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Journal of the Speleological Society of Japan

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Volume 6

Shun-Ichi UENO
A Remarkable New Trechine Beetle Found in a Superficial Subterranean Habitat near Tokyo, Central Japan
  A remarkable new trechine bcetle is described from a superficial subterranean habitat on the western hills of Tokyo, Central Japan, under the name of Paragonotrechus paradoxus gen. et sp. nov. It belongs to the Agonotrechus complex and seems to span the gap between Agonotrechus and Masuzoa. The most striking feature of this species is that it still maintains fully developed inner wings, though it is microphthalmic and wholly depigmented, has achieved a remarkable elongation of appendages, especially of buccal ones, which are exactly comparable to those of aphaenopsian species, and is confined in spaces among gravel and soil about 1 m below the surface.
Shun-Ichi UENO
New Anophthalmic Trechiama (Coleoptera, Trechinae) from Northern Shikoku, Japan
 Two new anophthalmic species of Trechiama are described from northern Shikoku, under the names of T. instabilis and T. fujiwaraorum. Both belong to the group of T. oni, and are related more or less to T. satoui S. UENO. The former is an endogean species probably endemic to Mt. Zozu-san, while the latter is distributed to several mine adits in the Dozan-gawa drainage. The distributional range of the genus Trechiama in the Island of Shikoku is made known to extend considerably towards the west with the discoveries of these new species.
Yasuaki WATANABE
A New Species of Quedius (Coleoptera, Staphylinidae) from a Tuff Cave in Central Japan
  A new staphylinid beetle belonging to the subgenus Microsaurus of the genus Quedius is described and illustrated under the name of Q. (M.) uchikawai. It was found in a tuff cave near Lake Suwa-ko in Nagano Prefecture, Central Japan.
Yoshiaki NISHIKAWA
A New Leptonetid Spider from a Tuff Mine in Fukui City, Central Japan
 A new leptonetid spider is described from an abandoned adit of a tuff mine lying at the foot of the Asuwa-yama Hill in Fukui City, Central Japan. This species is remarkable in having a long arcuate process surmounted with a spinule at the dorso-proximal part of palpal tibia in male.
Takeo YAGINUMA
Two Nesticid Spiders from Shikoku, Japan

1) A new spider, Nesticus sonei, belonging to the western Japanese type is described from a breccia cave in Tokushima Prefecture, Japan. The discovery of this species is important for defining the distributional area of the eastern Japanese type in Shikoku. With this addition, 53 forms of nesticid spiders are now recognized in Japan.

2) A new locality of Nesticus zenjoensis YAGINUMA, 1978 is recorded; it is within the territory of the Kochi B type, Nesticus zenjoensis group, of the western Japanese type in Shikoku.
Takeo YAGINUMA and Hiroshi SAITO
A New Cave Spider of the Genus Porrhomma (Araneae, Linyphiidae) Found in a Limestone Cave of Shikoku, Southwest Japan
 A new spider, Porrhomma rakanum, is described from Rakan-ana Cave in Ehime Prefecture, Southwest Japan. As seen in European species. the anterior median eyes are wanting and the posterior median eyes are degenerated in this Porrhomma. Judging from the body coloration, the tendency of eye reduction and the habitat, it seems to be a cavernicolous species like P. ohkawai previous]y reported.
Masaharu KAWAKATSU and Robert W. MITCHELL
An Additional Note on Dugesia guatemalensis MITCHELL et KAWAKATSU (Turbellaria, Tricladida. Paludicola), a Troglophilic Planarian from Mexico
 An additional description of the Mexican troglophilic planarian, Dugesia guatemalensis MITCHELL et KAWAKATSU, 1973, from the Ojo de Agua de Olla de Nubes, Tamaulipas, is given in the present paper. The differential diagnosis of the species is corrected.
Naruhiko KASHIMA and Shou-Wen ZHOU
On Some Speleo-minerals from the Three Karst Regions in Southern China
 Some caves in the three southern karst regions of China, Iying in Yunnan Sheng, Guangri Zhuangzu Zizhign and Guangdong Sheng, were investigated to examine secondary speleo-minerals. Mineral identification was made mainly by X-ray powder diffraction method and revealed nine minerals of three classes as follows : carbonates (calcite, aragonite and dolomite), phosphates (brushite, crandallite, hydroxyapatite and strengite) and oxides (bimessite and goethite). Crandallite and strengite are reported as new findings from the limestone cave environment in Asia.
Shigeru OHDE
Equilibrium PC02 of Limestone Cave Waters
 Limestone caves are abundant in the Japanese Islands, especially in Okinawa. We have surveyed a number of caves distributed in such famous karstic areas as Akka, Okutama, Hirao-dai, and Okinawa, and performed chemical analysis of their waters. For examining the dissolution of CaCO3 or the cave formation, the equilibrium PCO2 was calculated from the data of water analysis. Their values were from 10-2.00 to l0-3.16 atm in the Uchimagi cave system (Iwate), from lO-2.60 to l0-2.77 in Aoiwa-do (Yamanashi), from 10-2.37 to 10-3.20 at Hirao-dai (Fukuoka), and from l0-1.66 to 10-2.78 in the Maekawa cave system (Okinawa), respectively. A comparative study of our results revealed that the PCO2 values of the cave waters from Okinawa were much higher than those of the air. This seems to have been introduced by condensation in water passages through the soil zone.
Tatsuhiko HIRAMOTO, Tomoyuki SATO, Hiroki KIMURA and Kan-Ichi NAKAGAWA
Origin and Development of the Mizunashi Cave System, Fukuoka Prefecture, Japan
 The Mizunashi limestone caves lie in Maebaru-machi of Itoshima-gun in Fukuoka Prefecture, northern Kyushu, Japan (Fig. 1). In the Mizunashi area, there are three limestone caves, Mizunashi-daiichi-do (cave No. 1), Mizunashi-daini-do (cave No. 2) and Mizunashi-daisan-do (cave No. 3), though the caves Nos. 1 and 2 are mutually connected at the inner part. These caves are developed in the limestone belonging to the Chichibu Palaeozoic system. The total length of explored passages within the Nos. 1-2 system is 1,630 m, extending over a vertical range of 62 m, though such cave formations as stalactites and stalagmits are hard]y developed. The Mizunashi Caves Nos. 1-2 are a water table system with three major levels, i.e. 630 m to 650 m (A), 605 m to 630 m (B), and 585 m to 605 m (C). The history of development of this cave is considered to have been controlled by the boundary between the limestone and the underlying green schist. A hypothetic model of the cave development is shown in Fig. 5.