32 (2) ◽  
pp. 293-301
Author(s):  
MD JAYEDUL ISLAM ◽  
SHARMIN AKTER ◽  
PROVAKOR SARKAR ◽  
MOHAMMAD RASHED ◽  
IREEN PARVIN ◽  
...  
Keyword(s):  
Dna Barcoding ◽  
Bay Of Bengal ◽  
New Record ◽  
First Record ◽  
Morphological Characters ◽  
Marine Waters ◽  
First Report ◽  
Saint Martin ◽  
Northern Bay Of Bengal

A new record of Plectropomus pessuliferus (Serranidae: Epinephelinae) wasdocumented based on morphological characters and DNA barcoding. The species was collectedduring a regular survey for making an inventory of reef associated fishes in Saint Martin`sIsland, Bangladesh. This is the first report of roving coral grouper from the marine waters ofBangladesh validated by morpho-meristic analysis and DNA barcoding. This is also the firstreport from the northern Bay of Bengal.

scholarly journals First Report of Pythium intermedium Causing Root Rot on Rosa canina Rootstock in France

Plant Disease ◽  
2007 ◽  
Vol 91 (8) ◽  
pp. 1055-1055 ◽  
Author(s):  
R. Metzger ◽  
L. Belbahri ◽  
G. Calmin ◽  
N. Badin ◽  
F. Lefort
Keyword(s):  
Root Rot ◽  
Clonal Propagation ◽  
Agar Medium ◽  
First Record ◽  
Morphological Characters ◽  
Rosa Canina ◽  
5.8S Rdna ◽  
Living Material ◽  
Dead Plant ◽  
Typical Soil

Old cultivars of roses (Rosa spp.) established on Rosa canina as rootstock are grown in field collections in the repository at Gaillard in eastern France, close to the Swiss border. During June 2005 and July 2006, several rose plants in full vegetation were severely wilted, leading ultimately to plant death. Necrotic lesions were present on the roots, and marginal tissue was excised and incubated in the dark at 20°C on PARP V8 agar plates (1). Similar isolates were obtained in both years, which were inoculated within 4 days on V8 agar medium and incubated at 25°C. The pathogen colonies grew approximately 30 mm daily on V8 agar. Colonies on corn meal agar (CMA) (1) were submerged, with or without a vague radiate pattern on potato carrot agar. Main hyphae were as much as 7 μm wide. Sporangia and zoospores were not produced. Hyphal swellings as much as 25 μm in diameter were abundant, terminal, and sometimes intercalary, often forming regular, dense chains in basipetal succession at hyphal tips and readily liberated. The morphological characters matched those described for Pythium intermedium (2). DNA sequencing of the ITS rDNA (ITS1, ITS2, and 5.8S rDNA) was generated using primers ITS5 and ITS4 in primary PCR (35 cycles: 96°C for 1 min, 55°C for 1 min, and 72°C for 2 min) and sequencing reactions (1). All isolates yielded identical ITS sequences, which were identical to the ex-type strain of P. intermedium, CBS 266.38 (GenBank Accession No. AY598647). The ITS sequence was deposited as GenBank Accession No. EF078693 (National Center for Biotechnology Information, NCBI, Bethesda, MD). Pathogenicity testing was performed on 3-year-old Rosa canina rootstocks from clonal propagation in 25 cm in diameter and 40 cm deep pots of compost 297 (Ricoter, Aarberg, Switzerland). Five-day-old mycelial plugs of our isolates grown on CMA (1) were inoculated in two pots, and roots were mechanically wounded. Sterile plugs were used on two control plants set aside. All plants were kept for 2 weeks at 20°C in a glasshouse with sufficient watering. Extensive necrotic lesions developed on inoculated roots, and severe wilting and leaves drying out were also observed. The controls showed no symptoms. P. intermedium was reisolated from margins of root lesions, thus fulfilling the postulates of Koch. P. intermedium was originally isolated from dead plant material (2) but is known as a typical soil inhabitant. It also has been isolated from water and living material from numerous plant species, but never from the genus Rosa until now. To our knowledge, this is the first record of P. intermedium on Rosa spp. grafted on Rosa canina in France. References: (1) L. Belbahri et al. FEMS Microbiol Lett 255:209, 2006. (2) A. J. van der Plaats-Niterink. Stud. Mycol. 21:1, 1981.

scholarly journals First Record of Mansonia dyari in the State of Morelos, Mexico, Based on Morphology and COI DNA Barcoding

2020 ◽  
Vol 36 (1) ◽  
pp. 33-36
Author(s):  
Luis F. Hernández-Guevara ◽  
Francisco J. Sánchez-Rámos ◽  
Rahuel J. Chan-Chable ◽  
Luis M. Hernández-Triana ◽  
Ma. Teresa Valdés-Perezgasga ◽  
...  
Keyword(s):  
Cytochrome C ◽  
Dna Barcoding ◽  
Cytochrome C Oxidase ◽  
Mosquito Species ◽  
First Record ◽  
Morphological Characters ◽  
The State ◽  
Historical Records ◽  
Cytochrome C Oxidase I ◽  
Medical Importance

ABSTRACT Collections of mosquitoes were conducted for the surveillance of species of medical importance in the state of Morelos, Mexico, in June 2017. Species collected included Mansonia (Mansonia) dyari, which was identified using morphological characters and cytochrome c oxidase I DNA barcoding. Although 3 species of genus Mansonia have been previously reported in Mexico, this is the 1st confirmed record of Ma. dyari in Morelos State, where no Mansonia species had been recorded. Historical records of Ma. dyari and Ma. indubitans in Mexico were reviewed. Therefore, this record increases the number of mosquito species occurring in Morelos to 46. The specimens collected in this study were deposited in the Culicidae collection of the Universidad Autónoma Agraria Antonio Narro, Unidad Laguna.

scholarly journals Morphological variability of Quercus robur L. leaf in Serbia

Genetika ◽  
2017 ◽  
Vol 49 (2) ◽  
pp. 529-541
Author(s):  
Branislava Batos ◽  
Danijela Miljkovic ◽  
Marko Perovic ◽  
Sasa Orlovic
Keyword(s):  
Leaf Area ◽  
Analysis Of Variance ◽  
Population Differentiation ◽  
Quercus Robur ◽  
Phenotypic Variability ◽  
Morphological Variability ◽  
Intraspecific Variability ◽  
Morphological Characters ◽  
Interpopulation Variability ◽  
Intrapopulation Variability

This paper presents the results of a study dealing with leaf morphological variability of Quercus robur L. 148 trees were sampled from 5 population across Serbia and 17 morphological traits were assessed. Interpopulation variability was confirmed by the results of the analysis of variance (ANOVA). A statistically significant (p <0.05) effect of population was obtained for most of the studied morphological characters. Intrapopulation variability was confirmed by statistically significant tree effects for all of the studied leaf characters (all p < 0.05). The results of the multivariate analysis of variance (MANOVA) confirmed a significant population and tree share in the total phenotypic variability (all p <0.05). By applying the canonical discriminant analysis (CDA), the first discriminant function accounted for 63% of the variability between populations and the second accounted for 20% of the population variability. The leaf area (AREA), specific leaf area (SLA) and surface area to perimeter ratio (ARPE) had the greatest effect on population differentiation (CDA). It is assumed that different environmental conditions affect population differentiation and that high intrapopulation variability is due to intraspecific variability.

scholarly journals A new addition to the alien flora of Tunisia, Amaranthus spinosus L. (Amaranthaceae s.l.), with notes on A. diacanthus Raf.

2019 ◽  
Vol 78 (1) ◽  
pp. 91-94
Author(s):  
Duilio Iamonico ◽  
Ridha El Mokni
Keyword(s):  
National Level ◽  
First Record ◽  
Morphological Characters ◽  
Ecological Data ◽  
Amaranthus Spinosus ◽  
Alien Flora

Abstract Amaranthus spinosus L. (Amaranthaceae s.l.), a species native to the Neotropics, has been found in four localities (Bizerta, Bir Bouregba, Hammamet, and Nabeul) of N. Tunisia. Our discovery represents the first record at national level, and the second one for N. Africa. Morphological characters and ecological data are given. Nomenclatural notes are provided for the name A. diacanthus, which was regarded by some authors as heterotypic synonym of A. spinosus. A neotype is designated in the present paper based on a specimen preserved at LSU.

Earthworm diversity in Rio Grande do Sul, Brazil

Zootaxa ◽  
2018 ◽  
Vol 4496 (1) ◽  
pp. 562 ◽  
Author(s):  
GERUSA PAULI KIST STEFFEN ◽  
RICARDO BEMFICA STEFFEN ◽  
MARIE LUISE CAROLINA BARTZ ◽  
SAMUEL WOOSTER JAMES ◽  
RODRIGO JOSEMAR SEMINOTTI JACQUES ◽  
...  
Keyword(s):  
Species Richness ◽  
Native Species ◽  
Rio Grande ◽  
First Record ◽  
Diversity Indices ◽  
Morphological Characters ◽  
Rio Grande Do Sul ◽  
Earthworm Species ◽  
Aporrectodea Trapezoides ◽  
Native Pastures

The knowledge regarding earthworm species richness in subtropical Brazil is limited, particularly in the state of Rio Grande do Sul (RS), where only a few sites have been sampled. In this study we assessed earthworm richness in different ecosystems of RS, prioritizing un-sampled regions. Fifteen ecosystems, including native vegetation and other ecosystems with variable levels of disturbance were sampled in 30 counties in RS, totaling 77 sampling points, mainly in the Pampa biome. Qualitative sampling was performed by handsorting soil monoliths and fixing the earthworms in 4% formalin solution. Species identification was based on morphological characters, and species richness and Shannon (H) and McIntosh (U) diversity indices were calculated for each ecosystem. Twenty-one earthworm species were identified, belonging to seven families: Glossoscolecidae (8), Rhinodrilidae (2), Ocnerodrilidae (4), Megascolecidae (4), Acanthodrilidae (1), Lumbricidae (1) and Criodrilidae (1). From these, ten are new species belonging to the genera: Glossoscolex (6), Fimoscolex (1), Kerriona (1), Eukerria (1), and one aquatic species of the Criodrilidae family, belonging to a new genus. Most of the native species (Urobenus brasiliensis, Fimoscolex n.sp.1 and the Glossoscolex spp.) predominated in ecosystems little altered by human activity, while exotic (Amynthas gracilis, Amynthas rodericensis, Metaphire californica, Aporrectodea trapezoides) and peregrine species (Pontoscolex corethrurus) predominated in areas with more human disturbance. Native ecosystems with lower disturbance, particularly forests and native pastures had higher diversity than disturbed sites. This is the first record of A. rodericencis for Brazil and most sites represent new collection records for the known species in RS.

scholarly journals Variations in genetic structure and male genitalia suggest recent lineage diversification in the Neotropical dung beetle complex Canthon cyanellus (Scarabaeidae: Scarabaeinae)

2020 ◽  
Vol 131 (3) ◽  
pp. 505-520
Author(s):  
Janet Nolasco-Soto ◽  
Mario E Favila ◽  
Alejandro Espinosa De Los Monteros ◽  
Jorge González-Astorga ◽  
Gonzalo Halffter ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Morphological Variation ◽  
Male Genitalia ◽  
Morphological Variability ◽  
Dung Beetle ◽  
Morphological Characters ◽  
Taxonomic Assignment ◽  
Morphometric Variation ◽  
Evolutionary Forces ◽  
Significant Genetic Structure

Abstract We analysed the genetic divergence and morphology of the aedeagus (i.e. phallobase and parameres) in Canthon cyanellus at different geographical levels. The results from both approaches were compared with the current taxonomic assignment of the C. cyanellus complex, which includes three subspecies. We found a high variation in all the morphological characters of the aedeagus in the populations analysed; the morphometric variation was not geographically structured, either by population or by region. The genealogical analysis indicates a significant genetic structure that does not match either the morphological variation in the male genitalia or the previous subspecific taxonomic classification. Our results suggest that the morphological variation of the aedeagus is seemingly not an isolating reproductive barrier and that the intra- and interpopulation morphological variability of the aedeagus in the C. cyanellus complex does not permit the division into several species. We suggest that other evolutionary forces, such as genetic drift and sexual selection, have influenced the evolution of the male genitalia and the incipient differentiation of this species complex.

Sign in / Sign up

Export Citation Format

Share Document