New species and records of Colurella (Rotifera: Lepadellidae) from South China, with a key to Chinese Colurella Author Wei, Nan Author Jersabek, Christian D. Author Xu, Runlin Author Yang, Yufeng text Zootaxa 2019 2019-04-18 4586 3 475 490 journal article 27003 10.11646/zootaxa.4586.3.5 78fa0540-bfb3-4c88-a84d-eb9c203779cc 1175-5326 2647236 E7AA11D0-E7E9-4673-820C-8DBA7AC55A5C Colurella sanoamuangae Chittapun, Pholpunthin & Segers, 1999 ( Fig. 10 ) This species was to date only recorded from the Oriental region, in Thale Noi Lake on Malay Peninsula of Thailand ( Segers & Pholpunthin, 1997 ), in coastal peat swamps in the Phuket Province of Thailand ( Chittapun et al ., 1999 ; 2007 ; Segers & Chittapun 2001 ) and from Northeast India ( Sharma & Sharma, 2005 ; 2014 ). We found it at three sites on Qi’ao Island ( Tab. 1 ) in low number and at two sites in the Nandujiang River Estuary, Haikou, Hainan Province (sampled biannually, Tab. 1 ). FIGURE 10 . Colurella sanoamuangae Chittapun, Pholpunthin & Segers, 1999 . A , C . Right lateral view. B . Ventral view. Scale bars: A–B: 50 µm. TABLE 1. The distribution and ecological characteristic of studied Colurella species in China Sa: salinity; WT: water temperature; WD: water depth; DS: distance from shore
Species Latitude (N) Longitude (E) Region Water type Sampling habitats Occurrence date Sa (‰) WT (℃) WD (m) DS (m)
C. ovalis sp. nov. 22° 25' 42.41" 113° 37' 51.89" Zhuhai: Qi'ao Island Mangrove swamp Littoral, open water see Fig. 4 0.3~18.0 12.0~32.5 0.05~0.3 1
C. ovalis sp. nov. 22° 25' 40.31" 113° 37' 51.78" Zhuhai: Qi'ao Island Artificial pond Littoral, with submerged Myriophyllum verticillatum 24 Nov. 07; 27 Jun. 0 9 11.0; 2.0 23.1; 30.0 0.8 2
C. ovalis sp. nov. 22° 25' 36.79" 113° 37' 41.99" Zhuhai: Qi'ao Island Tidal creek Littoral, open water 27 Oct. 07; 31 Oct. 09; 2 Jun. 10 7.0; 7.0; 2.0 28.1; 33.5; 31.2 0.5~2 2
C. ovalis sp. nov. 22° 08' 27.50" 113° 33' 05.83" Macao: Coloane Estuarine water channel Pelagial, open water 9 Dec. 10 15.0 9.1 1 10
Colurella . sp. 22° 25' 40.31" 113° 37' 51.78" Zhuhai: Qi'ao Island Artificial pond Littoral, with submerged M. verticillatum 27 Aug. 0 8 5.0 33.0 1.2 2
C. cf. psammophila 22° 25' 42.41" 113° 37' 51.89" Zhuhai: Qi'ao Island Mangrove swamp Littoral, open water 31 Dec. 0 7 11.0 22.5 0.2 1
C. psammophila 22° 25' 42.41" 113° 37' 51.89" Zhuhai: Qi'ao Island Mangrove swamp Littoral, open water 30 Aug. 07; 27 Oct. 07; 18 Jan. 08; 31 Aug. 08; 25 Jul. 0 9 4.0~18.0 12.0~32.5 0.05~0.3 1
C. psammophila 22° 25' 40.31" 113° 37' 51.78" Zhuhai: Qi'ao Island Artificial pond Littoral, with submerged M. verticillatum 31 Aug. 0 8 0.8 32.5 1.2 2
C. psammophila 20° 02' 24.72" 110° 23' 08.20" Haikou: pond near Nandujiang River Weedy pond Littoral, open water, shore weedy 7 Apr. 17; 26 Sept. 17 7.40; 6.37 31.2; 33.7 0.5 0.5
C. psammophila 19° 59' 25.00" 110° 23' 34.00" Haikou: Nandujiang River Riverside swamp Littoral, with Phragmites australis 8 Apr. 17; 27 Sept. 17 8.21; 0.83 30.1; 31.6 0.2 1
C. psammophila ? (Figs. 7G, 8U) 22° 25' 40.31" 113° 37' 51.78" Zhuhai: Qi'ao Island Artificial pond Littoral, with submerged M. verticillatum 26 May. 0 7 6.0 29.0 1.2 2
C. sanoamuangae 22° 25' 42.41" 113° 37' 51.89" Zhuhai: Qi'ao Island Mangrove swamp Littoral, open water 26 Apr. 10 2.0 23.6 0.2 1
C. sanoamuangae 22° 25' 36.79" 113° 37' 41.99" Zhuhai: Qi'ao Island Tidal creek Littoral, open water 26 Apr. 0 9 5.0 25.5 0.8 2
C. sanoamuangae 22° 25' 14.08" 113° 38' 00.93" Zhuhai: Qi'ao Island Tilapia aquaculture pond Littoral, open water, shore weedy 20 Feb. 17 8.26 20.6 0.5 1
C. sanoamuangae 20° 02' 24.72" 110° 23' 08.20" Haikou: pond near Nandujiang River Weedy pond Littoral, open water, shore weedy 7 Apr. 17; 26 Sept. 17 7.40; 6.37 31.2; 33.7 0.5 0.5
C. sanoamuangae 19° 59' 25.00" 110° 23' 34.00" Haikou: Nandujiang River Riverside swamp Littoral, with P. australis 8 Apr. 17; 27 Sept. 17 8.21; 0.83 30.1; 31.6 0.2 1
Colurella sanoamuangae is characterized by the posterior end of the lorica forming a triangular projection (lateral view), that overlays the foot aperture as a tongue-shaped structure (ventral/dorsal view) ( Chittapun et al ., 1999 ). This seems to be a stable morphological feature, as far as can be judged from previous observations. Accordingly, a previous record under this name from Iran , with posteriorly rounded lorica ( Reihan Reshteh & Rahimian, 2014 ), probably represents another as yet undescribed species ( Jersabek & Leitner, 2013 ). According to our present knowledge, C. sanoamuangae is an endemic species widely distributed in the Oriental region. Measurements. Body (N = 5 females ): lorica length 97.8–101.4 µm , lorica width 46.7–48.5 µm , lorica height 59.4–67.2 µm , anterior aperture width 45.8–48.2 µm , second foot pseudosegment 6.7–8.1 µm , third foot pseudosegment 7.9–10.1 µm , toe length 46.6–47.5 µm .