<documentID-CLB-Dataset="292061"ID-DOI="http://dx.doi.org/10.3897/mycokeys.103.107935"ID-GBIF-Dataset="57c46294-d679-4d8b-a7ed-d5dec91bd6f3"ID-PMC="PMC10995610"ID-Pensoft-Pub="1314-4049-103-129"ID-Pensoft-UUID="A42A1B46EC1F5C4AA8A83A1514EC444E"ID-PubMed="38584717"ModsDocID="1314-4049-103-129"checkinTime="1711652827384"checkinUser="pensoft"docAuthor="Vadthanarat, Santhiti, Raghoonundon, Bhavesh, Lumyong, Saisamorn & Raspe, Olivier"docDate="2024"docId="969DD59ED8FC5B418C3D421C9B13F68C"docLanguage="en"docName="MycoKeys 103: 129-165"docOrigin="MycoKeys 103"docPubDate="2024-03-28"docSource="http://dx.doi.org/10.3897/mycokeys.103.107935"docTitle="Rostrupomyces sisongkhramensis Vadthanarat, Raghoonundon & Raspe 2024, comb. nov."docType="treatment"docVersion="4"id="A42A1B46EC1F5C4AA8A83A1514EC444E"lastPageNumber="129"masterDocId="A42A1B46EC1F5C4AA8A83A1514EC444E"masterDocTitle="Rostrupomyces, a new genus to accommodate Xerocomus sisongkhramensis, and a new Hemileccinum species (Xerocomoideae, Boletaceae) from Thailand"masterLastPageNumber="165"masterPageNumber="129"pageNumber="129"updateTime="1732763702600"updateUser="ExternalLinkService">
<mods:titleid="39FDA6A2CE16CCDDE409BA090CCA2A71">Rostrupomyces, a new genus to accommodate Xerocomus sisongkhramensis, and a new Hemileccinum species (Xerocomoideae, Boletaceae) from Thailand</mods:title>
<mods:affiliationid="45202A1B70A8E33F1004E5E6685CD504">School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand & Department of Biological Science, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand</mods:affiliation>
<mods:affiliationid="B6E5FA77984F8B6B86DBF6EDCD9F6D38">Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand & Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand</mods:affiliation>
<mods:affiliationid="C33AC1F30565F1F86CC39A0C10B3CF54">School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand & Academy of Science, The Royal Society of Thailand, Bangkok, Thailand & Meise Botanic Garden, Nieuwelaan 38, 1860 Meise, Belgium</mods:affiliation>
<taxonomicNameid="7CF7F47CA25DF3590D7B7897ECA5C1E5"LSID="969DD59E-D8FC-5B41-8C3D-421C9B13F68C"authority="(Khamsuntorn, Pinruan & Luangsa-ard) Vadthanarat, Raghoonundon & Raspe"authorityName="Vadthanarat, Raghoonundon & Raspe"authorityYear="2024"baseAuthorityName="Vadthanarat & Raghoonundon & Lumyong & Raspé"baseAuthorityYear="2024"class="Agaricomycetes"family="Boletaceae"genus="Rostrupomyces"higherTaxonomySource="CoL"kingdom="Fungi"lsidName="Rostrupomyces sisongkhramensis"order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="species"species="sisongkhramensis"status="comb. nov.">
<figureCitationid="3B645849E8F9D728D78083F4E389B870"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Fresh basidiomata of Rostrupomyces sisongkhramensis A OR 0915 B OR 0919 C OR 1004 D SV 0155, white pores surface in young basidioma (white arrow) E SV 0219 F SV 0225. Scale bars: 1 cm (A-F)."figureDoi="10.3897/mycokeys.103.107935.figure3"httpUri="https://binary.pensoft.net/fig/1011680"pageId="0"pageNumber="129">Figs 3</figureCitation>
<figureCitationid="0E9ECB22063853E3C7E9DB0921A7A2AF"captionStart="Figure 4"captionStartId="F4"captionText="Figure 4. Microscopic features of Rostrupomyces sisongkhramensis A basidiospores B basidia C cheilocystidia D pleurocystidia E pileipellis F stipitipellis showing a cluster of narrowly clavate to clavate cells which slightly scattered on the stipe surface. Scale bars: 10 µm (A-D); 25 µm (D-E); 50 µm (E-F). All line drawings were made from SV 0155."figureDoi="10.3897/mycokeys.103.107935.figure4"httpUri="https://binary.pensoft.net/fig/1011681"pageId="0"pageNumber="129">, 4</figureCitation>
<figureCitationid="D01F3B9CA2776C5838883F00D59636F7"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Scanning electron micrographs of basidiospores A-B Rostrupomyces sisongkhramensis (SV 0155) C-D Hemileccinum inferius (SV 0282)."figureDoi="10.3897/mycokeys.103.107935.figure5"httpUri="https://binary.pensoft.net/fig/1011682"pageId="0"pageNumber="129">, 5A-B</figureCitation>
<taxonomicNameid="BA52BFAB5469BACF183B9A63598357D0"authorityName="Vadthanarat & Raghoonundon & Lumyong & Raspé"authorityYear="2024"baseAuthorityName="Vadthanarat & Raghoonundon & Lumyong & Raspé"baseAuthorityYear="2024"class="Agaricomycetes"family="Boletaceae"genus="Xerocomus"higherTaxonomySource="CoL"kingdom="Fungi"lsidName="Xerocomus sisongkhramensis"order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="species"species="sisongkhramensis"status="comb. nov.">Xerocomus sisongkhramensis</taxonomicName>
<taxonomicNameid="10B66B844D3AA5E5845E2D663D00B79F"authorityName="Vadthanarat, Raghoonundon & Raspe"authorityYear="2024"baseAuthorityName="Vadthanarat & Raghoonundon & Lumyong & Raspé"baseAuthorityYear="2024"class="Agaricomycetes"family="Boletaceae"genus="Rostrupomyces"higherTaxonomySource="CoL"kingdom="Fungi"lsidName="Rostrupomyces sisongkhramensis"order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="species"species="sisongkhramensis">
is characterised by having dark to reddish brown, becoming brown to grayish orange pileus, with rugulose to subrugulose, finely tomentose to tomentose surface; yellowish to orange white, subscabrous, longitudinally fissurate stipe surface, with moderately scattered brown to dark brown to reddish brown granulose squamules; yellow hymenophore; unchanging color in any parts; yellowish brown spore print; and broadly ellipsoid to ellipsoid smooth basidiospores.
at first rugulose especially near the margin then subrugulose in age, dull, dry to moist, finely tomentose to tomentose covered with greenish yellow (3A3-4, 3B4) matted hyphae at places (especially when young), at first dark brown to reddish brown (6-8F4-8), becoming light brown to brown to grayish orange (6D/E5-6, 5B4-5) on light yellow to brownish orange (4A3-5, 5C4) background in age, gradually paler to the margin, unchanging when bruised;
(3)5-10(14) mm thick half-way to the margin, at first firm then soft in age, color distribution even, at first off-white, slightly brownish (7D/E4-5) near the pileipellis, then yellowish to orange white (4-5A2) or occasionally yellowish (3A3-4) above the hymenium especially in age, unchanging when cut.
subscabrous longitudinally fissurate, slightly shiny, yellowish white to pale yellow to orange white (3A3 to 4A2 to 5A2), occasionally pale yellow (3A3-4) near the cap, with moderately scattered brown to dark brown to reddish brown (7D/E/F4-7) granulose squamules, unchanging when bruised;
solid, firm, at first white (1A1) becoming off-white to yellowish white (4A2) occasionally pale yellow (3A3-4) especially in the above part near the stipe surface in age, yellowish to orange gray (4-5B2-3) virgate at places, unchanging when cut.
tubulate, slightly depressed to depressed around the stipe, with slightly decurrent tooth, sometimes almost free, mostly segmentiform to subventricose.
(3)4-13 mm long half-way to the margin, at first pale yellow (4A3) then grayish yellow (4B3) when mature, separable from the pileus context, unchanging when cut.
0.2-0.8(1.3) mm wide half-way to the margin, irregularly arranged, roundish then subangular to angular in age; topography subregular, composite pores frequent; color distribution even, when young white (1A1) then yellowish white (4A2) becoming grayish yellow (4B3-5) infrequently with reddish brown spots (7-8E/F8) at places in age, unchanging when touched.
: KOH, brownish orange on pileus, yellowish to pale dull orange on pileus context and stipe surface, none or yellowish on stipe context, yellowish brown to brownish orange on hymenium; NH4OH, yellowish to brownish orange (occasionally with purple aura) on pileus, yellowish to pale orange on stipe surface, yellowish to brownish on hymenium, none or yellowish on pileus context and stipe context.
an intricate trichoderm, 70-130 mm thick, made of moderately interwoven (when young) to loosely interwoven in age, thin-walled, smooth, hyaline hyphae 4-18 mm wide, branching and anastomosing at places; terminal cells 12-65
Solitary or in small groups (up to 4 basidiomata), or fasciculate by 2 to 3 basidiomata, on sandy loam to sandy clay loam soil in open dry dipterocarp forest and dipterocarp forest dominated by
<taxonomicNameid="1CC29AB24132D0C94C530332F4E98898"authorityName="Vadthanarat & Raspe"authorityYear="2024"class="Agaricomycetes"family="Dipterocarpaceae"higherTaxonomySource="CoL"kingdom="Fungi"lsidName=""order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="family">Dipterocarpaceae</taxonomicName>
trees. Currently known from the type locality (Nakhon Phanom province), Sisaket and Ubon Ratchathani provinces in northeastern Thailand, and also in Chiang Mai and Chiang Rai provinces in northern Thailand.
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,
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roadside market,
<collectingDateid="2A54AD8703EC8999AC2D79D54DF7DB6B"value="2016-09-17">17 September 2016</collectingDate>
The BLAST result based on ITS sequence obtained from one of the examined specimens (voucher SV0155, GenBank accession number PP354891) was 100% identical to the holotype of
Morphological characters of our collections mostly fit the original description of the species. However, some variations were observed between ours and the original description as follows:
while we could observe them in our collections; they were narrowly fusiform to fusiform with obtuse apex or narrowly utriform, thin-walled. The protologue mentioned broadly clavate to subclavate (40-60
considered as caulocystidia were what we described as undifferentiated terminal cells of the stipitipellis. In the species protologue, the pileipellis and stipitipellis were described as composed of thick-walled hyphae (no measurement mentioned). However, only thin-walled hyphae were observed in our collections.
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Mei-Xiang Li, Zhu L. Yang & G. Wu, which was recently described from China. The two species share some morphological characters including basidiome size and color, scattering of granular squamules on the stipe surface, pale yellow to grayish yellow hymenophore that is depressed around the stipe apex, and unchanging color in any parts. However,
differs by its strikingly venose pileus surface, finer granular squamules on the stipe surface, and subfusiform basidiospores ornamented with irregular warts under SEM (
<bibRefCitationid="A3F161FB033CBEE8B8A532E9D596376E"DOI="https://doi.org/10.1007/s13225-023-00529-0"author="Liu, SL"journalOrPublisher="Fungal Diversity"pageId="0"pageNumber="129"pagination="1 - 216"refId="B41"refString="Liu, SL, Wang, XW, Li, GJ, Deng, CY, Rossi, W, Leonardi, M, Liimatainen, K, Kekki, T, Niskanen, T, Smith, ME, Ammirati, J, Bojantchev, D, Abdel-Wahab, MA, Zhang, M, Tian, E, Lu, Y-Z, Zhang, J-Y, Ma, J, Dutta, AK, Acharya, K, Du, T-Y, Xu, J, Kim, JS, Lim, YW, Gerlach, A, Zeng, N-K, Han, Y-X, Razaghi, P, Raza, M, Cai, L, Calabon, MS, Jones, EBG, Saha, R, Kumar, TKA, Krishnapriya, K, Thomas, A, Kaliyaperumal, M, Kezo, K, Gunaseelan, S, Singh, SK, Singh, PN, Lagashetti, AC, Pawar, KS, Jiang, S, Zhang, C, Zhang, H, Qing, Y, Bau, T, Peng, X-C, Wen, T-C, Ramirez, NA, Niveiro, N, Li, M-X, Yang, ZL, Wu, G, Tarafder, E, Tennakoon, DS, Kuo, C-H, da Silva, TM, Souza-Motta, CM, Bezerra, JDP, He, G, Ji, X-H, Suwannarach, N, Kumla, J, Lumyong, S, Wannathes, N, Rana, S, Hyde, KD, Zhou, L-W, 2024. Fungal diversity notes 1717-1817: Taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 124 (1): 1 - 216, DOI: https://doi.org/10.1007/s13225-023-00529-0"title="Fungal diversity notes 1717 - 1817: Taxonomic and phylogenetic contributions on genera and species of fungal taxa."url="https://doi.org/10.1007/s13225-023-00529-0"volume="124"year="2024">Liu et al. 2024</bibRefCitation>
<taxonomicNameid="96A5B0B77FC9EEB54A961AD15F32B038"authorityName="Vadthanarat, Raghoonundon & Raspe"authorityYear="2024"baseAuthorityName="Vadthanarat & Raghoonundon & Lumyong & Raspé"baseAuthorityYear="2024"class="Agaricomycetes"family="Boletaceae"genus="Rostrupomyces"higherTaxonomySource="CoL"kingdom="Fungi"lsidName="Rostrupomyces sisongkhramensis"order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="species"species="sisongkhramensis">
den Bakker & Noordel., which has a similar shade of pileus color (light orange), whitish stipe covered with whitish squamules when young to reddish brown in age. However,
can be differentiated by having an inflexed margin which exceeds the hymenophore by up to 4 mm, yellowish white to very pale brown hymenophore that becomes brownish when bruised, a clear blue discoloration of the stipe base when touched, context staining vinaceous then grayish to blackish when cut, smooth fusiform basidiospores, distribution in Europe, and association with
<bibRefCitationid="0232F2CDDC45D6310D2D757AB048F5A0"author="den Bakker, HC"journalOrPublisher="Persoonia"pageId="0"pageNumber="129"pagination="511 - 587"refId="B12"refString="den Bakker, HC, Noordeloos, ME, 2005. A revision of European species of Leccinum Gray and notes on extralimital species. Persoonia 18: 511 - 587"title="A revision of European species of Leccinum Gray and notes on extralimital species."volume="18"year="2005">den Bakker and Noordeloos 2005</bibRefCitation>
<taxonomicNameid="4A8EBBE2061B648E04DCFD1D8CC013BA"authorityName="Vadthanarat, Raghoonundon & Raspe"authorityYear="2024"baseAuthorityName="Vadthanarat & Raghoonundon & Lumyong & Raspé"baseAuthorityYear="2024"class="Agaricomycetes"family="Boletaceae"genus="Rostrupomyces"higherTaxonomySource="CoL"kingdom="Fungi"lsidName="Rostrupomyces sisongkhramensis"order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="species"species="sisongkhramensis">
<taxonomicNameid="2D1F98EF333066FD91A8D33341D4D654"authorityName="Vadthanarat & Raspe"authorityYear="2024"class="Agaricomycetes"family="Boletaceae"genus="Rostrupomyces"higherTaxonomySource="CoL"kingdom="Fungi"lsidName="Rostrupomyces"order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="genus">
by having grayish red to pastel red to reddish brown pileus; even stipe surface with scattered bright yellow to yellowish white to orange to light brown minute squamules; shorter tubes especially when young; golden yellow hymenophore; and the striking dark ruby spore print (
<bibRefCitationid="606CF6EE77364AD280F1858002771774"DOI="https://doi.org/10.3390/jof8030278"author="Vadthanarat, S"journalOrPublisher="Journal of Fungi"pageId="0"pageNumber="129"pagination=": 278"refId="B68"refString="Vadthanarat, S, Raspe, O, Lumyong, S, 2022. Rubinosporus auriporus gen. et sp. nov. (Boletaceae: Xerocomoideae) from tropical forests of Thailand, producing unusual dark ruby spore deposits. Journal of Fungi 8 (3): 278, DOI: https://doi.org/10.3390/jof8030278"title="Rubinosporus auriporus gen. et sp. nov. (Boletaceae: Xerocomoideae) from tropical forests of Thailand, producing unusual dark ruby spore deposits."url="https://doi.org/10.3390/jof8030278"volume="8"year="2022">Vadthanarat et al. 2022</bibRefCitation>
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<taxonomicNameid="71379BB793785CCF9214B99B9EC9C1EF"authorityName="Vadthanarat, Raghoonundon & Raspe"authorityYear="2024"class="Agaricomycetes"family="Pinaceae"genus="Hemileccinum"higherTaxonomySource="CoL"kingdom="Fungi"lsidName="Hemileccinum inferius"order="Boletales"pageId="0"pageNumber="129"phylum="Basidiomycota"rank="species"species="inferius">
