東京大学総合研究博物館動物部門所蔵のヒル類（環帯綱：ヒル亜綱）標本リスト
中野隆文1) ・ 伊藤哲也2)
1)京都大学大学院 理学研究科 動物学教室
2)日本海洋生物研究所 札幌支店
タイプ標本： The type series in the UMUTZ
As mentioned above, there is a possibility that the type series of the following eight species could be included in the leech collection of the UMUTZ: 1) Haemadipsa japonica; 2) Hirudo nipponia; 3) Whitmania acranulata; 4) Whitmania edentula; 5) Whitmania pigra; 6) Orobdella ijimai; 7) Orobdella octonaria; and 8) Orobdella whitmani. The former five species were described by Whitman (1884, 1886), and the latter three species by Oka (1895).
Only the type series of O. whitmani remains in the UMUTZ collection. There are eight individuals in the bottle labeled as ‘type specimen’ of O. whitmani. The type series has been examined by Nakano (2010) with the lectotypification, since O. whitmani was described without its type designation (Oka, 1895a).
The other specimen, UMUTZ-Ann-Hir-29, is also labeled as “type specimen” of O. whitmani. In addition, “Nikko” and “Nakagawa” are also written on the original label. In the original description of O. whitmani, this species was not described based on the materials collected from Nikko (Oka, 1895a). On the other hand, Orbdella ijimai was established based on the specimens collected from Nikko by Nakagawa (Oka, 1895a). Therefore, there is a possibility that this specimen would be the syntype of O. ijimai. However, re-identification of this specimen is impossible since the specimen in the bottle has been melted. The status of this specimen thus remains uncertain.
Orobdella octonaria was originally described by Oka (1895a) based on the materials deposited at the University of Tokyo. However, the type series could not be found in the collection. One of the type series of O. octonaria, collected from Hakone, Kanagawa Pref., Japan, was discovered from the collection at the NSMT (Nakano, unpublished data). The collection including the syntype was transferred from Tsukuba University to the NSMT as noted above.
The type series of the following six species are still missing: 1) Haemadipsa japonica; 2) Hirudo nipponia; 3) Whitmania acranulata; 4) Whitmania edentula; 5) Whitmania pigra; and 6) Orobdella ijimai. However, there is no need to designate neotypes for the six species because their identities are not doubtful.
Statuses of the type series of the eight species, which should be deposited in the UMUTZ, are as follows:
Haemadipsa japonica Whitman, 1886: missing.
Hirudo nipponia Whitman, 1886: missing.
Whitmania acranulata Whitman, 1886: missing.
Whitmania edentula Whitman, 1886: missing.
Whitmania pigra Whitman, 1884: missing.
Orobdella ijimai Oka, 1895: missing (? syntype, UMUTZ-Ann-Hir-29).
Orobdella whitmani Oka, 1895: lectotype, UMUTZ-Ann-Hir-5-1; paralectotypes, UMUTZ-Ann-Hir-5-2–8.
Orobdella octonaria: syntype deposited at the NSMT.
The other noteworthy specimens in the UMUTZ
With the exception of the type series of O. whitmani, few notable materials are included in the collection of the UMUTZ. These three specimens are as follows. For more details, see the Remarks section of each specimen.
1) UMUTZ-Ann-Hir-1 Ozobranchus branchiatus (Menzies, 1791): described in Oka (1895b).
2) UMUTZ-Ann-Hir-3 Limnotrachelobdella okae (Moore, 1924): Tribolodon hakonensis (Günther, 1880), a new host record for this species.
3) UMUTZ-Ann-Hir-10 Erpobdella japonica (Pawłowski, 1962): indicating the possibility that the Nephelis sp. in Ijima (1882) would be E. japonica.
