Abstract
Various published hypotheses regarding circumscription and relationships of species within the Radula parvitexta and R. ventricosa species groups were tested using molecular data from three chloroplast markers. The phylogeny resolves five clades within the R. parvitexta species group in Australia, which proves polyphyletic across two subgenera, or three subgenera if R. madagascariensis is included. One clade represents an undescribed species, R. psychosis sp. nov., one corresponds to R. madagascariensis, a new record for Australia, the others to R. ratkowskiana, R. tasmanica and R. robinsonii. R. ratkowskiana is reinstated from synonymy of R. tasmanica, and R. parvitexta is placed into synonymy of R. robinsonii. A second new species belonging to the R. parvitexta species group, R. kilgourii sp. nov., is described; however, it was not included in the phylogeny. Three clades were resolved within the R. ventricosa species group in Australia, which is nested within subg. Metaradula. These clades corresponded to R. jovetiana, R. loriana, which is reinstated from synonymy of R. ventricosa, and two new species, namely, R. myriopoda sp. nov. and R. forficata sp. nov. R. ventricosa is excluded from the Australian flora, because all material is referrable to R. loriana. R. forficata and R. kilgourii had not been collected before the present study. R. myriopoda and R. jovetiana exhibit overlap in morphology of the sterile gametophyte and can be reliably separated only on characters associated with the perianth mouth. They can be considered semicryptic species, and would not have been recognised independent of fieldwork and molecular investigations conducted as part of the present study.
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Claims 16
Claim · model-written summary
The R. parvitexta group resolved into five clades in Australia.
Verbatim
e0“The phylogeny resolves five clades within the R. parvitexta species group in Australia”
Claim · model-written summary
The R. parvitexta group was polyphyletic across at least two subgenera.
Verbatim
e0“The phylogeny resolves five clades within the R. parvitexta species group in Australia, which proves polyphyletic across two subgenera, or three subgenera if R. madagascariensis is included”
t0“Radula parvitexta and R. ventricosa species groups”
Claim · model-written summary
R. psychosis was identified as a new species.
- Taxon
- R. psychosisRadula psychosise0
- Outcome
- undescribed speciese0
Verbatim
e0“One clade represents an undescribed species, R. psychosis sp. nov.”
Claim · model-written summary
R. madagascariensis is a new Australian record.
- Taxon
- R. madagascariensisRadula madagascariensise0
- Outcome
- new record for Australiae0
- Setting
- Australiae0
Verbatim
e0“R. madagascariensis, a new record for Australia”
Claim · model-written summary
R. ratkowskiana was reinstated from synonymy of R. tasmanica.
- Taxon
- R. ratkowskianaRadula ratkowskianae0
- Outcome
- reinstated from synonymy of R. tasmanicae0
Verbatim
e0“R. ratkowskiana is reinstated from synonymy of R. tasmanica”
Claim · model-written summary
R. parvitexta was synonymized with R. robinsonii.
Verbatim
e0“R. parvitexta is placed into synonymy of R. robinsonii”
Claim · model-written summary
R. kilgourii was described as a new species.
Verbatim
e0“R. kilgourii sp. nov., is described”
Claim · model-written summary
Three clades were resolved in the Australian R. ventricosa group.
Verbatim
e0“Three clades were resolved within the R. ventricosa species group in Australia”
Claim · model-written summary
The R. ventricosa group was nested within subgenus Metaradula.
Verbatim
e0“R. ventricosa species group in Australia, which is nested within subg. Metaradula”
Claim · model-written summary
R. loriana was reinstated from synonymy with R. ventricosa.
- Taxon
- R. lorianaRadula lorianae0
- Outcome
- reinstated from synonymy of R. ventricosae0
Verbatim
e0“R. loriana, which is reinstated from synonymy of R. ventricosa”
Claim · model-written summary
R. myriopoda was recognized as a new species.
- Taxon
- R. myriopodaRadula myriopodae0
- Outcome
- sp. nov.e0
Verbatim
e0“R. myriopoda sp. nov.”
Claim · model-written summary
R. forficata was recognized as a new species.
- Taxon
- R. forficataRadula forficatae0
- Outcome
- sp. nov.e0
Verbatim
e0“R. forficata sp. nov.”
Claim · model-written summary
R. ventricosa was excluded from the Australian flora as material was assigned to R. loriana.
Verbatim
e0“R. ventricosa is excluded from the Australian flora, because all material is referrable to R. loriana”
Claim · model-written summary
R. forficata and R. kilgourii had not been collected before this study.
Verbatim
e0“R. forficata and R. kilgourii had not been collected before the present study”
Claim · model-written summary
R. myriopoda and R. jovetiana overlap in sterile gametophyte morphology.
- Taxon
- R. myriopoda and R. jovetianaRadula jovetianaRadula myriopodae0
- Outcome
- overlap in morphology of the sterile gametophytee0
Verbatim
e0“R. myriopoda and R. jovetiana exhibit overlap in morphology of the sterile gametophyte”
Claim · model-written summary
R. myriopoda and R. jovetiana can be reliably separated only by perianth mouth characters.
- Taxon
- R. myriopoda and R. jovetianaRadula jovetianaRadula myriopodae0
- Outcome
- separated only on characters associated with the perianth mouthe0
Verbatim
e0“R. myriopoda and R. jovetiana exhibit overlap in morphology of the sterile gametophyte and can be reliably separated only on characters associated with the perianth mouth”
t0“Radula parvitexta and R. ventricosa species groups”