Research Article |
Corresponding author: Li-Yaung Kuo ( lykuo@life.nthu.edu.tw ) Academic editor: Blanca León
© 2021 Yi-Hsuan Wu, Chih-Yun Sun, Atsushi Ebihara, Ngan Thi Lu, Germinal Rouhan, Li-Yaung Kuo.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Wu Y-H, Sun C-Y, Ebihara A, Lu NT, Rouhan G, Kuo L-Y (2021) Two new species in the fern genus Lomariopsis (Lomariopsidaceae) from East Asia. PhytoKeys 187: 161-176. https://doi.org/10.3897/phytokeys.187.77035
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Two East Asian Lomariopsis (Lomariopsidaceae, Polypodiales) species, Lomariopsis moorei and Lomariopsis longini, which were previously misidentified as L. spectabilis, are here described as new species based on evidence from morphological characters and a molecular phylogeny. The two species differ from the three other described species in East Asia by their venation, pinna shapes, and perine morphology. A phylogeny based on a combined dataset of three chloroplast regions (rbcL+ rps4-trnS + trnL-L-F) showed that L. moorei and L. longini each formed a well-supported monophyletic group which was distantly related to both L. spectabilis and the other morphologically similar East Asian species, L. boninensis.
Cryptic species, independent gametophyte, Lomariopsis boninensis, Lomariopsis longini, Lomariopsis moorei, Lomariopsis spectabilis, phylogeny, systematics
Lomariopsis Fée is the most species rich genus in the fern family Lomariopsidaceae and contains approximately 60 spp., accounting for 85% of the family (
To investigate phylogenetically Lomariopsis from these poorly sampled areas, we sampled most Asian and Oceanian species, including all species in East Asia where two previously unidentified species were discovered. They both had been misidentified as L. spectabilis Mett. One was from Chiayi County in Taiwan and Hainan Island in China, and the other one was from northern Vietnam and west southern China. They are superficially similar to two Asian species, L. boninensis Nakai and L. spectabilis in morphology. In this study, we presented a new Lomariopsis phylogeny supplied with comprehensive East Asian sampling, and reevaluated diagnostic characters leading to the description of these species.
Spores were taken from mature sporangia and fixed on double-sided tape, and then gold coated with a sputter-coater for 1–3 min. Spores were subsequently examined with a tabletop SEM (TM 3000; Hitachi, Ibaraki, Japan).
To examine the spore number per sporangium, at least five mature, unopened sporangia per specimen were collected. These sporangia were broken individually, and we counted the number of spores inside under a stereomicroscope.
Twenty-nine samples were included in our molecular phylogenetic study. Voucher information is provided in Appendix
In total, we sampled 35 Lomariopsis species, including African/Malagasy and Neotropical members sequenced in previous studies (
We used IQtree 1.6.8 (
The combined cpDNA alignment matrix included 3,817 nucleotide sites: rbcL (1,431 bp), rps4-trnS (1,233 bp), and trnL-L-F (1,153 bp) with 27.5% of variable sites. In our phylogeny (Fig.
Morphological comparisons of the two new Lomariopsis species with their Asian morphologically similar relatives.
Characters | L. moorei | L. longini | L. boninensis | L. spectabilis |
---|---|---|---|---|
Vein apices ending at the laminar margins | yes | no | yes | yes |
Widest part at upper pinna | <1/2 | <1/3 | <1/2 | ~1/2 |
Stipe scales | dark brown, narrowly lanceolate (usually < 2 mm wide) | dark brown, broadly lanceolate (usually >3 mm wide) | dark brown, broadly lanceolate (usually >2 mm wide) | light brown, narrowly lanceolate (usually <2 mm wide) |
Fertile pinna pairs | 10–14 | 3–9 | 4–16 | 6–14 |
Swollen ring on articulate at abaxial side, especially upper pinnae (Fig. |
obvious | obvious | inconspicuous | inconspicuous |
Spore perine (Fig. |
spiny | folded | spiny | cristate |
Spore number per sporangium | 64 | 32 | 64 | 16 or 32 |
Lomariopsis longini differs from the other similar species, L. spectabilis, L. boninensis, and L. moorei, by its lanceolate upper sterile pinna with the widest portion occurring below the middle of the pinna, and the veins end ca. 0.5 mm before the margins.
Vietnam. Ha Tinh. Huong Son District: Son Kim Municipality, Rao Bun stream, 4 May 2004, P.K. Loc 5095 (holotype: P [P00888363]! isotype: MO!).
Rhizomes stramineous, 0.7–1.2 cm in diam., densely scaly; rhizome scales brown (but blackened at point of attachment), lanceolate, ca. 4–9 × 1.5–3.7 mm. Fronds 1-pinnate, leathery, mature laminae pinnate, dimorphic. Sterile fronds 30–60 cm long, stipes stramineous, 10–20 cm, grooved adaxially, base with scattered scales, lateral pinnae 3–9 pairs, lanceolate, widest in the lower third, 7–16 × 1.5–1.7 cm, apex acuminate; pinna bases cuneate and decurrent, margins entire; lateral pinnae articulate to rachis, swollen ring on abaxial articulation, terminal pinna with a similar size as lateral pinnae, not articulate; upper part of rachis narrowly winged; veins free, simple or furcate, oblique, not extended to margin. Fertile laminae similar to sterile laminae but pinnae much contracted; pinnae linear, 10–20 × ca. 0.2 cm, equilateral, stalks 0.5–1.1 cm, pinna rachis articulate. Sori acrostichoid. Spores 32 per sporangium, perine with cristae.
Vietnam. Nghe An Province: 28 Oct 2014, L.B. Zhang, L. Zhang & N.T. Lu 7185 (CDBI, MO, VNMN); Quang Binh Province: Bo Trach District, Phong Nha-ke Bang National Park, 7 Dec 2004, S.K. Wu and L.K. Phan WP897 (KUN); 13 Dec 2004, WP1124 (KUN); Quang Tri Province: Dakrong District, Trieu Nguyen Commune, 4 Nov 2009, Y.H. Chang 20091104-005 (TAIF); 2 Nov 2009, C.W. Chen Wade 983 (TAIF); Vinh Phuc Province: Tam Dao District, Tam Dao National Park, 14 Dec 2010, L.Y. Kuo 1862 (TAIF, VNMN). China. Yunnan Province: 25 Aug 2014, Q. Wei WQ243 (KUN); 2 Sep 2011, S.Y. Dong 3597 (IBSC); 28 Mar 1987, W.M. Ju et H.C. Yan Ju and Yan 21930 (IBK).
Northern Vietnam, west southern China (Yunnan).
In shaded places, understory of evergreen broad leaf forests, below 1,000 m in elevation.
The lanceolate shape of the terminal pinnae of sterile leaves is similar to the holy lance, which is also called Lance of Longinus.
Lomariopsis moorei is most similar to L. boninensis, but scales on stipes are narrower (usually < 2 mm) in L. moorei (Fig.
Articulation of upper pinnae (abaxial surface) to the rachis A Lomariopsis moorei (Y.H. Wu YX052, TAIF) B Lomariopsis boninensis (TNS790636).
Taiwan. Chiayi County: Dapu Township, Zengwen Reservoir, 9 November 2020, Y.H. Wu YX052 (holotype: TAIF! isotype: TAIF!).
Rhizomes rufous, 1.0–1.2 cm in diam., densely scaly; rhizome scales reddish brown (but blackened at point of attachment), narrowly lanceolate, ca. 4–6 × 0.9–2.2 mm. Fronds 1-pinnate, leathery, juvenile sterile laminae simple, shortly stalked, narrowly lanceolate, 20–25 × 1.0–1.5 cm, base narrowly cuneate, apex acute; mature lamina pinnate, dimorphic. Sterile fronds 30–50 cm long, stipes green, 10–20 cm, grooved adaxially, base with scattered scales, lateral pinnae 6–14 pairs, 1–5 cm apart, narrowly lanceolate, widest in the proximal half, 14–21 × 1.5–2.2 cm, narrowly cuneate, apex acute, base cuneate and decurrent, margin entire or slightly undulate; lateral pinnae articulate to rachis, swollen ring on abaxial articulation, terminal pinna 16–27 × 1.5–2.2 cm, not articulate; upper part of rachis narrowly winged; veins free, simple or furcate, oblique. Fertile laminae similar to sterile laminae but pinnae much contracted; pinnae linear, 10–20 × ca. 0.3 cm, equilateral, pinna rachis 0.3–0.8 cm wide, rachis articulate. Sori acrostichoid; perine consisting with glandular projections. Spores green (= chlorophyllous) and spiny, 64 per sporangium.
Taiwan. Chiayi County: Dapu Township, Zengwen Reservoir, 9 Nov 2020, Y.H. Wu YX053 (TAIF). China. Hainan Province: Wuzhishan City, Mt. Wuzhi National Nature Reserve, 16 July 2007, Y.S. Chao 1211 (TAIF); Mt. Diaoluo, 27 Feb 2012, W.H. Wu 1062 (TAIF); 21 Nov 2000, G.M. Zhang et D. Li 117 (PE); 14 Dec 2003, S.Y. Dong 1045 (PE).
Taiwan (Chiayi County) and China (Hainan Is.).
In shaded places, understory of evergreen broadleaf forests, below 1,000m in elevation.
The name moorei is dedicated to Dr./Mr. Shann-Jye Moore (1966–2010), an enthusiastic fern taxonomist and knowledgeable pteridologist from Taiwan. The Mr. Shann-Jye Moore Memorial Scholarship has been established by the Taiwan Society of Plant Systematics to commemorate his passions, and to support Taiwanese students studying the systematics of ferns and lycophytes.
We have not yet found entire sporophyll from the type locality, but fallen fertile pinnae on14 Aug 2020 (Fig.
In previous molecular phylogenies of Lomariopsis, none of Oceanian species were included, and L. lineata and L. spectabilis (including the misidentified L. boninensis and L. longini) were the only Asian species (
Lomariopsis species diversity in Asia and Oceania could still be underestimated, and more undocumented species could be eventually revealed by phylogenetic analyses using multiple specimens in each morphologically-defined species, similar to the case of discovering the two new species here described. Indeed, L. moorei and L. longini, together with L. boninensis, are genetically distant taxa in East Asia even if all three have been long misidentified and confused under a single name of the South East Asian species, L. spectabilis, due to their overall similar morphology (
1 | Sterile lateral pinnae with lateral veins spreading (borne at nearly right angles to the pinna rachis), free, occasionally anastomosing | L. chinensis |
– | Sterile lateral pinnae with veins oblique, free | 2 |
2 | Sterile lateral pinnae, abruptly narrowed to a caudate apex (2–3 cm long) | L. lineata |
– | Sterile lateral pinnae with acuminate apex | 3 |
3 | Sterile lateral pinnae lanceolate, widest in the lower third | L. longini |
– | Sterile lateral pinnae narrowly lanceolate, widest in the middle | 4 |
4 | Sterile lateral pinnae with pinna stalks (0.3–0.7 cm long), base equilateral | L. spectabilis |
– | Sterile lateral pinnae with, pinna subsessile, base cuneate and decurrent | 5 |
5 | Swollen ring inconspicuous on abaxial articulation (especially upper pinnae), scales on the stipes broadly lanceolate (> 2 mm wide) | L. boninensis |
– | Swollen ring obvious on abaxial articulation side (especially upper pinnae), scales on the stipes narrowly lanceolate (< 2 mm wide) | L. moorei |
We thank Cheng-Wei Chen, Dirk Nikolaus Karger , Yi-Han Chang, Ran Wei, Leon Perrie, Joel Nitta, Jinmei Lu, and Wei-Hsiu Wu for collecting DNA materials for this study; Fay-Wei Li for generating the DNA sequences of Lomariopsis sorbifolia; Alexandria Quinlan for English edits; Robbin Moran, Tom A. Ranker, and Blanca León for the comments on the manuscript revision. The staff in herbaria KUN, P, TAIF, and TNS are gratefully acknowledged for the loan of specimens. The MNHN (Paris, France) gives access to the collections in the framework of the RECOLNAT national Research Infrastructure. This project was supported by MOST project (109-2621-B-007-001-MY3) in Taiwan, the Bioresource Conservation Research Center in College of Life Science from the Higher Education Sprout Project by MOE, Biodiversity Information Fund for Asia project (BIFA6_010), and Mr. Shann-Jye Moore Memorial Scholarship.
Voucher information and GenBank accession numbers. –, sequences not available. *sequences obtained in this study.
Species name | Locality | Voucher (Herbarium) | GenBank accession number | ||
---|---|---|---|---|---|
rbcL | rps4-trnS | trnL-L-F | |||
Cyclopeltis crenata | China, Hainan | Wu935 (TAIF) | OL420736* | OL473642* | OL473665* |
Cyclopeltis novoguineensis | Solomon Islands | SITW068 (TAIF) | KY397974 | KY397978 | KY397970 |
Cyclopeltis semicordata | Costa Rica | CJR et al. 08-195 (DUKE) | EF463234 | KY397977 | KY397969 |
Dracoglossum plantagineum | Guadeloupe | Christenhusz 4065 (TUR) | KY397975 | KC914565 | KY397971 |
Dryopolystichum phaeostigma | Solomon Islands | SITW10443 (BSIP, TAIF, TNM) | KY397972 | KY397976 | KY397968 |
Lomariopsis aff. brackenridgei | Vanuatu, Espiritu Santo Is. | Matsumoto 01-857 (TNS) | - | - | OL473666* |
Lomariopsis boninensis | Japan, Bonin Is. | TNS 763923 (TNS) | AB575226 | OL473643* | OL473667* |
Lomariopsis boninensis | Japan, Ishigaki Is. | Ebihara 2957 (TNS) | OL420737* | OL473644* | OL473668* |
Lomariopsis boninensis | Taiwan, Orchid Is. | CYH20091123_03 (TAIF) | OL420738* | OL473645* | OL473669* |
Lomariopsis boninensis | Taiwan, Orchid Is. | CYH20110918_25 (TAIF) | - | OL473646* | OL473670* |
Lomariopsis boninensis | Taiwan | Kuo 2423 (TAIF) | OL420739* | OL473647* | OL473671* |
Lomariopsis boninensis | Taiwan | Kuo 976 (TAIF) | OL420740* | OL473648* | OL473672* |
Lomariopsis brackenridgei | Fiji | FJ_2011_207 (WELT) | OL420741* | OL473649* | OL473673* |
Lomariopsis brackenridgei | French Polynesia, Moorea | JNG3191 (UC) | - | - | OL473674* |
Lomariopsis cf. lineata | Unknown Origin | F042 (SING) | OL420742* | AM947063 | AM946393 |
Lomariopsis japurensis | Unknown Origin | Lehtonen 989 (TUR) | MK705752 | MK705752 | MK705752 |
Lomariopsis kingii | Indonesia, Bacan | DK1398 (UC) | OL420743* | OL473650* | OL473675* |
Lomariopsis kingii | New Guinea | DK2800 (UC) | OL420744* | OL473651* | OL473676* |
Lomariopsis leptocarpa | Micronesia | Masuda 6919 (TNS) | OL420745* | OL473652* | OL473677* |
Lomariopsis lineata | Indonesia, Sulawesi | DK925 (UC) | OL420746* | OL473653* | OL473678* |
Lomariopsis lineata | Philippines | Kuo 2052 (TAIF) | OL420747* | OL473654* | OL473679* |
Lomariopsis lineata | Philippines | Wade 3946 (TAIF) | - | - | OL473680* |
Lomariopsis novaecaledoniae | New Caledonia | Nakamura 2157 (TNS) | - | OL473655* | OL473681* |
Lomariopsis sorbifolia | Guadeloupe | Christenhusz 4070 (TUR) | EF463236 | OL473656* | OL473682* |
Lomariopsis longini | China, Yunnan | Dong 3597 (IBSC) | OL420748* | OL473657* | OL473683* |
Lomariopsis longini | China, Yunnan | WQ243 (KUN) | OL420749* | OL473658* | OL473684* |
Lomariopsis longini | Vietnam | Wade983 (TAIF) | OL420750* | OL473659* | OL473685* |
Lomariopsis longini | Vietnam | Zhang et al.7185 | KU605187 | KU605086 | KU605107 |
Lomariopsis longini | Vietnam | WP897 (KUN) | - | - | OL473686* |
Lomariopsis longini | Vietnam | WP1124 (KUN) | - | - | OL473687* |
Lomariopsis moorei | Taiwan | YX052 (TAIF) | OL420751* | OL473660* | OL473688* |
Lomariopsis moorei | China, Hainan | HN197 (PE) | OL420752* | OL473661* | OL473689* |
Lomariopsis moorei | Taiwan | Ha 10** | - | - | OL473690* |
Lomariopsis moorei | China, Hainan | Wu 1062 (TAIF) | OL420753* | OL473662* | OL473691* |
Lomariopsis spectabilis | Indonesia, Java | Wade 1100 (TAIF) | OL420754* | OL473663* | OL473692* |
Lomariopsis spectabilis | Indonesia, Java | Wade 1838 (TAIF) | OL420755* | OL473664* | OL473693* |
Lomariopsis cordata | Madagascar | Rakotondrainibe 1771 (P) | - | - | DQ396558 |
Lomariopsis crassifolia | Madagascar | Janssen et al. 2527 (P) | - | - | DQ396602 |
Lomariopsis crassifolia | Madagascar | Humblot 442 (P) | - | - | DQ396559 |
Lomariopsis guineensis | Sierra Leone | Fay & Fay s.n., in 1985 (NY) | - | - | DQ396560 |
Lomariopsis hederacea | Cameroon | Raynal 9954 (P) | - | - | DQ396561 |
Lomariopsis jamaicensis | Jamaica | Maxon & Killip 1463 (NY) | - | - | DQ396562 |
Lomariopsis japurensis | Ecuador | Moran 6021 (NY, QCA, QCNE) | - | - | DQ396566 |
Lomariopsis japurensis | Ecuador | Moran 6061 (NY, QCA, QCNE) | - | - | DQ396565 |
Lomariopsis japurensis | Costa Rica | Moran 6381(CR, INB, NY) | - | - | DQ396567 |
Lomariopsis japurensis | Bolivia | Sundue 708 (LPB, NY, USZ) | - | - | DQ396563 |
Lomariopsis japurensis | Peru | Bell 88180 (NY) | - | - | DQ396564 |
Lomariopsis japurensis | Bolivia | Jimenez 2016 (LPB, NY) | - | - | DQ396568 |
Lomariopsis kunzeana | Haiti | Zanoni 28649 (EHH, NY) | - | - | DQ396570 |
Lomariopsis kunzeana | United States | Peck s.n. (NY) | - | - | DQ396569 |
Lomariopsis latipinna | Ecuador | Moran 6027 (NY, QCA, QCNE, TUR) | - | - | DQ396571 |
Lomariopsis lineata | Thailand | Larsen 45851 (AAU, NY) | - | - | DQ396572 |
Lomariopsis longicaudata | Madagascar | Janssen 2493 (P) | - | - | DQ396574 |
Lomariopsis longicaudata | Madagascar | Rakotondrainibe 6191 (P) | - | - | DQ396573 |
Lomariopsis madagascarica | Madagascar | Kessler 12786 (NY) | - | - | DQ396575 |
Lomariopsis madagascarica | Madagascar | Decary 18186 (P) | - | - | DQ396576 |
Lomariopsis mannii | Democratic Republic Of Congo | Kassner s.n., in 1914 (P) | - | - | DQ396577 |
Lomariopsis marginata | Brazil | Pires et al. 50316 (NY) | - | - | DQ396579 |
Lomariopsis marginata | Brazil | Amorim 1920 (CEPEC, NY) | - | - | AY540045 |
Lomariopsis marginata | Brazil | Labiak 104 (NY, UPCB) | - | - | DQ396578 |
Lomariopsis maxonii | Costa Rica | Moran 4172 (CR, NY, UC) | - | - | DQ396580 |
Lomariopsis maxonii | Costa Rica | Smith 1660 (CR, NY, UC) | - | - | DQ396581 |
Lomariopsis nigropaleata | Ecuador | Moran 6053 (NY) | - | - | DQ396584 |
Lomariopsis nigropaleata | Bolivia | Jimenez 1949 (LPB, NY) | - | - | DQ396583 |
Lomariopsis palustris | Sierra Leone | Fay 1124 (NY) | - | - | DQ396585 |
Lomariopsis pervillei | Madagascar | Rakotondrainibe et al. 6626 (P) | - | - | DQ396586 |
Lomariopsis pervillei | Madagascar | Rakotondrainibe et al. 6623 (P) | - | - | DQ396587 |
Lomariopsis warneckei | Comoros | Rakotondrainibe et al. 6707 (P) | - | - | DQ396588 |
Lomariopsis pollicina | Madagascar | Kessler 12785 (GOET, NY) | - | - | DQ396589 |
Lomariopsis prieuriana | Venezuela | Cortez 475 (NY, VEN) | - | - | DQ396591 |
Lomariopsis prieuriana | Panama | Moran 5080 (MO, NY, PMA) | - | - | DQ396590 |
Lomariopsis recurvata | Mexico | Rivera 1343 (NY) | - | - | DQ396592 |
Lomariopsis recurvata | Mexico | Hernandez 2286 (NY) | - | - | DQ396593 |
Lomariopsis rossii | Liberia | Fay 1237 (NY) | - | - | DQ396594 |
Lomariopsis salicifolia | Ecuador | Moran 6022 (AAU, NY, QCA, QCNE, TUR) | - | - | DQ396597 |
Lomariopsis salicifolia | Ecuador | Moran 6129 (NY, QCA, QCNE) | - | - | DQ396595 |
Lomariopsis salicifolia | Ecuador | Moran 6956 (NY, QCA, QCNE) | - | - | DQ396596 |
Lomariopsis warneckei | Madagascar | Janssen et al. 2444 (P) | - | - | DQ396601 |
Lomariopsis warneckei | Madagascar | Rouhan et al. 318 (P) | - | - | DQ396603 |
Lomariopsis vestita | Costa Rica | Moran 6382 (CR, INB, NY, USJ) | - | - | DQ396598 |
Lomariopsis vestita | Costa Rica | Folsom 9011 (NY) | - | - | DQ396599 |
Lomariopsis wrightii | Cuba | Underwood 948 (NY) | - | - | DQ396600 |