Megarcys ochracea (Klapálek, 1912)

Zhu, Ya-Fei, Rehman, Abdur, Yang, Xiao, Huo, Qing-Bo, Zeng, Liang-Liang, Teslenko, Valentina A. & Du, Yu-Zhou, 2025, New records of stoneflies (Insecta, Plecoptera) from the Greater Khingan Mountains, China, Biodiversity Data Journal 13, pp. e 151489-e 151489 : e151489-

Megarcys ochracea (Klapálek, 1912)

Perlodes (Megarcys) ochracea Klapálek, 1912: 10 .

Matsumuria sapporensis Okamoto, 1912: 16 .

Perlodes yarizawana Uéno, 1931: 99 .

Megarcys ochracea Kasai, 1938: 49 .

Perlodes lepneva Šámal, 1939: 420 .

Arcynopteryx (Megarcys) ochracea Ricker, 1952: 78 .

Megarcys lepneva Illies, 1966: 370 .

Materials

Type status: Other material. Occurrence: recordedBy: Ya-Fei Zhu & Xiao Yang; individualCount: 6; sex: 2 males, 4 females; lifeStage: adult; occurrenceStatus: present; occurrenceID: BF80B542-C585-5297-80BB-0C53BC487D63; Taxon: scientificName: Megarcys ochracea (Klapálek, 1912) ; kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Plecoptera ; family: Perlodidae ; genus: Megarcys ; specificEpithet: ochracea ; taxonomicStatus: valid; Location: continent: Asia; country: China; countryCode: CN; stateProvince: Heilongjiang; locality: Da Hinggan Ling Prefecture, Songlin District, Jinsong town ; maximumElevationInMeters: 480; verbatimLatitude: 51.072427; verbatimLongitude: 124.194817; Identification: identifiedBy: Qing-Bo Huo; Event: year: 2023; month: 6; day: 4; Record Level: language: en; institutionCode: ICYZU

Type status: Other material. Occurrence: recordedBy: Ya-Fei Zhu & Xiao Yang; individualCount: 2; sex: 1 male, 1 female; lifeStage: adult; occurrenceStatus: present; occurrenceID: BF80B542-C585-5297-80BB-0C53BC487D63; Taxon: scientificName: Megarcys ochracea (Klapálek, 1912) ; kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Plecoptera ; family: Perlodidae ; genus: Megarcys ; specificEpithet: ochracea ; taxonomicStatus: valid; Location: continent: Asia; country: China; countryCode: CN; stateProvince: Heilongjiang; locality: Da Hinggan Ling Prefecture, Tahe county ; maximumElevationInMeters: 363; verbatimLatitude: 52.304958; verbatimLongitude: 124.696754; Identification: identifiedBy: Qing-Bo Huo; Event: year: 2023; month: 6; day: 6; Record Level: language: en; institutionCode: ICYZU

Type status: Other material. Occurrence: recordedBy: Ya-Fei Zhu & Xiao Yang; individualCount: 1; sex: 1 males; lifeStage: adult; occurrenceStatus: present; occurrenceID: BF80B542-C585-5297-80BB-0C53BC487D63; Taxon: scientificName: Megarcys ochracea (Klapálek, 1912) ; kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Plecoptera ; family: Perlodidae ; genus: Megarcys ; specificEpithet: ochracea ; taxonomicStatus: valid; Location: continent: Asia; country: China; countryCode: CN; stateProvince: Heilongjiang; locality: Da Hinggan Ling Prefecture, Mohe county, Amuer town ; maximumElevationInMeters: 486; verbatimLatitude: 52.832106; verbatimLongitude: 123.156700; Identification: identifiedBy: Qing-Bo Huo; Event: year: 2023; month: 6; day: 8; Record Level: language: en; institutionCode: ICYZU

Diagnosis

The apex of each hemitergal lobe of the male tergгum 10 is narrow laterally, bluntly rounded; the apex of the epiproct is narrow, rod-shaped; the lateral stylets are dark, tapering towards the apex and pointed. The supracoxal and submental gills are elongated. The posterior margin of the female subgenital plate is divided by a wide notch into two obliquely cut lobes directed medially backwards (Fig. 6 A-D).

Distribution

Russia, Siberia, Far East ( Teslenko and Zhiltzova 2009). Mongolia, North Korea, Japan ( DeWalt et al. 2024). The genus Megarcys Klapálek, 1912 and species M. ochracea are recorded for China for the first time.

Notes

Shi (2022) regarded this genus and species as new records from Jiling Province (Mt. Changbai) in his Master’s degree thesis (data are available from CNKI), but it was not published.

Figures

Figure 6. Megarcys ochracea (Klapálek, 1912). A male head and pronotum; B-C male terminalia, dorsal and ventral view; D female terminalia, ventral view.