Description of six new species of Mesonerilla (Nerillidae, Annelida) and an emended description of M. intermedia Wilke, 1953, from marine and cave environments
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Description of six new species of Mesonerilla (Nerillidae, Annelida) and an emended description of M. intermedia Wilke, 1953, from marine and cave environments. / Worsaae, Katrine; Mikkelsen, Maria Damsgaard; Martínez, Alejandro.
I: Marine Biodiversity, Bind 49, Nr. 5, 2019, s. 2141-2165.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Description of six new species of Mesonerilla (Nerillidae, Annelida) and an emended description of M. intermedia Wilke, 1953, from marine and cave environments
AU - Worsaae, Katrine
AU - Mikkelsen, Maria Damsgaard
AU - Martínez, Alejandro
PY - 2019
Y1 - 2019
N2 - Nerillidae is a species-rich family of meiofaunal, mainly interstitial annelids. The genus Mesonerilla previously contained eight described species. We here describe six new species of Mesonerilla based on detailed morphological light and scanning electron microscopy studies. The new species were collected from coastal subtidal and tidal sediments, as well as from anchialine caves, in the Mediterranean, Canary Islands, Panamá, Trinidad and Tobago and the USA. All species of Mesonerilla contain nine segments, two-three antennae, two club-shaped palps, parapodial cirri and compound chaetae in most segments. New species are diagnosed by unique character traits and/or a unique combination of characters involving differences in shape of appendages, reproductive characters and glandular and ciliary patterns. Their validation is further supported by a molecular phylogeny including these and the majority of described species of Mesonerilla. With most of the diagnostic characters of the described species being hardly discernible, and with potential additional molecular identifiable species left undescribed, the genus Mesonerilla, as many other interstitial groups, show a high degree of cryptic diversity.
AB - Nerillidae is a species-rich family of meiofaunal, mainly interstitial annelids. The genus Mesonerilla previously contained eight described species. We here describe six new species of Mesonerilla based on detailed morphological light and scanning electron microscopy studies. The new species were collected from coastal subtidal and tidal sediments, as well as from anchialine caves, in the Mediterranean, Canary Islands, Panamá, Trinidad and Tobago and the USA. All species of Mesonerilla contain nine segments, two-three antennae, two club-shaped palps, parapodial cirri and compound chaetae in most segments. New species are diagnosed by unique character traits and/or a unique combination of characters involving differences in shape of appendages, reproductive characters and glandular and ciliary patterns. Their validation is further supported by a molecular phylogeny including these and the majority of described species of Mesonerilla. With most of the diagnostic characters of the described species being hardly discernible, and with potential additional molecular identifiable species left undescribed, the genus Mesonerilla, as many other interstitial groups, show a high degree of cryptic diversity.
KW - Anchialine fauna
KW - Interstitial
KW - Meiofauna
KW - Microscopy
KW - Molecular phylogeny
U2 - 10.1007/s12526-019-00984-6
DO - 10.1007/s12526-019-00984-6
M3 - Journal article
AN - SCOPUS:85074498628
VL - 49
SP - 2141
EP - 2165
JO - Marine Biodiversity
JF - Marine Biodiversity
SN - 1867-1616
IS - 5
ER -
ID: 230743151