A new species of Rochefortia (Ehretiaceae, Boraginales) from the Lesser Antilles

Irimia, Ramona-Elena; Gottschling, Marc

doi:10.11646/phytotaxa.236.1.5

Cited by 2 publications

(4 citation statements)

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“…The Caribbean group comprising 7 species constitutes the sister group of the two joint mainland species. Within the Caribbean species group, R. barloventensis is largely restricted to the Lesser Antilles (Irimia and Gottschling 2015), whereas R. acanthophora mainly occurs on the eastern Greater Antilles. The remaining 5 species are distributed over The Bahamas, Cuba and Jamaica (but phylogenetic resolution within that clade is poor).…”

Section: Methodsmentioning

confidence: 99%

“…Rochefortia barloventensis was discovered as a species new to science in the course of the present revision of Rochefortia (Irimia and Gottschling 2015). With respect to leaf shapes and sizes, it is a morphologically variable species and is intermediate between R. bahamensis and R. cuneata exhibiting mature leaves size greater than 3.5 cm (and up to 6.0 cm) long in some specimens from Guadeloupe, Martinique and Puerto Rico.…”

Section: Taxon Treatmentsmentioning

confidence: 99%

“…acanthophora : Gürke 1893, Liogier de Sereys Allut 1995; Gürke 1893R. barloventensis Irimia & Gottschling: Irimia and Gottschling 2015; R. lundellii : Standley and Williams 1970; R.…”

Section: Introductionmentioning

confidence: 99%

“…Filaments are flattened, which is another unusual character within Ehretiaceae (Lefor 1968). The ovary in male flowers is conical, choricarpous to symplicate at the base and proceeds apically into two rudimentary stylodia (Irimia and Gottschling 2015). The adaxial surface of the stylodia is strigose.…”

Section: Introductionmentioning

confidence: 99%

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Taxonomic revision of Rochefortia Sw. (Ehretiaceae, Boraginales)

Irimia¹,

Gottschling²

2016

BDJ

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BackgroundRochefortia is a small taxon of woody plants in the Ehretiaceae (Boraginales) exhibiting coriaceous leaves with cystoliths, small whitish flowers and drupaceous fruits containing four pyrenes. It shares the dioecious sex distribution with its sister group Lepidocordia and can be delimited from the latter (and all other Ehretiaceae) by the presence of thorns. Neotropical Rochefortia is distributed over most Caribbean islands, Central America and northern South America. Twenty-eight validly published names (corresponding to twenty-one typified taxa at the species level and below) are available in Rochefortia, but the precise number of species to be accepted has been elusive before this revision.New informationIn the course of the present revision, 353 herbarium collections, comprising approximately 540 Rochefortia specimens, were entried into a BRAHMS data base providing information about protologues and types and retrospective georeferences if possible. Based on the combination of molecular and morphological data we propose to recognise nine species of Rochefortia, namely R. acanthophora, R. bahamensis, R. barloventensis, R. cubensis, R. cuneata, R. lundellii, R. oblongata, R. spinosa and R. stellata (the remaining nineteen validly published names are synonymised under such names). Morphological description of each species and an identification key are provided.

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Section: Methodsmentioning

confidence: 99%

Section: Taxon Treatmentsmentioning

confidence: 99%

“…acanthophora : Gürke 1893, Liogier de Sereys Allut 1995; Gürke 1893R. barloventensis Irimia & Gottschling: Irimia and Gottschling 2015; R. lundellii : Standley and Williams 1970; R.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Taxonomic revision of Rochefortia Sw. (Ehretiaceae, Boraginales)

Irimia¹,

Gottschling²

2016

BDJ

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A Return to Linnaeus’s Focus on Diagnosis, Not Description: The Use of DNA Characters in the Formal Naming of Species

Renner¹

2016

Syst Biol

107

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Descriptions and diagnoses are alternative choices in all Codes of Nomenclature because Linnaeus relied on diagnoses, not descriptions, to name ca. 13,400 animals, plants, and fungi. A diagnosis names characters in which a new taxon differs from the most similar known taxon; a description mixes taxonomically informative and uninformative features, usually without indicating which is which. The first formal diagnoses of new taxa that included DNA-based characters came out in 2001, and by November 2015, at least 98 names of species of acoels, lichens, angiosperms, annelids, alveolates, arachnids, centipedes, turtles, fishes, butterflies, mollusks, nematodes, and pathogenic fungi have been published based on diagnostic mitochondrial, plastid, or nuclear DNA substitutions, indels, or rarely genetic distances, with or without additional morphological features. Authors have found diverse ways to specify the diagnostic traits (all published studies are here tabulated). While descriptions try to "cover" within-species variation, a goal rarely accomplished because of (i) the stochastic nature of specimen availability (thousands of species are known from single collections) and (ii) the subjective circumscription of species, the purpose of diagnoses was and is speedy identification. Linnaeus tried to achieve this by citing images, geographic occurrence, and previous literature. The renewed attention to sharp diagnosis now coincides with worldwide barcoding efforts, may speed up formal naming, and matches the increasing reliance on DNA for both classification and identification. I argue for DNA-based diagnoses of new species becoming a recommendation in all Codes, not just the bacterial code. [Codes of Nomenclature; description; diagnosis; DNA-based diagnosis; naming new species; nomenclature.

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A new species of Rochefortia (Ehretiaceae, Boraginales) from the Lesser Antilles

Cited by 2 publications

References 1 publication

Taxonomic revision of Rochefortia Sw. (Ehretiaceae, Boraginales)

Taxonomic revision of Rochefortia Sw. (Ehretiaceae, Boraginales)

A Return to Linnaeus’s Focus on Diagnosis, Not Description: The Use of DNA Characters in the Formal Naming of Species

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