Beware my spines: a new spiny fern (<i>Dennstaedtia</i>, Dennstaedtiaceae) from central and western Amazonia

PENA, Nelson Túlio Lage; ZUQUIM, Gabriela; SCHWARTSBURD, Pedro Bond

doi:10.1590/1809-4392202103661

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Biodiversity and Conservation • Acta Amaz. 52 (2) • Apr-Jun 2022 • https://doi.org/10.1590/1809-4392202103661 copy

Beware my spines: a new spiny fern (Dennstaedtia, Dennstaedtiaceae) from central and western Amazonia

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

A new spiny fern belonging to the genus Dennstaedtia is described from Brazilian and Peruvian Amazonia. Dennstaedtia aculeata (sp. nov.) is the third spiny species known for the genus, and the first in South America. It is compared with another Neotropical spiny Dennstaedtia, D. spinosa. We also present images, illustrations and a distribution map of the specimens, and discuss the habitat preference of the species towards nutrient-richer soils and spinescence in the family.

KEYWORDS:
Dennstaedtia aculeata; Dennstaedtia spinosa; Dennstaedtioideae; leptosporangiate ferns; Neotropics

Authorship

Nelson Túlio Lage PENA ^** Corresponding author: penatulio@gmail.com

Universidade Federal de Viçosa, Departamento de Biologia Vegetal, Programa de Pós-Graduação em Botânica, Laboratório de Sistemática e Evolução de Plantas, Av. Peter Henry Rolfs, s/n, 36570-900 Viçosa, Minas Gerais, BrazilUniversidade Federal de ViçosaBrazilViçosa, Minas Gerais, BrazilUniversidade Federal de Viçosa, Departamento de Biologia Vegetal, Programa de Pós-Graduação em Botânica, Laboratório de Sistemática e Evolução de Plantas, Av. Peter Henry Rolfs, s/n, 36570-900 Viçosa, Minas Gerais, Brazil

https://orcid.org/0000-0002-3145-8183

Gabriela ZUQUIM

Aarhus University, Department of Biology, Section for Ecoinformatics and Biodiversity, DenmarkAarhus UniversityDenmarkDenmarkAarhus University, Department of Biology, Section for Ecoinformatics and Biodiversity, Denmark

University of Turku, Department of Biology, FinlandUniversity of TurkuFinlandFinlandUniversity of Turku, Department of Biology, Finland

Pedro Bond SCHWARTSBURD

*Corresponding author: penatulio@gmail.com

ASSOCIATE EDITOR:

Natália Ivanauskas

SCIMAGO INSTITUTIONS RANKINGS

University of Turku, Department of Biology, FinlandUniversity of TurkuFinlandFinlandUniversity of Turku, Department of Biology, Finland

Figures

Figures (4)

Thumbnail

Figure 1
Dennstaedtia aculeata. A - Section of the petiole, showing spinescence; B - Rachis showing alternate pinnae; C - Pinna; D - Detail of rachis showing spines and acicular hairs; E - Detail of rachis showing acicular and catenate hairs with prominent base; F - Pinnule abaxially; G - Ultimate segment, abaxially, showing sori. Credits: Reinaldo Pinto.

Thumbnail

Figure 2
Dennstaedtia aculeata (sp. nov.) (G. Cárdenas & & J. Vormisto 1541, TUR-599750, TUR-599751, TUR-599752). A - Laminar apex; B - Medial pinnae; C - Basal pinna and petiole; D - Petiole and part of the rhizome in detail. Credits: G. Zuquim; edited by N.T.L. Pena. This figure is in color in the electronic version.

Thumbnail

Figure 3
Distribution map of Dennstaedtia aculeta (sp. nov.). A - Known location records of Dennstaedtia aculeata in the Amazon region; B-C - Collection site of the type specimen near the artificial lake of the Balbina hydroeletric dam in Amazonas, Brazil; D-E - Collection site of the paratype in the Pastaza fan, near Iquitos, Peru. Background image is the median reflectances of Landsat scenes imagery (Van doninck and Tuomisto 2018Van doninck, J.; Tuomisto, H. 2018. A Landsat composite covering all Amazonia for applications in ecology and conservation. Remote Sensing in Ecology and Conservation, 4: 197-210.) coarsened to 450 m resolution. Red, green and blue channels have been assigned, respectively, to bands 4, 5 and 7. Reflectance ranges for each band were 2700-3500, 1100-1600 and 430-670, respectively. Amazonian limits according to Eva and Huber 2005Eva, H.D.; Huber, O. 2005. A Proposal for Defining the Geographical Boundaries of Amazonia. Office for Official Publications of the European Communities, Luxemburg, 39p. ( (http://publications.jrc.ec.europa.eu/repository/bitstream/JRC68635/eur%2021808%20en.pdf ). Accessed on 26 Apr 2022.
http://publications.jrc.ec.europa.eu/rep... . This figure is in color in the electronic version.

Thumbnail

Figure 4
Dennstaedtia aculeata (sp. nov.) (G. Zuquim & & R. Braga-Neto 172, INPA-219630). A - Rachis with alternating pinnae; B - Pinules and ultimate segments, abaxially; C - Petiole dark brown to vinaceus and densely spiny. Dennstaedtia spinosa (M. Sundue et al. 5045, VT-290463; J.T. Mickel 2730, NY-149042). D - Rachis with opposite pinnae; E - Pinules and ultimate segments, abaxially; F - Petiole light brown and sparsely spiny. Credits: N.T.L. Pena (A, D, E); G. Zuquim (B, C); NYBG virtual herbarium (F). This figure is in color in the electronic version.

Figure 1 Dennstaedtia aculeata. A - Section of the petiole, showing spinescence; B - Rachis showing alternate pinnae; C - Pinna; D - Detail of rachis showing spines and acicular hairs; E - Detail of rachis showing acicular and catenate hairs with prominent base; F - Pinnule abaxially; G - Ultimate segment, abaxially, showing sori. Credits: Reinaldo Pinto.

Figure 2 Dennstaedtia aculeata (sp. nov.) (G. Cárdenas & & J. Vormisto 1541, TUR-599750, TUR-599751, TUR-599752). A - Laminar apex; B - Medial pinnae; C - Basal pinna and petiole; D - Petiole and part of the rhizome in detail. Credits: G. Zuquim; edited by N.T.L. Pena. This figure is in color in the electronic version.

Figure 3 Distribution map of Dennstaedtia aculeta (sp. nov.). A - Known location records of Dennstaedtia aculeata in the Amazon region; B-C - Collection site of the type specimen near the artificial lake of the Balbina hydroeletric dam in Amazonas, Brazil; D-E - Collection site of the paratype in the Pastaza fan, near Iquitos, Peru. Background image is the median reflectances of Landsat scenes imagery (Van doninck and Tuomisto 2018Van doninck, J.; Tuomisto, H. 2018. A Landsat composite covering all Amazonia for applications in ecology and conservation. Remote Sensing in Ecology and Conservation, 4: 197-210.) coarsened to 450 m resolution. Red, green and blue channels have been assigned, respectively, to bands 4, 5 and 7. Reflectance ranges for each band were 2700-3500, 1100-1600 and 430-670, respectively. Amazonian limits according to Eva and Huber 2005Eva, H.D.; Huber, O. 2005. A Proposal for Defining the Geographical Boundaries of Amazonia. Office for Official Publications of the European Communities, Luxemburg, 39p. ( (http://publications.jrc.ec.europa.eu/repository/bitstream/JRC68635/eur%2021808%20en.pdf ). Accessed on 26 Apr 2022.
http://publications.jrc.ec.europa.eu/rep... . This figure is in color in the electronic version.

Figure 4 Dennstaedtia aculeata (sp. nov.) (G. Zuquim & & R. Braga-Neto 172, INPA-219630). A - Rachis with alternating pinnae; B - Pinules and ultimate segments, abaxially; C - Petiole dark brown to vinaceus and densely spiny. Dennstaedtia spinosa (M. Sundue et al. 5045, VT-290463; J.T. Mickel 2730, NY-149042). D - Rachis with opposite pinnae; E - Pinules and ultimate segments, abaxially; F - Petiole light brown and sparsely spiny. Credits: N.T.L. Pena (A, D, E); G. Zuquim (B, C); NYBG virtual herbarium (F). This figure is in color in the electronic version.

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Instituto Nacional de Pesquisas da Amazônia Av. André Araujo, 2936 Aleixo, 69060-001 Manaus AM Brasil, Tel.: +55 92 3643-3030, Fax: +55 92 643-3223 - Manaus - AM - Brazil
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Beware my spines: a new spiny fern (<i>Dennstaedtia</i>, Dennstaedtiaceae) from central and western Amazonia

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[1] *Corresponding author: penatulio@gmail.com