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DNA-assisted identification of Caulerpa (Caulerpaceae, Chlorophyta) reduces species richness estimates for the Eastern Tropical Pacific
Fernández-García, C.; Wysor, B.; Riosmena-Rodríguez, R.; Peña-Salamanca, E.; Verbruggen, H. (2016). DNA-assisted identification of Caulerpa (Caulerpaceae, Chlorophyta) reduces species richness estimates for the Eastern Tropical Pacific. Phytotaxa 252(3): 185-204. https://dx.doi.org/10.11646/phytotaxa.252.3.2
In: Phytotaxa. Magnolia Press: Auckland. ISSN 1179-3155; e-ISSN 1179-3163, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Bryopsidales [WoRMS]
    Marien/Kust
Author keywords
    Bryopsidales; Central America; Colombia; Costa Rica; DNA-assistedidentification; El Salvador; Mexico; Nicaragua; Panama; phenotypicplasticity; taxonomy; tufA
Auteurs  Top 
  • Fernández-García, C.
  • Wysor, B.
  • Riosmena-Rodríguez, R.
  • Peña-Salamanca, E.
  • Verbruggen, H., meer
Abstract
    Taxonomy and species richness estimates for the genus Caulerpa have proven challenging due to the difficulty of assessing morphological species limits. In the present study we evaluate the taxonomy of the genus and assess species distributions in the Eastern Tropical Pacific (ETP), based on morphology and tufA sequence data. Molecular analyses revealed  six species-level clades: C. verticillata, C. sertularioides, C. cupressoides, C. serrulata, C. racemosa and C. chemnitzia (part of C. racemosa-peltata complex). Our results reduce species richness estimates throughout the ETP by over 54% (from 13 to 6). In accordance with recent studies, our morphological and DNA results warrant the recognition of C. chemnitzia to comprise the morphological entities C. laetevirens, C. peltata and C. vanbossea complex. We continue the use of ecads as a practical identification tool for morphological diversity below the species level present in the ETP. In addition we formally recognize the synonymy of C. racemosa var. macrophysa with the lineage of C. racemosa proposed in recent studies. The six species of Caulerpa found in this study are of pantropical in distribution. Within the ETP region, four species have restricted distributions (C. verticillata, C. cupressoides, C. serrulata, C. racemosa), while two show a wide latitudinal distribution (C. chemnitzia and C. sertularioides).
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