scholarly journals Morphology of the second zoeal stage of Grapsus adscensionis (Osbeck, 1765) (Crustacea, Decapoda, Grapsoidea) confirms larval characters of the family Grapsidae

Zootaxa ◽  
2012 ◽  
Vol 3540 (1) ◽  
pp. 59 ◽  
Author(s):  
JOSÉ MARÍA LANDEIRA ◽  
JOSÉ A. CUESTA
Keyword(s):  
Canary Islands ◽  
Phylogenetic Relationships ◽  
Zoeal Stage ◽  
Larval Morphology ◽  
Ne Atlantic ◽  
Gran Canaria ◽  
The Family ◽  
First Time

The morphology of the second zoeal stage of Grapsus adscensionis, hatched from ovigerous specimens collected in the supralittoral zone of Taliarte Harbour, Gran Canaria (Canary Islands, NE Atlantic), is described and illustrated in detail for the first time. The comparison of its larval morphology with those of other species of Grapsidae provides information for the characterization of the zoeal morphology of grapsids, with implications in the phylogenetic relationships within the family, as well as an aid in identification of plankton samples.

The first zoeal stage of the yellow land crab Johngarthia lagostoma (Milne Edwards, 1837) (Decapoda: Brachyura: Gecarcinidae)

Zootaxa ◽  
2021 ◽  
Vol 4990 (1) ◽  
pp. 192-200
Author(s):  
SIMONE MARIA DE ALBUQUERQUE LIRA ◽  
CYNTHIA DAYANNE MELLO DE LIMA ◽  
IGOR DE ÁVILA TEIXEIRA ◽  
RALF SCHWAMBORN
Keyword(s):  
Phylogenetic Relationships ◽  
Zoeal Stage ◽  
Dorsal Seta ◽  
Tropical Atlantic ◽  
Larval Morphology ◽  
Land Crab ◽  
The Family ◽  
Fernando De Noronha ◽  
Morphological Differences

The objective of this paper is to describe and illustrate the first zoeal stage of the largest land crab of the Tropical Atlantic, Johngarthia lagostoma (Milne Edwards, 1837) (Brachyura: Gecarcinidae). A larval description of J. lagostoma was previously not available. Larvae were obtained from ovigerous females on Rocas Atoll and Fernando de Noronha Archipelago, Brazil. Twenty larvae were randomly chosen to be dissected and described in detail, while 40 others (20 larvae from each island) were measured only. The published description of the congener J. planatus (Stimpson, 1860) larvae was used for a comparison of larval morphology. Some morphological differences between the first zoeal stage of these two species were: The absence or presence of a simple shorter seta on antennule, number of the minute terminal spines on the antenna, setation of the coxal endite of the maxilla, exopod unsegmented of the first and second maxilliped, and a single mid-dorsal seta on first pleonite. These results and differences observed between these species can assist in studies on phylogenetic relationships within the Family Gecarcinidae MacLeay, 1838, as well as in the identification of the larvae of J. Lagostoma in plankton samples from the tropical Atlantic.  

Morphology of the first zoea of Chaceon affinis (A. Milne-Edwards & Bouvier, 1894) and occurrence of Chaceon spp. larvae (Decapoda: Brachyura: Gerynonidae) in the Canary Islands waters, Northeastern Atlantic

Zootaxa ◽  
2018 ◽  
Vol 4413 (3) ◽  
pp. 579
Author(s):  
JOSÉ M. LANDERIA ◽  
HIROAKI TAMURA
Keyword(s):  
Canary Islands ◽  
Reproductive Strategies ◽  
Fishery Management ◽  
Temporal Distribution ◽  
Larval Abundance ◽  
Ne Atlantic ◽  
Morphological Comparison ◽  
Gran Canaria ◽  
First Time ◽  
Northeastern Atlantic

The morphology of the first zoea stage of Chaceon affinis is described and illustrated in detail for the first time. Morphological comparison with the corresponding stage of other known species of Geryonidae allowed the differentiation between the genera Chaceon and Geryon, although it was impossible to distinguish among species of Chaceon using larval morphology. Thus, geryonid larvae collected in the plankton of Gran Canaria Island, NE Atlantic, during the years 2005 and 2006, could only be identified as Chaceon spp. The temporal distribution of larval abundance suggested that main hatching periods of Chaceon spp. occur in spring and summer. These results are useful to better understand the reproductive strategies of these deep-water crabs, which in turn will be useful for future fishery management of this resource of increasing interest in the Canary Islands. 

Larval morphology of the diving beetle Celina and the phylogeny of ancestral hydroporines (Coleoptera:Dytiscidae:Hydroporinae)

2007 ◽  
Vol 21 (3) ◽  
pp. 239 ◽  
Author(s):  
Mariano C. Michat ◽  
Yves Alarie ◽  
Patricia L. M. Torres ◽  
Yoandri S. Megna
Keyword(s):  
Phylogenetic Relationships ◽  
Cladistic Analysis ◽  
Sister Group ◽  
Reduced Form ◽  
Larval Morphology ◽  
Unique Character ◽  
Phylogenetic Studies ◽  
Diving Beetles ◽  
The Family ◽  
First Time

Phylogenetic relationships within diving beetles (Dytiscidae) are imperfectly known. In particular, some authors have considered that the tribe Methlini is included in the subfamily Hydroporinae (a large group including about half of the dytiscid species worldwide), whereas others have argued in favour of excluding Methlini from the Hydroporinae and giving it subfamilial rank. Larval characters have been underutilised in phylogenetic studies, mainly because the larvae of many taxa within the family are still unknown. The larval morphology of the dytiscid tribe Methlini, in particular, remains poorly known. In this study, the phylogenetic relationships among ancestral lineages of the Hydroporinae are investigated based on a cladistic analysis of 34 taxa and 127 morphological larval characters. For this purpose, larvae of the Methlini (Celina parallela (Babington, 1841)) and C. imitatrix Young, 1979) are described and illustrated in detail for the first time, with particular emphasis on morphometry and chaetotaxy. The results show high support for a monophyletic origin of the Hydroporinae, including Methlini, based on eight unique character states. Giving Methlini subfamily rank would leave Hydroporinae with a single unique larval apomorphy. This supports the inclusion of Methlini as a tribe of Hydroporinae. Other interesting but less well supported results include: 1, the clade Laccornini + Hydrovatini + Canthyporus Zimmermann, 1919 (Hydroporini) resolved as the sister-group to the other Hydroporinae minus Methlini; and 2, Hydrovatini and Canthyporus resolved as sister-groups. The presence of a galea, albeit in a reduced form, in larvae of Methlini, Laccornini and Hydrovatini is of the utmost interest. The putative hypothesis of an ancestral position for these genera within Hydroporinae suggests that hydroporines lost the galea secondarily.

scholarly journals Seasonality of planktonic crustacean decapod larvae in the subtropical waters of Gran Canaria Island, NE Atlantic

2018 ◽  
Vol 82 (2) ◽  
pp. 119 ◽  
Author(s):  
José M. Landeira ◽  
Fernando Lozano-Soldevilla
Keyword(s):  
Canary Islands ◽  
Temporal Dynamics ◽  
Larval Abundance ◽  
Ne Atlantic ◽  
Crangon Crangon ◽  
Subtropical Region ◽  
Larval Release ◽  
Gran Canaria ◽  
Release Times ◽  
Decapod Larvae

A monitoring programme was established to collect plankton samples and information of environmental variables over the shelf off the island of Gran Canaria during 2005 and 2006. It produced a detailed snapshot of the composition and seasonal assemblages of the decapod larvae community in this locality, in the subtropical waters of the Canary Islands (NE Atlantic), where information about crustacean phenology has been poorly studied. The larval community was mainly composed of benthic taxa, but the contribution of pelagic taxa was also significant. Infraorders Anomura (33.4%) and Caridea (32.8%) accounted for more than half the total collected larvae. High diversity, relatively low larval abundance throughout the year and weak seasonality characterized the annual cycle. However, in relation to the temporal dynamics of temperature, two distinct larval assemblages (cold and warm) were identified that correspond to periods of mixing and stratification of the water column. The results also indicate that larval release times and durations in the subtropical waters are earlier and longer than at other higher latitudes in the NE Atlantic. We detected the presence of larvae of six species that have not yet been reported from the Canary Islands (Pandalina brevirostris, Processa edulis, Necallianasa truncata, Parapenaeus longirostris, Crangon crangon, Nematopagurus longicornis). Finally, this study provides a baseline for future comparisons with respect to fishery pressure and climate variability in this subtropical region.

scholarly journals Molecular Characterization of a Begomovirus and Betasatellite Causing Yellow Vein Net Disease of Ageratum houstonianum

Plant Disease ◽  
2015 ◽  
Vol 99 (5) ◽  
pp. 627-631 ◽  
Author(s):  
Ashish Srivastava ◽  
Susheel Kumar ◽  
Shri Krishna Raj
Keyword(s):  
Sequence Analysis ◽  
Sequence Homology ◽  
Phylogenetic Relationships ◽  
Disease Incidence ◽  
Open Reading Frames ◽  
Yellow Vein ◽  
Full Length Genome ◽  
First Time ◽  
Leaf Curl

Ageratum houstonianum was introduced in India as an annual ornamental plant and is grown in beds for blue head flowers. Yellow vein net disease was observed on A. houstonianum plants with about 9.0% disease incidence during a survey in February 2012 at gardens of NBRI, Lucknow, India. Association of a begomovirus and betasatellite with the disease was characterized based on sequence analyses of their cloned full length genome isolated from diseased A. houstonianum. Sequence analysis of the begomovirus showed presence of the six open reading frames in its genome, similar to the arrangement of Old World begomoviruses. The begomoviral genome shared 95 to 97% sequence identities with various strains of Ageratum enation virus (AEV); however, it showed distinct phylogenetic relationships with them, and hence was identified as a variant of AEV based on more than 94% sequence homology, the criteria defined by ICTV. The sequence analysis of associated betasatellite revealed highest 93% sequence identity and close phylogenetic relationships with Ageratum leaf curl betasatellite (ALCB) molecules; therefore, it was identified as an isolate of ALCB (based on 93% sequence homology). Agroinfiltration of partial dimers of the AEV variant and ALCB induced similar systemic yellow vein net and leaf curl symptoms on A. houstonianum when infiltrated in combination, fulfilling Koch’s postulates. Characterization of AEV and ALCB causing yellow vein net disease of A. houstonianum is being reported for the first time.

scholarly journals Characterization of the complete genomes of Camelus dromedarius papillomavirus types 1 and 2

2011 ◽  
Vol 92 (8) ◽  
pp. 1769-1777 ◽  
Author(s):  
A. E. Ure ◽  
A. K. Elfadl ◽  
A. I. Khalafalla ◽  
A. A. R. Gameel ◽  
J. Dillner ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Diagnostic Methods ◽  
Camelus Dromedarius ◽  
Bovine Papillomavirus ◽  
Lower Jaw ◽  
The Family ◽  
Complete Genomes ◽  
First Time

Camel papillomatosis has been described previously, but the genome of the suspected papillomavirus (PV) has not been identified. An outbreak of papillomatosis occurred in a dromedary farm of 55 animals in Sudan during August 2009. The disease was only present in young animals aged about 3–7 months, of which 44 % (11/25) were affected with lesions, mainly on the lips and lower jaw. This study reports for the first time the complete genomes of Camelus dromedarius papillomavirus types 1 (CdPV1) and 2 (CdPV2), isolated from a cauliflower-like nodule and a round oval raised nodule, respectively. Pairwise comparisons of their L1 nucleotide sequences revealed 69.2 % identity, and phylogenetic analyses suggested that these two PV types are grouped within the genus Deltapapillomavirus. Both viruses were isolated from fibropapillomas, although no putative E5 proteins homologous to that of bovine papillomavirus type 1 were identified. The genetic information will be useful for evolutionary studies of the family Papillomaviridae, as well as for the development of diagnostic methods for surveillance of the disease in dromedaries.

scholarly journals The Relaxase of the Rhizobium etli Symbiotic Plasmid Shows nic Site cis-Acting Preference

2006 ◽  
Vol 188 (21) ◽  
pp. 7488-7499 ◽  
Author(s):  
Daniel Pérez-Mendoza ◽  
María Lucas ◽  
Socorro Muñoz ◽  
José A. Herrera-Cervera ◽  
José Olivares ◽  
...  
Keyword(s):  
Biochemical Characterization ◽  
Rhizobium Etli ◽  
Cis Acting ◽  
Cleavage Activity ◽  
Symbiotic Plasmid ◽  
The Family ◽  
Nick Site ◽  
First Time

ABSTRACT Genetic and biochemical characterization of TraA, the relaxase of symbiotic plasmid pRetCFN42d from Rhizobium etli, is described. After purifying the relaxase domain (N265TraA), we demonstrated nic binding and cleavage activity in vitro and thus characterized for the first time the nick site (nic) of a plasmid in the family Rhizobiaceae. We studied the range of N265TraA relaxase specificity in vitro by testing different oligonucleotides in binding and nicking assays. In addition, the ability of pRetCFN42d to mobilize different Rhizobiaceae plasmid origins of transfer (oriT) was examined. Data obtained with these approaches allowed us to establish functional and phylogenetic relationships between different plasmids of this family. Our results suggest novel characteristics of the R. etli pSym relaxase for previously described conjugative systems, with emphasis on the oriT cis-acting preference of this enzyme and its possible biological relevance.

scholarly journals Plumularioid hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program

2020 ◽  
Author(s):  
Horia R. Galea ◽  
Davide Maggioni
Keyword(s):  
Deep Sea ◽  
Genetic Characterization ◽  
New Caledonia ◽  
Valid Species ◽  
Western Coast ◽  
New Genera ◽  
Phylogenetic Reconstructions ◽  
The Family ◽  
First Time

This study reports on 25 species of hydroids occurring in the collections gathered during KANACONO and KANADEEP expeditions carried out in the SE of New Caledonia in 2016, and off the western coast of the island in 2017, respectively. Of these, 19 have not been dealt with in earlier reports on these collections. Two new genera and four new species are described, viz, Actinopluma mirifica Galea gen. et sp. nov., provisionally assigned to the family Kirchenpaueriidae Stechow, 1921, Schizoplumularia helicoidalis sp. nov., belonging to the Plumulariidae McCrady, 1859, and Corhiza patula Galea sp. nov. and Thamnopteros uniserius Galea gen. et sp. nov., both placed in the family Halopterididae Millard, 1962. The gonotheca and the medusoid gonophore of Plumularia contraria Ansín Agís et al., 2014 are described for the first time, allowing a genus transfer to Dentitheca Stechow, 1919, as D. contraria comb. nov. Plumularia conjuncta Billard, 1913, known earlier from a minute portion of colony, is redescribed based on a complete, though infertile, specimen. Similarly, complete specimens corresponding to the hydroid previously referred to as Antennella megatheca Ansín Agís et al., 2009 are documented, allowing a provisional reallocation to Corhiza Millard, 1962 and a description of its so far unknown gonothecae. Fertile material assignable to the poorly-known Monostaechas fisheri Nutting, 1905 allows the recognition of this hydroid as a valid species, distinct from M. quadridens (McCrady, 1859). Most taxa are illustrated to validate the reliability of their identifications. Finally, phylogenetic reconstructions of the families Aglaopheniidae, Plumulariidae, and Halopterididae, based on the 16S rRNA, allowed a first genetic characterization of some of the species dealt with in this work.

Revisited phylogeny of Bethylinae (Hymenoptera, Bethylidae) solves basal polytomy

2020 ◽  
Vol 51 (3) ◽  
pp. 296-346
Author(s):  
Magno S. Ramos ◽  
Celso O. Azevedo
Keyword(s):  
Phylogenetic Analysis ◽  
Phylogenetic Relationships ◽  
Morphological Characters ◽  
Female Characters ◽  
Wing Morphology ◽  
Male And Female ◽  
Strongly Convex ◽  
The Family ◽  
Males And Females ◽  
First Time

Bethylinae are a morphologically well-defined subfamily of Bethylidae, with remarkable characters, such as strongly convex clypeal carina and bifid and angled tarsal claws. However, there is no consensus about the phylogenetic relationships among the genera within the family, regarding mainly Eupsenella and Lytopsenella. To resolve this problem, a phylogeny of the Bethylinae is inferred based on parsimony analyses separately of 43 and 44 morphological characters for males and females, respectively. We performed combined analyses of both sexes with 49 morphological characters, including genitalia. We present a phylogenetic analysis, including a total 118 species of Bethylinae. Male and female characters were included in these analyses. We discuss wing morphology and deformability of forewings for the first time. In summary, the basal polytomy was solved for the first time. Seven of the eight genera were recovered as monophyletic groups. The unique exception is Goniozus, which was retrieved as paraphyletic in all topologies.

scholarly journals A revision of the genus Atomopria Kieffer, 1910 (Hymenoptera Diaprioidea Diapriidae)

2016 ◽  
pp. 99-114
Author(s):  
Achille Casale
Keyword(s):  
New Species ◽  
Canary Islands ◽  
North Africa ◽  
Male Genitalia ◽  
Morphological Features ◽  
Gran Canaria ◽  
First Time ◽  
North Western

The genus Atomopria Kieffer, 1911 currently includes two only described species: A. fulvicornis Kieffer, 1911, from north-western Italy (Liguria) and A. rufithorax Kieffer, 1911, from Tunisia (Tunis). The following ten new species are described from North Africa and Canary Islands: A. helenae n. sp. (Algeria, Kabylia), A. giachinoi n. sp. (Algeria, Kabylia), A. lisae n. sp. (Algeria, Kabylia), A. olmii n. sp. (Canary Islands, Gran Canaria), A. ortegae n. sp. (Canary Islands, Tenerife), A. boffai n. sp. (Canary Islands, Tenerife), A. cavazzutii n. sp. (Canary Islands, Tenerife), A. longicornis n. sp. (Canary Islands, Tenerife), A. paglianoi n. sp. (Canary Islands, Tenerife), A. scaramozzinoi n. sp. (Canary Islands, Tenerife). Diagnostic morphological features of representatives of this genus are described; male genitalia of some species are illustrated for the first time. The synonymy of the genus Atomopria with Basalys Westwood, 1832 is also hypothesized, but not proposed in this contribution. A key for identification of all species is provided, both for females and males. Finally, some taxonomic and biogeographic questions are briefly debated.

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