Gieysztoria macrovariata ( Weise, 1942 ) New

Zhang, Hang, Li, Yi-Kui, Wu, Cheng-Chen & Wang, An-Tai, 2014, Two new species of the genus Gieysztoria (Rhabdocoela: Dalyelliidae) from China, Zoological Systematics 39 (4), pp. 485-495 : 491

3.3 Gieysztoria macrovariata ( Weise, 1942) New record to China ( Figs 15–16 )

Material examined. PLA-G0090 – PLA-G0092 , wetlands of Shiyan Reservoir in Shenzhen , Guangdong Province, China (22°40 ′ 58 ″ N, 113°53 ′ 42 ″ E) ( Fig. 17 ) , 19 June 2013, coll. Yan-Hong Lu, deposited in National Zoological Museum, Institute of Zoology , Chinese Academy of Sciences ( IZCAS), Beijing, China .

Diagnosis. The species is similar to G. shantouensis Zhang, Li & Wang , sp. nov. Sclerotic stylet of G. macrovariata is 150 μ m in length. Ten sclerotic spines are attached to the distal end. Base of each spine is attached to a U-shaped muscular layer, and lateral spines are dagger-shaped. The spines shorten from both sides to the middle. The lateral one is 97 μ m and the middle one 66 μ m in length ( Figs 15–16 ).

Discussion. The stylet of type materials of G. macrovariata is about 102.5–139.5 μ m in length, with 10 sclerotic spines. The longest spine is up to 97 μ m and the shortest is 75 μ m in length ( Weise, 1942). However, the Chinese specimens have little differences with the type. The stylet of the Chinese specimens is 133 μ m–150 μ m in total length, with 10 sclerotic spines. The longest spine is up to 97 μ m and the shortest is 66 μ m in length.

Figures

Figs 15–16. Gieysztoria macrovariata Weise, 1942, stylets. Scale bars=50μm.

Fig. 17. Distribution of Gieysztoria spp.