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Distribution patterns of three new species of Paradoneis (Annelida: Paraonidae) from the southern Gulf of Mexico, with a dichotomous key for the Grand Caribbean species
Quintanar-Retama, O.; Hernandez-Alcantara, P.; Solis-Weiss, V. (2019). Distribution patterns of three new species of Paradoneis (Annelida: Paraonidae) from the southern Gulf of Mexico, with a dichotomous key for the Grand Caribbean species. Mar. Biodiv. 49(6): 2851-2870. https://dx.doi.org/10.1007/s12526-019-01014-1
In: Marine Biodiversity. Springer: Heidelberg; Berlin. ISSN 1867-1616; e-ISSN 1867-1624, meer
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| Trefwoorden |
Paradoneis Hartman, 1965 [WoRMS]; Polychaeta [WoRMS]
Marien/Kust |
| Author keywords |
Polychaeta; Paraonids; Habitat; Taxonomic key; Continental shelf |
| Auteurs | | Top |
- Quintanar-Retama, O.
- Hernandez-Alcantara, P.
- Solis-Weiss, V., meer
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| Abstract |
Three species of Paradoneis are newly described from the southern Gulf of Mexico, based on 173 sediment samples collected during six oceanographic expeditions. Their habitats and distribution patterns are also analyzed. They belong to the Paradoneis group with three prebranchial segments and lyrate notopodial chaetae. Paradoneis campechensis sp. nov. has lyrate chaetae along the whole body, a half-moon-shaped fold on the posterior region of the prostomium, 12 to 15 pairs of short branchiae, and small prebranchial notopodial postchaetal lobes; it was mainly found in front of Terminos Lagoon, more abundant in the outer shelf during the dry season and in mixed and muddy terrigenous sediments. Paradoneis mexicanensis sp. nov. is characterized by two types of lyrate notochaetae: those in the branchial region with their distal part longer and thin inner teeth, and those in the postbranchial region shorter, stouter, with inner teeth stouter, and with 10 to15 pairs of branchiae slightly longer than the segments width; it was mostly collected in the western Gulf, mainly in mixed carbonate sediments, and generally at less than 50 m depth. Paradoneis yucatanensis sp. nov. is part of a small group of presumably paedomorphic species, characterized by a low number of short branchiae (4 to 5 pairs) and a thin body with short prebranchial notopodial postchaetal lobes; its occurrence was restricted to the western Gulf, in muddy and sandy carbonate bottoms from shallow depths. A taxonomic key of all Paradoneis species known from the Grand Caribbean region is included. |
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