A tribal classification of the <i>Periplocoideae (Apocynaceae)</i>

Venter, H.J.T.; Verhoeven, R.L.

doi:10.2307/1224476

Cited by 34 publications

(23 citation statements)

References 17 publications

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“…Since most genera in the Periplocoideae are mono-or ditypic, this study successfully assessed the relationships among many of these smaller genera. Their findings did not corroborate the tribal arrangement of Venter & Verhoeven (1997). Major findings of Ionta & Judd's study were: (1) a previously undetected grouping, characterised by a longitudinal groove through the spoon-shaped translator; (2) the phenomenon of pollen gathered into pollinia evolved several times within the subfamily, all of them within this "Grooved Translator-clade"; (3) Phyllanthera grayi (P.I.Forst.)…”

Section: Introductionmentioning

confidence: 87%

“…Historically genera within the Periplocoideae were mainly defined by floral features: with the depth of the corolla tube, the degree of exposure of the gynostegium and the relative positions of the stamens and coronal lobes in the tube regarded as particularly important (Brown, 1902(Brown, -19031907-1909. Venter & Verhoeven (1997) used these characters to divide the Periplocoideae into three tribes, but these tribes were not supported in a subsequent cladistic analysis of morphological characters (Venter & Verhoeven, 2001).…”

Section: Introductionmentioning

confidence: 99%

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A widespread radiation in the Periplocoideae (Apocynaceae): The case of Cryptolepis

Joubert

Klak

Venter

et al. 2016

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Cryptolepis is the second‐largest genus in the Periplocoideae with 30 species. It is the most widely distributed genus in the subfamily and occupies a wide range of habitats, from moist forests to stony semi‐deserts. Analyses of DNA‐data revealed that Cryptolepis is paraphyletic and, for monophyly to prevail, Parquetina should be included in Cryptolepis. Most of the species fall into two major clades: one confined to NE Africa and neighbouring areas; the other absent from NE Africa but widely distributed from West to South Africa. Most species of Cryptolepis from the more arid areas are shrubby, often with reduced leaves and often with much reduced, few‐flowered inflorescences. We establish that Cryptolepis arose about 21 million years ago and began its major radiation around 16 million years ago. Despite this age and its wide distribution, it has not diversified significantly, perhaps limited in the more arid regions by the absence of succulence. It is also possible that the relatively uniform floral structure also limited its response to the diversity of pollinators. Although most species of Cryptolepis are African, there are three species in SE Asia. We show that these three SE Asian species are nested among African taxa and are likely to have reached SE Asia by long‐distance dispersal.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

A widespread radiation in the Periplocoideae (Apocynaceae): The case of Cryptolepis

Joubert

Klak

Venter

et al. 2016

TAXON

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“…Endress & Bruyns () added more information regarding morphological characters and stated that there is little support from morphology for raising Periplocoideae to subfamily status apart from the rest of asclepiads, as previously suggested by Bruyns (). Endress & Bruyns () also abandoned the tribal classification of the subfamily of Venter & Verhoeven (), a decision subsequently supported by molecular analysis (Potgieter & Albert, ).…”

Section: Periplocoideaementioning

confidence: 99%

The taxonomy and systematics of Apocynaceae: where we stand in 2012

et al. 2013

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In their most recent classification of Apocynaceae in 2000, Endress and Bruyns recognized five subfamilies of Apocynaceae (Rauvolfioideae, Apocynoideae, Periplocoideae, Secamonoideae and Asclepiadoideae). Subsequently, through various studies using molecular data, it has been shown that most tribes and subtribes of Rauvolfioideae were not monophyletic, and new tribes and subtribes have been erected to reflect improved phylogenetic understanding of the family: Aspidospermeae in Rauvolfioideae; Nerieae, Odontadenieae and Baisseeae in Apocynoideae; Fockeeae in Asclepiadoideae; and Orthosiinae in Asclepiadeae. Several genera in Rauvolfioideae have been reassigned to different tribes in order to improve the monophyly of these tribes. The sister group of Asclepiadoideae plus Secamonoideae is not Periplocoideae, as formerly assumed, but tribe Baisseeae. Periplocoideae are nested in Apocynoideae. However, tribal composition remains unclear in some parts of the family. Clade structure in Apocynaceae is now generally well understood. The principal challenges now lie in identifying characters that can reflect and articulate these clades in a formal classification. Species‐rich, recent radiations such as core Asclepiadinae in Africa and the Metastematinae in Latin America present particular problems in this regard. © 2013 The Linnean Society of London

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“…The translator with its narrow elliptic spoon (Fig. 1B) is typical of that found in Cryptolepis (Venter & Verhoeven, 1997: 710). The translators are between 240 and 267 μm in length.…”

Section: Pollen and Translatorsmentioning

confidence: 68%