occurrenceID	taxonID	catalogNumber	collectionCode	institutionCode	typeStatus	verbatimLabel	sex	individualCount	eventDate	recordedBy	recordNumber	decimalLatitude	decimalLongitude	minimumElevationInMeters	maximumElevationInMeters	minimumDepthInMeters	maximumDepthInMeters	country	stateProvince	municipality	locality	references	basisOfRecord
F80B87F8FFC16C22FF62F90204A1FECA.mc.C0CA3CB3FFC46C20FF32F99F0164F94E	F80B87F8FFC16C22FF62F90204A1FECA.taxon					Although we have been able to collect only nymphs (i. e., we could not confirm their adult form and characteristics), some specimens collected from other areas of the Tohoku District (i. e., from Aomori, Iwate, Akita, Miyagi, Yamagata and Fukushima Prefectures; Table 1, Fig. 1) and the northernmost parts of Niigata Prefecture		1											Aomori, Iwate, Akita, Miyagi, Yamagata and Fukushima		Tohoku District	http://treatment.plazi.org/id/F80B87F8FFC16C22FF62F90204A1FECA	MaterialCitation
F80B87F8FFC16C22FF62F90204A1FECA.mc.C0CA3CB3FFC46C20FAECF967051FF89A	F80B87F8FFC16C22FF62F90204A1FECA.taxon					belonged to the same genetic clade (according to their mtDNA COI, 16 S rRNA and nDNA ITS 2 gene sequences) as the specimens from Mt. Gassan (type locality), and some specimens collected from sites around Mt. Gassan. Detailed data of their genetic relationships are discussed later in the section titled ‘ Phylogenetic relationships’. Thus, this new mayfly species seems to have a comparatively wide distribution in the Tohoku District and northernmost parts of Niigata Prefecture		1											Niigata	Mt. Gassan. Detailed	Phylogenetic	http://treatment.plazi.org/id/F80B87F8FFC16C22FF62F90204A1FECA	MaterialCitation
F80B87F8FFC16C22FF62F90204A1FECA.mc.C0CA3CB3FFC46C20FE35F8BF0516F82F	F80B87F8FFC16C22FF62F90204A1FECA.taxon	CBM-ZI 151242-151244			holotype	The holotype (male adult), allotype (female adult) and paratype (nymph), were preserved with 70 % ethanol and deposited in the collections of the Natural History Museum and Institute, Chiba (CBM-ZI 151242 − 151244)		1											Chiba	Natural History Museum	Institute	http://treatment.plazi.org/id/F80B87F8FFC16C22FF62F90204A1FECA	MaterialCitation
F80B87F8FFC16C22FF62F90204A1FECA.mc.C0CA3CB3FFC56C21FF32F8E8012FF866	F80B87F8FFC16C22FF62F90204A1FECA.taxon		T		holotype	Holotype: Male adult (imago), a small freshwater branch of the ‘ Tachiya-zawa-gawa’ River located amongst the northern foothills of Mt. Gassan; Shonai-machi Town, Yamagata Prefecture, Honshu, Japan (locality No. 14); collection on 24 - VI- 2010 (fixation on 25 - VI- 2010); K. Tojo, T. Suzuki and A. Kume leg., CMB-ZI 151242		1	2010-06-24	K. Tojo & Suzuki & A. Kume								Japan	Yamagata	Shonai-machi Town	Male	http://treatment.plazi.org/id/F80B87F8FFC16C22FF62F90204A1FECA	MaterialCitation
F80B87F8FFC16C22FF62F90204A1FECA.mc.C0CA3CB3FFC56C21FA96F8B00124F82E	F80B87F8FFC16C22FF62F90204A1FECA.taxon		T		allotype	Allotype: One female adult (imago) with eggs; same data as holotype for locality and collectors; collection on 24 - VI- 2010 (emergence and molt to adult on 4 - VII- 2010 in laboratory; fixation on 5 - VII- 2010; CMB-ZI 151243.		1	2010-06-24	K. Tojo & Suzuki & A. Kume								Japan	Yamagata	Shonai-machi Town	Male	http://treatment.plazi.org/id/F80B87F8FFC16C22FF62F90204A1FECA	MaterialCitation
F80B87F8FFC16C22FF62F90204A1FECA.mc.C0CA3CB3FFC56C22FAAEF8780678FF21	F80B87F8FFC16C22FF62F90204A1FECA.taxon		T		allotype	Paratype: One ultimate instar nymph; same as holotype for locality and collectors; collection on 24 - VI- 2010; fixation on 30 - VI- 2010; CMB-ZI 151244.		1	2010-06-24	K. Tojo & Suzuki & A. Kume								Japan	Yamagata	Shonai-machi Town	Male	http://treatment.plazi.org/id/F80B87F8FFC16C22FF62F90204A1FECA	MaterialCitation
F80B87F8FFC16C22FF62F90204A1FECA.mc.C0CA3CB3FFC66C22FDE0FF7D04A1FECA	F80B87F8FFC16C22FF62F90204A1FECA.taxon		T		allotype	Other materials: Two male adults, two female adults and two nymphs (same data as holotype for locality and collectors) were preserved with 70 % ethanol and deposited in the collections of the Shinshu University Museam. Other materials were deposited in the private collection of the corresponding author (KT).	female	1	2010-06-24	K. Tojo & Suzuki & A. Kume								Japan	Yamagata	Shonai-machi Town	Male	http://treatment.plazi.org/id/F80B87F8FFC16C22FF62F90204A1FECA	MaterialCitation
