Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in Argentina
Abstract Lichens are symbiotic organisms, usually composed of a fungal partner, the mycobiont, and one or more photosynthetic partners, the photobiont, which is most often either a green alga or a cyanobacterium, that harbor a diverse community of invertebrates such as rotifers, tardigrades, mites,...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2024-01-01
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| Series: | Papéis Avulsos de Zoologia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492023000100242&tlng=en |
| _version_ | 1797361173415329792 |
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| author | José Matías Rusconi Renato García Augusto Salas Darío Balcazar Marina Ibáñez Shimabukuro María Fernanda Achinelly |
| author_facet | José Matías Rusconi Renato García Augusto Salas Darío Balcazar Marina Ibáñez Shimabukuro María Fernanda Achinelly |
| author_sort | José Matías Rusconi |
| collection | DOAJ |
| description | Abstract Lichens are symbiotic organisms, usually composed of a fungal partner, the mycobiont, and one or more photosynthetic partners, the photobiont, which is most often either a green alga or a cyanobacterium, that harbor a diverse community of invertebrates such as rotifers, tardigrades, mites, springtails, crustaceans, and nematodes. In this work, we isolated the nematode Geraldius galapagoensis (Chambersiellidae) associated with the lichen Hyperphyscia syncolla (Physciaceae) in a region of Buenos Aires Province, Argentina. This species was discovered in a tropical forest of Ecuador and is characterized mainly by a head offset by a constriction from the rest of the body, a esophagus with a cylindrical pharyngeal corpus without a median bulb, a narrow isthmus and an oval basal pharyngeal bulb with strong transverse/butterfly valve apparatus, a tail curved ventrally, ending in dorsally hooked end; the male with seven pairs of latero-ventral pre-anal papillae and three pairs of post-anal in the following positions: one pair latero-ventral and two pairs dorso-lateral and two slightly curved spicules with asymmetric manubrium with an anterior extension. The comparison of the morphometrics of our G. galapagoensis male with that of the original description shows that the body length is shorter, as are the distance of the excretory pore to the anterior end and the tail. On the other hand, the distance from the anterior end to the nerve ring and the esophagus length are greater. The head width, body diameter and spicule length are quite similar. We provide a morphological and morphometrical characterization of a G. galapagoensis second isolate and the first world report of molecular sequences belonging to this species. |
| first_indexed | 2024-03-08T15:50:08Z |
| format | Article |
| id | doaj.art-c87860d8e6ba47b3a4b4a12d311a9efd |
| institution | Directory Open Access Journal |
| issn | 1807-0205 |
| language | English |
| last_indexed | 2024-03-08T15:50:08Z |
| publishDate | 2024-01-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Papéis Avulsos de Zoologia |
| spelling | doaj.art-c87860d8e6ba47b3a4b4a12d311a9efd2024-01-09T07:39:21ZengUniversidade de São PauloPapéis Avulsos de Zoologia1807-02052024-01-016310.11606/1807-0205/2023.63.042Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in ArgentinaJosé Matías Rusconihttps://orcid.org/0000-0002-9631-5546Renato Garcíahttps://orcid.org/0000-0002-6040-2250Augusto Salashttps://orcid.org/0000-0002-8422-0435Darío Balcazarhttps://orcid.org/0000-0002-8490-7683Marina Ibáñez Shimabukurohttps://orcid.org/0000-0002-8612-3057María Fernanda Achinellyhttps://orcid.org/0000-0003-2363-6661Abstract Lichens are symbiotic organisms, usually composed of a fungal partner, the mycobiont, and one or more photosynthetic partners, the photobiont, which is most often either a green alga or a cyanobacterium, that harbor a diverse community of invertebrates such as rotifers, tardigrades, mites, springtails, crustaceans, and nematodes. In this work, we isolated the nematode Geraldius galapagoensis (Chambersiellidae) associated with the lichen Hyperphyscia syncolla (Physciaceae) in a region of Buenos Aires Province, Argentina. This species was discovered in a tropical forest of Ecuador and is characterized mainly by a head offset by a constriction from the rest of the body, a esophagus with a cylindrical pharyngeal corpus without a median bulb, a narrow isthmus and an oval basal pharyngeal bulb with strong transverse/butterfly valve apparatus, a tail curved ventrally, ending in dorsally hooked end; the male with seven pairs of latero-ventral pre-anal papillae and three pairs of post-anal in the following positions: one pair latero-ventral and two pairs dorso-lateral and two slightly curved spicules with asymmetric manubrium with an anterior extension. The comparison of the morphometrics of our G. galapagoensis male with that of the original description shows that the body length is shorter, as are the distance of the excretory pore to the anterior end and the tail. On the other hand, the distance from the anterior end to the nerve ring and the esophagus length are greater. The head width, body diameter and spicule length are quite similar. We provide a morphological and morphometrical characterization of a G. galapagoensis second isolate and the first world report of molecular sequences belonging to this species.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492023000100242&tlng=enNematodesHyperphyscia syncollaPycnidiaMolecular analysisEco Area |
| spellingShingle | José Matías Rusconi Renato García Augusto Salas Darío Balcazar Marina Ibáñez Shimabukuro María Fernanda Achinelly Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in Argentina Papéis Avulsos de Zoologia Nematodes Hyperphyscia syncolla Pycnidia Molecular analysis Eco Area |
| title | Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in Argentina |
| title_full | Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in Argentina |
| title_fullStr | Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in Argentina |
| title_full_unstemmed | Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in Argentina |
| title_short | Morphological and molecular characterization of Geraldius galapagoensis (Nematoda: Chambersiellidae) associated with lichens in Argentina |
| title_sort | morphological and molecular characterization of geraldius galapagoensis nematoda chambersiellidae associated with lichens in argentina |
| topic | Nematodes Hyperphyscia syncolla Pycnidia Molecular analysis Eco Area |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492023000100242&tlng=en |
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