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Grant support

Thanks to David Barrington, Robbin Moran, Carmen Prada, and Teresa Terrazas for their helpful comments, and to Myriam Gonzalez for the SEM photos. Sonia Molino received support from UCM and Banco Santander for the pre-doctoral contract of (CT27/18) and for the project with reference PR87/19-22616, which financed part of the work. Michael Sundue received support from the Tryon Pteridophyte Library at The University of Vermont.

Analysis of institutional authors

Molino, SoniaCorresponding Author

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Article

First Record of Sporangiasters in the Blechnaceae

Publicated to:AMERICAN FERN JOURNAL. 111 (3): 196-204 - 2021-07-01 111(3), DOI: 10.1640/0002-8444-111.3.196

Authors: Molino, Sonia; Sundue, Michael; Testo, Weston

Affiliations

Univ Complutense Madrid, Dept Biodivers Ecol & Evolut, Unit Bot, 12 Ave Jose Antonio Novas, Madrid 28040, Spain - Author
Univ Gothenburg, Goteborg Sweden Gothenburg Global Biodivers Ctr, Dept Biol & Environm Sci, Gothenburg, Sweden - Author
Univ Vermont, Dept Plant Biol, Pringle Herbarium, Burlington, VT 05405 USA - Author

Abstract

Sporangiasters are an uncommon type of paraphyses, occurring in a handful of leptosporangiate fern genera. We report sporangiasters in Parablechnum nesophilum, which is their first recorded occurrence in the Blechnaceae. We provide evidence of their homology to sporangia and discuss their functional significance. The presence of sporangiasters in P. nesophilum is surprising because the species has a well-developed indusium, and paraphyses are generally most common in exindusiate ferns. We surmise that these sporangiasters act as a second stage of protection for the developing sporangia after the indusium retracts. Alternatively, it is possible that sporangiasters may influence the vagility of spores by inhibiting dehiscence and limiting the ability of the annulus to disperse its spores.

Keywords

AnatomyClassificationEvolutioMorphologyParaphysesPhylogenySoriSpore dispersaSpore dispersal

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal AMERICAN FERN JOURNAL, and although the journal is classified in the quartile Q4 (Agencia WoS (JCR)), its regional focus and specialization in Plant Sciences, give it significant recognition in a specific niche of scientific knowledge at an international level.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-10:

  • WoS: 1
  • Scopus: 1

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-10:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 3 (PlumX).

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Sweden; United States of America.

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (MOLINO DE MIGUEL, SONIA) .

the author responsible for correspondence tasks has been MOLINO DE MIGUEL, SONIA.