On the taxonomic status and biogeography of the Isolapotamidae Bott, 1970 (Decapoda, Brachyura) Author Brandis, Dirk text Journal of Natural History 2002 2002-07-31 36 11 1291 1339 http://www.tandfonline.com/doi/abs/10.1080/00222930110051743 journal article 10.1080/00222930110051743 1464-5262 5298522 Nanhaipotamo n formosanum (Parisi, 1916) (gure 6a–c) Geothelphusa formosanum Parisi, 1916: 156 , pl. 8, gure 1, text gure 2a; Balss, 1937: 168, gure 32. Isolapotamon (Nanhaipotamon) formosanum formosanum : Bott, 1968: 124 , gure 9. Nanhaipotamo n formosana formosana : Bott, 1970b: 195, gure 8. Material . One, one ( SMF 4507 ), Taiwan , Nantou , Chung-hsing Village , ded. J. K. Chia , ex coll. Tulane University collection; one ( ZMB 12528), Taiwan , Kagi . Diagnosis. Terminal joint of rst gonopod dorsoventrally attened, broadly triangular in shape, formed by projection of mesial overlapping zone. Margins of mesial projection straight. Type locality . Taiwan . Distribution. Presently known only from Taiwan . Measurements. 34.2: 27: 18.8: 9.4 ( ZMB 12528). Remarks. The species of Nanhaipotamon can be easily characterized by diOEerences in the shape of the rst male gonopod. The mesial projection of gonopod 1 has a typical triangular shape with straight margins, and Dai (1995) showed a large number of similar species with such triangular projections. However, according to the detailed drawings of Dai (1995) , the species can be separated easily from each other by the shape of the margins of gonopod 1.