Burmoniscus mauritiensis (Taiti & Ferrara, 1983)

Zeng, Xue-Gang, Wang, Jin, Yang, Jing-Bo & Li, Wei-Chun, 2021, Integrative taxonomy reveals a new species of the genus Burmoniscus (Isopoda, Philosciidae) from the Xuefeng Mountains, China, ZooKeys 1055, pp. 123-134 : 123

Burmoniscus mauritiensis (Taiti & Ferrara, 1983)

Figure 4A-E

Rennelloscia mauritiensis Taiti & Ferrara, 1983: 203, fig. 2.

Burmoniscus mauritiensis (Taiti & Ferrara, 1983): Taiti and Ferrara 1986: 187; Kwon and Taiti 1993: 17.

Examined specimens.

Three males, seven females, China, Hunan Province, Xuefeng Mountains, Lingcuishan Park (27°54'N, 110°34'E), 15 July 2019, alt. 214 m, Wei-Chun Li and Jing-Bo Yang leg., slide prep. no. L2016-2018, DNA no. LCS2028-2029; 13 males, 85 females, China, Jiangxi Province, Nanchang County, Liantang (28°33'N, 115°56'E), 3 January 2012, Wei-Chun Li leg., slide prep. no. L17225-17230.

Distribution.

China (Guangxi, Hong Kong, Hunan, Jiangxi, Nanjing, Sichuan); Hawaiian Islands; Korea; Mauritius.

Remarks.

In the examined specimens of this species, the body length of males were 4.0-7.0 mm, and of females 4.5-7.0 mm. Taiti and Ferrara (1983) have adequately described and illustrated this species. By morphology, it is easily distinguished by the unique characters of the male pleopod 1 endopodite, which is distinctively bent outwards near the apical area and densely covered with denticles (see Taiti and Ferrara 1983: fig. 2). Furthermore, the morphological characters of this species are identical to those of B. dasystylus Nunomura, 2003 (see also Nunomura 2003a: fig. 5).

Karasawa (2016) provided a COI sequence (accession no. AB626154) of B. dasystylus . In this context, we estimated the COI sequence divergences of B. mauritiensis and B. dasystylus based on our data (accession no. LC617873, LC617874) and the published sequence (accession no. AB626154). The result shows that their minimum interspecific distance is much smaller than the maximum intraspecific distance of B. mauritiensis (Table 2 ). In the phylogenetic analysis, they were also represented by a well-supported clade (Fig. 1 ). Thus, according to the original descriptions and molecular analyses, B. dasystylus is most probably a junior synonym of B. mauritiensis and that a re-examination of the type material is necessary to confirm the synonymy.

Figures

Figure 1. Maximum likelihood (ML) tree of the COI dataset with best ModelFinder model applied. Values below the nodes represent bootstrap support (BS) values from 1000 replicates, and values above the nodes represent the posterior probability (PP) of the Bayesian analysis of the same dataset.

Figure 4. Burmoniscus mauritiensis (Taiti & Ferrara, 1983), male A habitus in dorsal view B telson in dorsal view C pleon in lateral view D pleopod 1 exopodite E pleopod 1 endopodite.