Mongoloniscus koreanus ( Verhoeff, 1930 )

Jiang, Chao, Zhong, Jing, Wang, Zhidong, Li, Weichun & Huang, Luqi, 2024, Taxonomic study on the genus Mongoloniscus Verhoeff, 1930 (Isopoda, Agnaridae) from China: morphological and phylogenetic analyses, ZooKeys 1202, pp. 229-253 : 229-253

Mongoloniscus koreanus ( Verhoeff, 1930)

Protracheoniscus (Mongoloniscus) koreanus Verhoeff, 1930: 117, figs 14, 15.

Mongoloniscus koreanus : Kwon 1993: 149, figs 12, 13; Kwon 1995: 528.

Mongoloniscus nigrogranulatus Kwon & Taiti, 1993: 48, figs 201–208.

Nagurus tsushimaensis Nunomura, 1987: 30 , fig. 113.

Nagurus pallidus : Nunomura 1991: 8, fig. 171.

Examined material.

China: 2 spms ( 20200813002 , 20200813006 ), Anhui Province, Hefei, Binghu National Forestry Park (31.7230 ° N, 117.3728 ° E), 20 m asl., 13. viii. 2020, coll. Chao Jiang ; 2 spms ( 20230324029 – 20230324030 ), Qimen county: Qishan Town, Qichang Road (29.8666 ° N, 117.6841 ° E), 150 m asl., 24. iii. 2023, coll. Chao Jiang ; 28 spms ( 20230327116 – 20230327129 ), Ningguo County, Yunti She Village, Qianqiushezu (29.8666 ° N, 117.6841 ° E), 150 m asl., 27. iii. 2023, coll. Chao Jiang ; 26 spms ( 20230326076 – 20230326088 , 20230327102 – 20230327103 ), Xijin Streets, Cuizhu Park (30.6319 ° N, 118.9710 ° E), 60 m asl., 27–28. iii. 2023, coll. Chao Jiang ; 9 spms ( 20230324017 – 20230324021 ), Xiuning County, Qiyunshan Service Area (29.7540 ° N, 118.1321 ° E), 200 m asl., 24. iii. 2023, coll. Chao Jiang ; 1 spm ( 20230325071 ), Huangshan, Tankou Town , Hougu (30.0740 ° N, 118.1527 ° E), 510 m asl., 25. iii. 2023, coll. Chao Jiang ; 12 spms ( 20230215006 – 20230215008 ), Bozhou: Bozhou Cultural Park (33.8286 ° N, 115.7616 ° E), 15. ii. 2023, coll. Chao Jiang ; 2 spms ( 20230214004 , 20230214005 ), Fuyang, Yingquan district, Wuming Service Area , (33.0458 ° N, 115.8935 ° E), 14. ii. 2023, coll. Chao Jiang . 2 spms ( 20201018028 , 20201018037 ), Chongqing, Jiangbei District, Tieshanping Forestry Park (29.5957 ° N, 106.6645 ° E), 450 m asl., 18. x. 2020, coll. Chao Jiang & Zhidong Wang . 13 spms ( 20201118001 , - 12, - 18, - 20, - 22, - 25, - 30, - 37, - 38, - 40, - 41, - 43), Guangxi Zhuang Autonomous Region, Guilin, Guangxi Guilin National Forestry Park (25.2207 ° N, 110.2543 ° E), 18. xi. 2020, coll. Zhidong Wang . Guizhou Province, 20 spms, ( 20201020001 , - 4, - 7, - 9, - 10, - 14, - 16, - 17, - 20, - 21, - 24, - 25, - 27, - 29, - 30, - 31, - 35, - 36, - 39, - 40), Zhengning County, Yelangdong Scenic Area (26.0918 ° N, 105.6248 ° E), 1070 m asl., 20. x. 2020, coll. Chao Jiang & Zhidong Wang ; 8 spms ( 20210601038 – 20210601045 ), Guiyang: Jinhua town, Shangcheng West Road (26.6067 ° N, 106.57463 ° E), 1260 m asl., 1. vi. 2021, coll. Chao Jiang ; 16 spms ( 20210728020 – 20210728035 ), Jiangkou county, Fanjingshan National Nature Reserve (27.8464 ° N, 108.7733 ° E), 1510 m asl., 28. vii. 2021, coll. Zhidong Wang . 3 spms ( 20210410069 – 20210410071 ), Hubei Province, Jingmen, Xiangshan II Road , Youyuan (31.0441 ° N, 112.1999 ° E), 80 m asl., 10. iv. 2021, coll. Zhidong Wang & Tianyun Chen ; 5 spms ( 20210414063 , - 64, 20210414066 – 20210414068 ), Shennongjia : shennongding (31.4902 ° N, 110.3583 ° E), 1840 m asl., 14. iv. 2021, coll. Zhidong Wang & Tianyun Chen ; 9 spms ( 20210415051 – 20210415059 ), Shiyan, Niutoushan National Forestry Park (32.6118 ° N, 110.7298 ° E), 390 m asl., 15. iv. 2021, coll. Zhidong Wang & Tianyun Chen ; 9 spms ( 20210415061 – 20210415069 ), Yuanyuan Park (32.6113 ° N, 110.7695 ° E), 270 m asl., 15. iv. 2021, coll. Zhidong Wang & Tianyun Chen ; 2 spms ( 20190321002 , 20190321007 ), Hunan Province, Yongzhou, Puliqiao Town (26.6849 ° N, 111.5997 ° E), 160 m asl., 21. iii. 2019, coll. Chao Jiang ; 37 spms ( 20201107001 , - 2, - 6, - 7, - 10, - 14, - 16, - 18, - 22, - 24 – - 30, - 32, - 33, - 35 – - 38, - 40, - 42, - 44, - 45, - 47, - 48, - 50, - 52 – - 54, - 57, - 60, - 63, - 64, - 67), Jiangsu Province, Yancheng: Jiangsu Yancheng Wetland National Nature Reserve ( Rare Birds ) (33.6035 ° N, 120.5042 ° E), 5 m asl., 7. xi. 2020, coll. Zhidong Wang ; 9 spms ( 20201109001 , - 6, - 9, - 18, - 27, - 30, - 31, - 39, - 42), Nanjing, Jiangjunshan Scenic Area (32.1007 ° N, 118.5861 ° E), 130 m asl., 9. xi. 2020, coll. Zhidong Wang ; 2 spms ( 20210801001 , - 2), Jiangxi Province, Nanchang, Zhaoxian Town , Meiling , (28.7243 ° N, 115.6848 ° E), 350 m asl., 1. viii. 2021, coll. Zhidong Wang ; 32 spms ( 20230217013 –18, - 26, - 27), Dexing, Yincheng Street , Jishuihu Wetland Park (28.9354 ° N, 117.5952 ° E), 70 m asl., 17. ii. 2022, coll. Chao Jiang ; 23 spms ( 20230219018 – 20230219020 ), Dexing Railway Station (28.9587 ° N, 117.8544 ° E), 19. ii. 2023, coll. Chao Jiang ; 1 spm ( 20210330053 ), Shaanxi Province, Xi’an, Xi’anbei Railway Station , (34.3741 ° N, 108.9345 ° E), 350 m asl., 3. iii. 2021, coll. Zhidong Wang ; 26 spms ( 20220909001 – 20220909026 ), Sichuan Province, Yanting County, Yanting Service Area (31.1481 ° N, 105.3804 ° E), 360 m asl., 9. ix. 2022, coll. Chao Jiang ; 29 spms ( 20220911007 ), Tongjiang County: Nuoshuihe Town (32.4320 ° N, 107.1858 ° E), 780 m asl., 11. ix. 2022, coll. Chao Jiang ; 28 spms ( 20220914002 – 20220914022 ), Bazhong, Bazhou District , Jiangbei Road , (31.8718 ° N, 106.7379 ° E), 380 m asl., 14. ix. 2022, coll. Chao Jiang ; 16 spms ( 20220829070 , - 71, - 73 – - 84), Meishan, Taihe Town, Meishan Service Area , (31.8718 ° N, 106.7379 ° E), 380 m asl., 29. viii. 2022, coll. Chao Jiang ; 17 spms ( 20220829045 , - 47 – - 60), Jiajiang County, Jiajiang Bridge (29.7216 ° N, 103.5754 ° E), 380 m asl., 29. viii. 2022, coll. Chao Jiang ; 4 spms ( 20210528013 – 20210528015 , - 18), Yunnan Province, Linchang, Manpan Street , (23.9061 ° N, 100.0985 ° E), 1430 m asl., 28. v. 2021, coll. Chao Jiang ; 2 spms ( 20210531016 , - 17), Mianning Street (23.8787 ° N, 100.0983 ° E), 1430 m asl., 31. v. 2021, coll. Chao Jiang ; 6 spms ( 20210506004 – 20210506009 ), Zhejiang Province, Jinhua, Anwen Street , (29.0169 ° N, 120.4570 ° E), 390 m asl., 6. v. 2021, coll. Chao Jiang ; 27 spms ( 20230324076 – 20230324086 ), Hangzhou, Lin’an Service Area , (30.2076 ° N, 119.5308 ° E), 160 m asl., 24. iii. 2023, coll. Chao Jiang ; 2 spms ( 20230327058 ), Tianmushan National Nature Reserve (30.3190 ° N, 119.4448 ° E), 350 m asl., 27. iii. 2023, coll. Chao Jiang ; 11 spms ( 20230328039 – 20230328044 ), Huzhou, Huzhou Railway Station (30.8628 ° N, 120.0238 ° E), 160 m asl., 28. iii. 2023, coll. Chao Jiang ; 8 spms ( 20230324004 – 20230324009 ), Wuxing District, Zhihe Road (120.0211 E, 30.8706 N), 20 m asl., 24. iii. 2023, coll. Chao Jiang ; 12 spms ( 20230328057 – 20230328059 ), Wuxing District, Renhuangshan Mountain , (30.8973 ° N, 120.0572 ° E), 80 m asl., 28. iii. 2023, coll. Chao Jiang ; 4 spms ( 20230328008 – 20230328011 ), Anji County, Fenghuanshan Park (30.6198 ° N, 119.7013 ° E), 160 m asl., 28. iii. 2023, coll. Chao Jiang .

Remarks.

This species closely resembles M. maculatus (Iwamoto, 1943) by the noduli laterals at almost the same distance from the lateral margins, and the morphology of pleopod 1 exopod. However, it can be distinguished in having the eyes with 20–24 ommatidia, male pereopod 6 fringed with long setae and bearing a distal protrusion on the sternal margin at the basis, and the ischium of pereopod 7 fringed with setae as well. In M. maculatus , its eyes have 15 or 16 ommatidia, the basis of pereopod 6 and the ischium of male pereopod 7 with sparse setae. For detailed descriptions and illustrations of M. koreanus see Kwon (1993).

Distribution.

China (Anhui, Chongqing, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Sichuan, Yunnan, Zhejiang), Japan, and Korea.