Amemboa riparia J. Polhemus & Andersen, 1984

Leng, Zhaoqi, Zhang, Beichen, Jin, Zezhong & Ye, Zhen, 2024, Taxonomic review of Amemboa Esaki, 1925 from China, with description of a new species (Hemiptera, Heteroptera, Gerridae), ZooKeys 1210, pp. 1-28 : 1-28

publication ID	https://doi.org/ 10.3897/zookeys.1210.125611
publication LSID	lsid:zoobank.org:pub:6ED50927-CFF7-4795-8C05-DF78D85C848F
DOI	https://doi.org/10.5281/zenodo.13327500
persistent identifier	https://treatment.plazi.org/id/82A2508E-3766-56BF-90FC-B1C46CD61C23
treatment provided by	ZooKeys by Pensoft
scientific name	Amemboa riparia J. Polhemus & Andersen, 1984
status

Treatment

Amemboa riparia J. Polhemus & Andersen, 1984 View in CoL

Figs 2 H, I View Figure 2 , 3 G, H View Figure 3 , 6 H, I View Figure 6 , 7 G, H View Figure 7 , 8 G, H View Figure 8 , 9 G, H View Figure 9 , 10 G, H View Figure 10 , 11 G, H View Figure 11 , 12 H, I View Figure 12 , 15 C, D View Figure 15 , 17 View Figure 17 , 18 View Figure 18

Material examined.

1 ♂, 1 ♀ (apterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City, Pu-wen Town ; 22 ° 30 ' 36.5 " N, 101 ° 3 ' 55.5 " E; 880 m a. s. l.; 25 Apr. 2011; Zhen Ye leg. ( NKUM) GoogleMaps • 7 ♂♂, 6 ♀♀ (apterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City, Man-dian Village, Na-ban-he Nature Reserve ; 22 ° 7 ' 48.5 " N, 100 ° 39 ' 46.1 " E; 629 m a. s. l.; 28 Jul. 2016; Zhen Ye leg. ( NKUM) GoogleMaps • 1 ♂ (apterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City, Meng-la County, Meng-lun Town, Ba-ka-xiao-zhai Village ; 21 ° 57 ' 57.0 " N, 101 ° 12 ' 16.2 " E; 747 m a. s. l.; 5 Jul. 2018; Juan-juan Yuan and Yan-fei Li leg. ( NKUM) GoogleMaps • 1 ♂ (apterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City, Meng-la County, Mo-han Town ; 21 ° 11 ' 51.0 " N, 101 ° 41 ' 55.8 " E; 17 Aug. 2014; Zhen Ye leg. ( NKUM) GoogleMaps • 3 ♀♀ (apterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City, Meng-la County, Yao-qu-yao-zu Township ; 21 ° 42 ' 57.0 " N, 101 ° 32 ' 32.2 " E; 758 m a. s. l.; 26 Jul. 2016; Zhen Ye leg. ( NKUM) GoogleMaps • 4 ♂♂, 3 ♀♀ (apterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City, Man-dian Village, Man-dian-pu-bu ; 22 ° 7 ' 45.1 " N, 100 ° 40 ' 01.9 " E; 660 m a. s. l.; 20 Apr. 2023; Ze-zhong Jin and Zi-he Li leg. ( NKUM) GoogleMaps • 3 ♂♂, 2 ♀♀ (apterous), China, Yunnan Province, Pu-er City, Meng-lian County, Meng-ma Town, Mang-yun Village ; 22 ° 13 ' 50.5 " N, 99 ° 21 ' 30.1 " E; 887 m a. s. l.; 20 Jul. 2016; Zhen Ye leg. ( NKUM) GoogleMaps • 2 ♂♂, 1 ♀ (apterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City, Pu-wen Town, Cai-yang-he ; 22 ° 2 ' 43.2 " N, 100 ° 56 ' 10.3 " E; 25 Apr. 2011; Rui Wang leg. ( NKUM) GoogleMaps • 1 ♂ (apterous), China, Yunnan Province, Pu-er City, Si-mao District, Nan-dao-he ; 22 ° 36 ' 45.9 " N, 100 ° 59 ' 46.6 " E; 990 m a. s. l.; 15 Jul. 2018; Juan-juan Yuan leg. ( NKUM) GoogleMaps • 1 ♂ (apterous), 1 ♀ (macropterous), China, Yunnan Province, Xi-shuang-ban-na Autonomous Prefecture, Jing-hong City , Nan-la County; 21 ° 44 ' 25.6 " N, 101 ° 18 ' 8.0 " E; 28 Apr. 2011; Rui Wang leg. ( NKUM) GoogleMaps .

Diagnosis.

Color pattern as shown in Figs 2 H, I View Figure 2 , 3 G, H View Figure 3 , 12 H, I View Figure 12 . Males: profemur incrassate (Fig. 6 H, I View Figure 6 ); ventral side of the profemur with two indistinct tufts of short setae on the apical 1 / 2 and an additional large, elongate crest of dark setae on basal 1 / 2 (Fig. 6 I View Figure 6 ), occasionally also with a tuft of short setae in the middle (Fig. 6 H View Figure 6 ); protibia slightly curved and with a distinct tumescence on basal 1 / 2 (Fig. 6 H, I View Figure 6 ); abdominal segment VIII relatively long (Fig. 7 G, H View Figure 7 ); in ventral view, pygophore posteriorly with a short knob-like median process, a pair of distinct angular lateral processes, and a pair of indistinct blunt processes between the median process and lateral processes (Figs 8 G, H View Figure 8 , 9 G; H View Figure 9 ); median process of pygophore relatively broad in lateral view (Figs 10 G, H View Figure 10 , 11 G, H View Figure 11 ); lateral arm of proctiger with an angular process laterally and basally curved in ventral view (Fig. 8 G, H View Figure 8 ), and in lateral view with a distinctly pointed subapical process (Fig. 10 G, H View Figure 10 ).

Comparative notes.

A. riparia is most similar to A. lyra (Paiva, 1918) , see comparative notes in Polhemus and Tran (2012).

Distribution.

China: Yunnan (Fig. 18 View Figure 18 ). Thailand; Laos; Vietnam; Peninsular Malaysia; Singapore ( Polhemus and Tran 2012).

Habitats.

We observed A. riparia inhabiting the edges of streams with extremely slow water currents (Fig. 15 D View Figure 15 ), as well as on completely still ponds (Figs 15 C View Figure 15 , 17 A – C View Figure 17 ).

Remarks.

Based on the reasons listed in the introduction, we believe that the “ A. lyra (Paiva, 1918) ” reported by Cheng et al. (2006) is actually A. riparia . Therefore, we conclude that A. lyra has not been recorded in China.

The differences between A. riparia and A. lyra have been extensively discussed by Polhemus and Tran (2012). Moreover, Polhemus and Tran (2012) discovered specimens of A. riparia with a small tuft of setae in the middle of the profemora. These specimens were collected from northern Thailand and northern Vietnam, exhibiting genitalic segments correspond to A. riparia ( Polhemus and Tran 2012) . Additionally, the middle setae tufts of profemur also slightly differed from those of A. lyra ( Polhemus and Tran 2012) .

We found several specimens with similar morphology characteristics in southern Yunnan (Figs 2 H View Figure 2 , 3 G View Figure 3 , 6 G View Figure 6 , 7 G View Figure 7 , 8 G View Figure 8 , 9 G View Figure 9 , 10 G View Figure 10 , 11 G View Figure 11 , 12 H View Figure 12 ), including a couple from Jinghong City and a male from Pu’er City. These specimens also have a small tuft of setae in the middle of the male profemora. The lateral process of the pygophore (Figs 8 G View Figure 8 , 9 G View Figure 9 ) and the processes on the lateral arms of the proctiger (Fig. 10 g View Figure 10 ) both aligned more closely with those of A. riparia (see Polhemus and Andersen 1984: figs 77, 78; also see Polhemus and Tran 2012: fig. 4) rather than A. lyra (see Polhemus and Andersen 1984: figs 74, 75; also see Polhemus and Tran 2012: fig. 2). Given that we only found a few individuals and not a large population, we are more inclined to believe that these specimens belong to A. riparia , with the male profemur differences resulting from occasional mutations.