Research Article |
Corresponding author: Wan-Hao Chen ( cwhisaria@163.com ) Academic editor: Xinlei Fan
© 2022 Wan-Hao Chen, Jian-Dong Liang, Xiu-Xiu Ren, Jie-Hong Zhao, Yan-Feng Han, Zong-Qi Liang.
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:
Chen W-H, Liang J-D, Ren X-X, Zhao J-H, Han Y-F, Liang Z-Q (2022) Phylogenetic, ecological and morphological characteristics reveal two new spider-associated genera in Clavicipitaceae. MycoKeys 91: 49-66. https://doi.org/10.3897/mycokeys.91.86812
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Clavicipitaceous fungi are pathogenic to scale insects, white flies and other insect orders. However, a few species are spider-associated. Two new genera from China, Neoaraneomyces and Pseudometarhizium, are described based on phylogenetic, ecological and morphological characteristics. Two spider-associated species, Neoaraneomyces araneicola, Pseudometarhizium araneogenum, and an insect-associated species Pseudometarhizium lepidopterorum are included. The morphological characteristics of paecilomyces-like conidiogenous structures, present in many insect/spiders associated species make species-level identifications difficult. A phylogenetic analysis of the combined dataset (ITS, LSU, RPB2 and TEF), placed the two new genera in Clavicipitaceae. The new spider-associated species may be the result of convergent evolution to adapt to the ecological environment and may have undergone host jumping or altered their nutritional preferences.
Clavicipitaceae, convergent evolution, morphology, nutritional preference, phylogeny
Araneogenous or araneopathogenic fungi are spider-pathogenic fungi (
Members of Clavicipitaceae are distributed worldwide and found in almost all terrestrial ecosystems. Currently, Clavicipitaceae contains 49 genera and over 500 species (
During a survey of entomopathogenic fungi and their allies in southwestern China, infected insect and spider specimens were obtained, and some fungal strains were isolated and purified. The goal of this research is to identify those new strains by multigene phylogeny, morphological and ecological characteristics.
Four infected insect and spider specimens (DY10171, DY10174, DY10180 and SD0536) were collected from Duyun City (26°21'24.71"N, 107°22'48.22"E) and Sandu County (25°57'22.21"N, 107°57'54.69"E), Guizhou Province, on 1 October and 1 May, 2019. Isolation of strains was conducted as described by
Macroscopic and microscopic morphological characteristics of the fungi were examined, especially for the arrangement, shape and measurement of phialides and conidia, and also the growth rates were determined from cultures grown on potato dextrose agar (PDA) cultures incubated at 25 °C for 14 days. Hyphae and conidiogenous structures were mounted in lactophenol cotton blue or 20% lactic acid solution and observed with an optical microscope (OM, DM4 B, Leica, Germany).
DNA extraction was carried out by Fungal genomic DNA Extraction Kit (DP2033, BioTeke Corporation) in accordance with
List of strains and GenBank accession numbers of sequences used in this study.
Species | Strain No. | GenBank Accession No. | |||
---|---|---|---|---|---|
ITS | LSU | RPB2 | TEF | ||
Aciculosporium oplismeni | MAFF 246966 | LC571760 | LC571760 | LC572054 | LC572040 |
A. take | MAFF 241224 | LC571753 | LC571753 | LC572048 | LC572034 |
A. take | TNS-F-60465 | LC571755 | LC571756 | LC572049 | LC572035 |
Akanthomyces aculeatus | HUA 772 | KC519371 | - | - | KC519366 |
Aschersonia badia | BCC 8105 | - | DQ518752 | DQ522411 | DQ522317 |
A. placenta | BCC 7869 | - | EF469074 | EF469104 | EF469056 |
Atkinsonella hypoxylon | B4728 | - | - | KP689514 | KP689546 |
Balansia epichloe | A.E.G. 96-15a | - | - | EF468908 | EF468743 |
B. henningsiana | GAM 16112 | - | AY545727 | DQ522413 | AY489610 |
B. pilulaeformis | A.E.G. 94-2 | - | AF543788 | DQ522414 | DQ522319 |
Bionectria ochroleuca | AFTOL-ID 187 | - | DQ862027 | DQ862013 | DQ862029 |
B. vesiculosa | HMAS 183151 | HM050304 | HM050302 | - | - |
Calcarisporium arbuscula | CBS 221.73 | AY271809 | - | - | - |
C. arbuscula | CBS 900.68 | KT945003 | KX442598 | KX442597 | KX442596 |
C. cordycipiticola | CGMCC 3.17905 | KT944999 | KX442599 | KX442594 | KX442593 |
C. cordycipiticola | CGMCC 3.17904 | KT945001 | KX442604 | KX442607 | KX442605 |
C. xylariicola | HMAS 276836 | KX442603 | KX442601 | KX442606 | KX442595 |
Calonectria ilicicola | CBS 190.50 | GQ280605 | GQ280727 | KM232307 | AY725726 |
Cephalosporium curtipes | CBS 154.61 | AJ292404 | AF339548 | EF468947 | EF468802 |
Claviceps fusiformis | ATCC 26019 | JN049817 | U17402 | - | DQ522320 |
C. purpurea | GAM 12885 | - | AF543789 | DQ522417 | AF543778 |
C. purpurea | S.A. cp11 | - | EF469075 | EF469105 | EF469058 |
Clonostachys rosea | GJS90-227 | - | AY489716 | - | AY489611 |
Cocoonihabitus sinensis | HMAS254523 | KY924870 | KY924869 | - | - |
C. sinensis | HMAS254524 | MF687395 | MF687396 | - | - |
Collarina aurantiaca | FMR 11134 | KJ807178 | KJ807181 | - | - |
C. aurantiaca | FMR 11784 | KJ807177 | KJ807180 | - | - |
Conoideocrella luteorostrata | NHJ 11343 | - | EF468850 | - | EF468801 |
C. luteorostrata | NHJ 12516 | - | EF468849 | - | EF468800 |
C. tenuis | NHJ 6293 | - | EU369044 | EU369087 | EU369029 |
Corallocytostroma ornithocopreoides | WAC 8705 | - | - | LT216620 | LT216546 |
Cordyceps brongniartii | BCC16585 | JN049867 | JF415967 | JF415991 | JF416009 |
C. militaris | OSC93623 | JN049825 | AY184966 | - | DQ522332 |
Dactylonectria alcacerensis | CBS 129087 | JF735333 | KM231629 | - | JF735819 |
Dussiella tuberiformis* | - | - | JQ257020 | JQ257027 | |
Elaphocordyceps ophioglossoides | NBRC 106332 | JN943322 | JN941409 | - | - |
E. paradoxa | NBRC 106958 | JN943324 | JN941411 | - | - |
Ephelis japonica | CBS 236.64 | MH858427 | - | - | - |
E. japonica | Eph.oryzae | AB038564 | - | - | - |
E. tripsaci | CBS 857.72 | NR_153997 | NG_059240 | - | - |
Epichloe elymi | C. Schardl 760 | - | AY986924 | - | AY986951 |
E. typhina | ATCC 56429 | JN049832 | U17396 | DQ522440 | AF543777 |
Flammocladiella aceris | CPC 24422 | KR611883 | KR611901 | - | - |
Fusarium circinatum | CBS 405.97 | U61677 | - | JX171623 | KM231943 |
F. sublunatum | CBS 189.34 | HQ897830 | KM231680 | - | - |
Gelasinospora tetrasperma | AFTOL-ID 1287 | - | DQ470980 | DQ470932 | DQ471103 |
Haptocillium sinense | CBS 567.95 | AJ292417 | AF339545 | - | - |
Helicocollum krabiensis | BCC 71374 | - | KT222327 | - | KT222342 |
H. surathaniensis | BCC 34463 | - | KT222328 | - | KT222336 |
H. surathaniensis | BCC 34464 | - | KT222329 | - | KT222337 |
Heteroepichloe bambusae | Ba-01 | AB065426 | - | - | - |
H. bambusae | Bo-01 | AB065428 | - | - | - |
H. sasae | E. sasae-H | AB065432 | - | - | - |
H. sasae | E. sasae-N | AB065431 | - | - | - |
Hydropisphaera erubescens | ATCC 36093 | - | AF193230 | AY545731 | DQ518174 |
H. lutea | ATCC 208838 | - | AF543791 | DQ522446 | AF543781 |
H. peziza | GJS92-101 | - | AY489730 | - | AY489625 |
H. rufa | DAOM JBT1003 | JN942883 | JN938865 | - | - |
Hypocrea americana | AFTO -ID 52 | DQ491488 | AY544649 | - | DQ471043 |
Hypocrella discoidea | BCC 8237 | JN049840 | DQ384937 | DQ452461 | DQ384977 |
Hypomyces polyporinus | ATCC 76479 | - | AF543793 | - | AF543784 |
H. aurantius | GJS74-69 | FJ442642 | HM466684 | FJ442744 | FJ467643 |
Keithomyces sp. | CBS 126563 | - | MT078856 | - | MT078921 |
K. carneus | CBS 239.32 | NR_131993 | NG_057769 | EF468938 | EF468789 |
Lecanicillium attenuatum | CBS 402.78 | AJ292434 | AF339565 | EF468935 | EF468782 |
L. lecanii | CBS 101247 | JN049836 | KM283794 | KM283859 | DQ522359 |
L. psalliotae | CBS 367.86 | - | KM283800 | - | KM283823 |
Marquandomyces marquandii | CBS 182.27 | NR_131994 | EF468845 | EF468942 | EF468793 |
Marquandomyces sp. | CBS 127132 | - | MT078857 | MT078922 | - |
Metapochonia bulbillosa | CBS 145.70 | - | AF339542 | EF468943 | EF468796 |
M. gonioides | CBS 891.72 | AJ292409 | AF339550 | DQ522458 | DQ522354 |
M. rubescens | CBS 464.88 | - | AF339566 | EF468944 | EF468797 |
M. sulchlasporia | CBS 251.83 | NR_154139 | MH873311 | - | KJ398790 |
Metarhiziopsis microspora | CEHS133a | EF464589 | EF464571 | - | - |
M. microspora | INEHS133a | EF464583 | EF464572 | - | - |
Metarhizium anisopliae | ARSEF 7487 | - | - | DQ468370 | DQ463996 |
M. anisopliae | CBS 130.71 | MT078884 | MT078853 | MT078918 | MT078845 |
M. flavoviride | CBS 125.65 | MT078885 | MT078854 | MT078919 | MT078846 |
M. flavoviride | CBS 700.74 | - | MT078855 | MT078920 | MT078847 |
M. flavoviride | CBS 218.56 | - | - | - | KJ398787 |
Moelleriella phyllogena | CUP 067785 | - | EU392610 | - | EU392674 |
M. phyllogena | CUP 067793 | - | EU392608 | - | EU392672 |
M. schizostachyi | BCC 14123 | - | DQ518771 | DQ522447 | DQ522346 |
M. umbospora | CUP 067817 | - | EU392628 | - | EU392688 |
Mycophilomyces periconiae | CPC 27558 | NR_154209 | NG_059746 | - | - |
Myriogenospora atramentosa | A.E.G 96-32 | - | AY489733 | DQ522455 | AY489628 |
Myrotheciomyces corymbiae | CPC 33206 | NR_160351 | NG_064542 | - | - |
Myrothecium inundatum | IMI158855 | - | AY489731 | - | AY489626 |
M. roridum | ATCC 16297 | - | AY489708 | - | AY489603 |
M. verrucaria | ATCC 9095 | - | AY489713 | - | AY489608 |
Nectria cinnabarina | CBS 125165 | HM484548 | HM484562 | KM232402 | HM484527 |
N. nigrescens | CBS 125148 | HM484707 | HM484720 | KM232403 | HM484672 |
Nectriopsis violacea | CBS 424.64 | - | AY489719 | - | - |
Neoaraneomyces araneicola | DY101711 | MW730520 | MW730609 | MW753026 | MW753033 |
N. araneicola | DY101712 | MW730522 | MW730610 | MW753027 | MW753034 |
Neobarya parasitica | Marson s/n | KP899626 | KP899626 | - | - |
Neonectria candida | CBS 151.29 | JF735313 | AY677333 | - | JF735791 |
N. faginata | CBS 217.67 | HQ840385 | HQ840382 | DQ789797 | JF268746 |
N. neomacrospora | CBS 118984 | HQ840388 | HQ840379 | DQ789810 | JF268754 |
N. ramulariae | CBS 182.36 | HM054157 | HM042435 | DQ789793 | HM054092 |
Neurospora crassa | ICMP 6360 | AY681193 | AY681158 | - | - |
Niesslia exilis | CBS 560.74 | - | AY489720 | - | AY489614 |
Nigelia aurantiaca | BCC13019 | - | GU979948 | GU979971 | GU979957 |
N. martiale | EFCC 6863 | - | JF415974 | - | JF416016 |
Ophiocordyceps heteropoda | EFCC 10125 | JN049852 | EF468812 | EF468914 | EF468752 |
O. sinensis | EFCC 7287 | JN049854 | EF468827 | EF468924 | EF468767 |
O. stylophor | OSC 111000 | JN049828 | DQ518766 | DQ522433 | DQ522337 |
Orbiocrella petchii | NHJ 6209 | - | EU369039 | EU369081 | EU369023 |
O. petchii | NHJ 6240 | - | EU369038 | EU369082 | EU369022 |
Papiliomyces liangshanensis | EFCC 1452 | - | EF468815 | - | EF468756 |
P. liangshanensis | EFCC 1523 | - | EF468814 | EF468918 | EF468755 |
P. shibinensis | GZUH SB13050311 | NR154178 | - | - | KR153589 |
Parametarhizium changbaiense | CGMCC 19143 | MN589741 | MN589994 | MT921829 | MN908589 |
P. hingganense | CGMCC 19144 | MN055703 | MN061635 | MT939494 | MN065770 |
Parepichloe cinerea | Ne-01 | AB065425 | - | - | - |
Peethambara spirostriata | CBS110115 | - | AY489724 | EF692516 | AY489619 |
Periglandula ipomoeae | IasaF13 | - | - | KP689517 | KP689568 |
Pochonia boninensis | JCM 18597 | AB709858 | AB709831 | AB758693 | AB758463 |
P. globispora | CBS 203.86 | DQ516079 | - | - | - |
Pseudometarhizium araneogenum | DY101741 | MW730532 | MW730618 | MW753030 | MW753037 |
P. araneogenum | DY101742 | MW730534 | MW730619 | MW753031 | MW753038 |
P. araneogenum | DY101801 | MW730536 | MW730623 | MW753032 | MW753039 |
P. araneogenum | DY101802 | MW730545 | MW730625 | - | MW753040 |
P. lepidopterorum | SD05361 | MW730543 | MW730624 | - | MW753041 |
P. lepidopterorum | SD05362 | MW730611 | MW730629 | - | MW753042 |
Purpureocillium lavendulum | FMR 10376 | - | FR775489 | - | FR775516 |
P. lilacinus | CBS 284.36 | - | - | EF468941 | EF468792 |
Purpureomyces maesotensis | BCC 88441 | MN781916 | MN781877 | MN781824 | MN781734 |
P. maesotensis | BCC 85349 | MN781928 | MN781872 | - | MN781729 |
P. maesotensis | BCC 89300 | MN781917 | MN781876 | - | MN781733 |
Regiocrella camerunensis | ARSEF 7682 | - | DQ118735 | - | DQ118743 |
Romanoa terricola | WCM_17 | KP794435 | - | - | - |
R. terricola | WCM_18 | KP794436 | - | - | - |
Rosasphaeria moravica | LMM | JF440985 | - | JF440986 | JF440987 |
Rotiferophthora angustispora | CBS 101437 | - | AF339535 | DQ522460 | AF543776 |
Roumegueriella rufula | CBS 346.85 | - | DQ518776 | DQ522461 | DQ522355 |
R. rufula | GJS 91-164 | - | EF469082 | EF469116 | EF469070 |
Samuelsia chalalensis | CUP 067856 | - | EU392637 | - | EU392691 |
S. mundiveteris | BCC 40021 | - | GU552152 | - | GU552145 |
S. rufobrunnea | CUP 067858 | - | AY986918 | - | AY986944 |
Sarocladium bacillisporum | CBS 425.67 | NR_145039 | MH870718 | - | - |
S. dejongiae | CBS 144929 | NR_161153 | NG_067854 | - | - |
S. implicatum | CBS 959.72 | HG965023 | MH878470 | - | - |
S. subulatum | CBS 217.35 | MH855652 | NG_070566 | - | - |
S. terricola | CBS 243.59 | MH857853 | MH869389 | - | - |
Shimizuomyces paradoxus | EFCC 6279 | JN049847 | EF469084 | EF469117 | EF469071 |
S. paradoxus | EFCC 6564 | - | EF469083 | EF469118 | EF469072 |
Simplicillium lamellicola | CBS 116.25 | AJ292393 | MH866307 | DQ522462 | DQ522356 |
S. lanosoniveum | CBS 101267 | AJ292395 | - | DQ522463 | DQ522357 |
S. lanosoniveum | CBS 704.86 | AJ292396 | AF339553 | DQ522464 | DQ522358 |
Sordaria fimicola | AFTOL-ID 216 | DQ518178 | - | - | DQ518175 |
Stachybotrys eucylindrospora | ATCC 18851 | JN942887 | JN938869 | - | - |
Sphaerostilbella aureonitens | GJS74-87 | FJ442633 | HM466683 | FJ442763 | - |
S. berkeleyana | GJS82-274 | - | U00756 | - | AF543783 |
S. chlorohalonata | DAOM 235557 | JN942888 | JN938870 | - | - |
Stachybotrys microspora | CBS 186.79 | - | - | DQ676580 | DQ676604 |
Stephanonectria keithii | GJS92-133 | - | AY489727 | - | AY489622 |
Sungia yongmunensis | EFCC 2131 | JN049856 | EF468833 | - | EF468770 |
S. yongmunensis | EFCC 2135 | - | EF468834 | - | EF468769 |
Tilachlidium brachiatum | CBS 506.67 | KM231839 | HQ232177 | KM232415 | KM231976 |
T. brachiatum | CBS 363.97 | KM231838 | KM231719 | KM232414 | KM231975 |
Tolypocladium inflatum | SCALT1007-002 | KC963032 | - | - | - |
Trichoderma aggressivum | CBS100525 | - | JN939837 | JQ014130 | - |
T. arundinaceum | ATCC 90237 | EU330927 | - | EU338326 | EU338291 |
T. viride | GJS89-127 | - | AY489726 | - | AY489621 |
Trichosphaerella ceratophora | CBS 130.82 | KM231847 | KM231727 | KM232423 | KM231983 |
Trichothecium indicum | CBS 123.78 | - | NG_057651 | - | - |
T. roseum | DUCC 502 | JN937590 | JX458860 | - | - |
Tyrannicordyceps fratricida | TNS-F 19011 | JQ349068 | JQ257023 | JQ257021 | JQ257028 |
Ustilaginoidea dichromonae | MRL IB9228 | - | - | JQ257018 | JQ257025 |
U. virens | ATCC 16180 | - | - | JQ257019 | JQ257026 |
U. virens | MAFF 240421 | - | JQ257011 | JQ257017 | JQ257026 |
Valetoniellopsis laxa | GJS96-174 | - | AY015635 | AY015638 | - |
Yosiokobayasia kusanagiensis | TNS-F18494 | - | JF415972 | - | JF416014 |
Lasergene software (version 6.0, DNASTAR) was applied for the editing of DNA sequences in this study. The ITS, LSU, RPB2 and TEF sequences were downloaded from GenBank, based on
The combined genes were analyzed using Bayesian inference (BI) and maximum likelihood (ML) methods. For BI, a Markov chain Monte Carlo (MCMC) algorithm was used to generate phylogenetic trees with Bayesian probabilities using MrBayes v.3.2 (
Phylogenetic trees were generated in analysis 1 (to determine the family placement of the new strains) and analysis 2 (to determine the establishment of the new genera in Clavicipitaceae) (Figs
A maximum-likelihood phylogenetic tree of Neoaraneomyces and Pseudometarhizium in the order Hypocreales based on multigene dataset (ITS, LSU, RPB2 and TEF). Statistical support values (≥ 50%/0.5) are shown at the nodes for ML bootstrap support/BI posterior probabilities. The new taxa are in bold.
Analysis 1: The selected model for ML analysis was TIM2+F+I+G4. The final value of the highest scoring tree was –37,716.4419, which was obtained from an ML analysis of the dataset (ITS+LSU +RPB2+TEF). The parameters of the rate heterogeneity model used to analyze the dataset were estimated using the following frequencies: A = 0.2282, C = 0.2768, G = 0.2781, T = 0.2169; substitution rates AC = 1.4435, AG = 2.2494, AT = 1.4435, CG = 1.0000, CT = 5.4319 and GT = 1.0000, as well as the gamma distribution shape parameter α = 0.6711. The selected models for BI analysis were GTR+F+I+G4 (ITS, LSU and RPB2), and GTR+F+G4 (TEF). The phylogenetic trees (Fig.
Analysis 2: The final value of the highest scoring tree was –29,543.7455, which was obtained from the ML analysis of the dataset (ITS+LSU+RPB2+TEF). The parameters of the GTR model used to analyze the dataset were estimated based on the following frequencies: A = 0.2303, C = 0.2800, G = 0.2801, T = 0.2096; substitution rates AC = 1.0000, AG = 3.0029, AT = 1.0000, CG = 1.0000, CT = 7.0264 and GT = 1.0000, as well as the gamma distribution shape parameter α = 0.3934. The selected models for BI analysis were GTR+F+I+G4 (ITS+LSU+TEF) and SYM+G4 (RPB2). The phylogenetic trees (Fig.
A maximum-likelihood phylogenetic tree of two new genera Neoaraneomyces and Pseudometarhizium and 39 genera in Clavicipitaceae, based on multigene dataset (ITS, LSU, RPB2 and TEF). Statistical support values (≥ 50%/0.5) are shown at the nodes for ML bootstrap support/BI posterior probabilities. The new taxa are in bold.
Referring to a new genus parasitic on spiders
Neoaraneomyces araneicola W.H. Chen, Y.F. Han, J.D. Liang & Z.Q. Liang.
Colonies on PDA, white to grey, reverse yellowish. Conidiophores mononematous, usually arising from aerial hyphae, phialides solitary or in groups of two to three. Phialides emerging laterally from hyphae, forming a compact hymenium, abruptly narrowing into a neck. Conidia in chains, one-celled, hyaline, fusiform or ellipsoidal.
Spider (Araneidae)
Near roads and located on or under rocks.
Unknown.
The genera Akanthomyces, Beauveria, Clonostachys, Cordyceps, Engyodontium de Hoog, Gibellula, Hevansia, Hirsutella, Hymenostilbe, Lecanicillium W. Gams & Zare, Ophiocordyceps Petch, Purpureocillium, and Torrubiella Boud. have been reported as spider-pathogenic fungi in Hypocreales (
Duyun City (26°21'27.96"N, 107°22'48.22"E), Qiannan Buyi and Miao Autonomous Prefecture, Guizhou, China. On a dead spider (Araneae), 1 October 2019, Wanhao Chen, GZAC DY10171 (holotype); ex-type living cultures, DY101711.
Spider host completely covered by white mycelium. Conidiophores mononematous, arising from the lateral hyphae. Colonies on PDA, 3.0–3.2 cm diam. after 14 d at 25 °C, white to pale grey, powdery, consisting of a basal felt, reverse yellowish. Prostrate hyphae smooth, septate, hyaline, 1.4–2.2 μm diam. Erect conidiophores usually arising from aerial hyphae. Phialides single or in groups of two to three, 8.9–23.8 × 1.1–1.6 μm, with a cylindrical to ellipsoidal basal portion, tapering into a short distinct neck. Conidia in chains, hyaline, fusiform to ellipsoidal, one-celled, 2.9–4.4 × 1.3–2.0 μm. Sexual state not observed.
Spider (Araneidae).
Near the road, located on or under rocks.
Referring to the ability to colonize spiders.
Duyun City (26°21'27.96"N, 107°22'48.22"E), Qiannan Buyi and Miao Autonomous Prefecture, Guizhou, China. On a dead spider (Araneae), 1 October 2019, Wanhao Chen, DY101712.
Referring to Metarhizium-like colony.
Pseudometarhizium araneogenum W.H. Chen, Y.F. Han, J.D. Liang & Z.Q. Liang.
Colonies on PDA, light green, reserve brown to light brown. Conidiophores synnematous or mononematous, erect, scattered. Phialides emerging laterally from synnemata or hyphae, forming a compact hymenium, abruptly narrowing into a helical neck. Conidia, one-celled, fusiform or ellipsoidal.
Spider (Araneae).
Near the road, located on or under rocks, or on the underside of leaves of broad-leaved plant species.
Unknown.
The light green colonies of Pseudometarhizium are similar to those of Metarhizium species. However, Pseudometarhizium is easily distinguished by the combined datasets (ITS+LSU+RPB2+TEF), and had a close relationship with Metarhiziopsis. Pseudometarhizium can be easily distinguished from Metarhiziopsis by its paecilomyces-like structure and absence of sporodochia.
Duyun City (26°21'27.96"N, 107°22'48.22"E), Qiannan Buyi and Miao Autonomous Prefecture, Guizhou, China. On a dead spider (Araneae), 1 October 2019, Wanhao Chen, GZAC DY10180 (holotype), ex-type living cultures, DY101801.
Spider host completely covered by white mycelium. Conidiophores mononematous, arise from the lateral hyphae. Colonies irregularly on PDA, 1.8–2.8 cm diam. after 14 d at 25 °C, white, consisting of a basal felt, floccose hyphal overgrowth, reverse yellowish to pale brown or green. Prostrate hyphae smooth, septate, hyaline, 1.0–1.2 μm diam. Erect conidiophores usually arising from aerial hyphae. Phialides solitary or in groups of two, 8.3–23.3 × 1.3–2.2 μm, with a cylindrical basal portion, tapering into a short distinct neck. Conidia in chains, hyaline, fusiform, one-celled, 3.4–5.8 × 1.4–1.8 μm. Sexual state not observed.
Spider (Araneidae).
Near the road, located on or under rocks.
Referring to the ability to colonize spiders.
Duyun City (26°21'27.96"N, 107°22'48.22"E) Qiannan Buyi and Miao Autonomous Prefecture, Guizhou, China. On a dead spider (Araneae), 1 October 2019, Wanhao Chen, GZAC DY10174, living cultures, DY101741, DY101742.
Pseudometarhizium araneogenum distinguished from P. lepidopterorum, which has longer phialides (21.2–33.7 × 1.1–1.4 μm) and smaller conidia (3.1–4.3 × 1.3–1.5 μm).
Sandu County (25°57'22.21"N, 107°57'54.69"E), Qiannan Buyi and Miao Autonomous Prefecture, Guizhou, China. On a pupa (Lepidoptera), 1 May 2019, Wanhao Chen, GZAC SD0536 (holotype), ex-type living cultures, SD05361.
Description. Host pupa completely covered by white mycelium. Conidiophores arising from lateral hyphae of the synnemata. Colonies on PDA, 1.4–2.0 cm diam. after 14 d at 25 °C, white, consisting of a basal felt and cottony, floccose hyphal overgrowth, reverse yellowish to pale green. Prostrate hyphae smooth, septate, hyaline, 1.0–2.0 μm diam. Erect conidiophores usually arising from aerial hyphae. Phialides solitary or in groups of two to three, 21.2–33.7 × 1.1–1.4 μm, with a cylindrical basal portion, tapering into a short distinct neck. Conidia in chains, hyaline, fusiform, one-celled, 3.1–4.3 × 1.3–1.5 μm. Sexual state not observed.
Pupa (Lepidoptera).
On the underside of leaves of broad-leaved plant species.
Sandu County (25°57'22.21"N, 107°57'54.69"E) Qiannan Buyi and Miao Autonomous Prefecture, Guizhou, China. On a pupa (Lepidoptera), 1 May 2019, Wanhao Chen, SD05362.
Referring to its insect host, order Lepidoptera.
Pseudometarhizium lepidopterorum distinguished from P. araneogenum, which has shorter phialides (8.3–23.3 × 1.3–2.2 μm) and longer conidia (3.4–5.8 × 1.4–1.8 μm).
Paecilomyces-like conidiogenous structure is common throughout the Hypocreales (
Currently, Clavicipitaceae contains 49 genera (
The evolutionary dynamics of fungi and their hosts are usually described either through coevolution or host shifts (
Both mononematous and synnematous conidiophores were reported in natural conditions in the present study. Synnematous entomopathogenic fungi (such as Gibellula spp.) are found on the abaxial leaf surfaces of shrubbery, forest floors and shallow soil layers (
This work was funded by National Natural Science Foundation of China (31860002), High-level Innovative Talents Training Object in Guizhou Province (Qiankehepingtairencai [2020]6005), Science and Technology Foundation of Guizhou Province (Qiankehejichu [2020]1Y060), Program of Innovative Scientific and technological Talent Team of Guizhou Province (2020-5010), Construction Program of Guizhou Engineering Research Center (Qian Fa Gai Gao Ji 2020-896), Guizhou Science and Technology Support Project (Qiankehezhicheng [2019]2776).
Table S1
Data type: COL.
Explanation note: Primers information for 5 DNA sequences.