Exalloniscus duospinatus Li & Jiang, 2024
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publication ID |
https://dx.doi.org/10.3897/zse.100.115813 |
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publication LSID |
lsid:zoobank.org:pub:1B0AF998-E43A-4F82-9F97-F6F8C99133B4 |
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persistent identifier |
https://treatment.plazi.org/id/3F019AA6-3E86-4AD0-828F-20E115548925 |
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taxon LSID |
lsid:zoobank.org:act:3F019AA6-3E86-4AD0-828F-20E115548925 |
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treatment provided by |
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scientific name |
Exalloniscus duospinatus Li & Jiang |
| status |
sp. nov. |
Exalloniscus duospinatus Li & Jiang sp. nov.
Figs 1A View Figure 1 , 2 View Figure 2
Type material.
Holotype. China: male, Sichuan Province, Qionglai, Datong Town (30°30'N, 103°18'E), alt. 770 m, 16 April 2021, Chao Jiang leg., habitus no. QL2301, prep. slide no. L23098 (JXAUM).
Paratypes. China, Sichuan Province: One female, same data as holotype, no. 20210416044; two males, one female, Dayi County, near Xiling Snow Mountain Tunnel (30°37'N, 103°19'E), alt. 860 m, 16 April 2021, Chao Jiang leg., no. 20210416031-202104160033; one female, Dayi County, Heishuihe Nature Reserve, Dafeishui (30°38'N, 103°10'E), alt. 1290 m, 16 April 2021, Chao Jiang leg., no. 20210416026; one male, Chengdu, Jincheng Park (30°34'N, 104°02'E), alt. 450 m, 19 April 2021, Chao Jiang leg., no. 20210419001 (CMMI).
Diagnosis.
Male pleopod 1 endopod has two spinelike lobes at apical part of outer margin.
Description.
Maximum length: male 3.6 mm and female 4.2 mm.
Body oval, flattened and pale brown. Cephalon with lateral lobes slightly protruding laterally, apex rounded. Eyes with three ommatidia. Pereonites 1-2 with postero-lateral corners nearly right-angled, pereonites 3-7 with postero-lateral corners directed backwards. Pleonites 3-5 with epimera falciform, protruding backwards. Telson triangular, twice as wide as long, lateral margin slightly concave, ending with rounded apex. Uropod exopod as long as endopod (Fig. 1A View Figure 1 ).
Antenna with fifth article of peduncle slightly longer than flagellum; ratio of flagellum approximately 3:2:2 (Fig. 2A View Figure 2 ).
Pereopod 1 with long strong setae on sternal margin of merus and carpus, carpus with transversal antennal grooming brush (Fig. 2B View Figure 2 ). Pereopod 7 with several strong setae on sternal margin; basis with distinct water conducting system; ischium gently concave on rostral surface of base, and straight on sternal margin (Fig. 2C View Figure 2 ).
Male pleopod 1 exopod almost quadrangular, outer margin convex; endopod with apical part bearing two spinelike lobes on outer margin and four tiny spines on inner margin (Fig. 2D View Figure 2 ). Pleopod 2 exopod triangular with several setae on outer margin; endopod flagelliform, longer than exopod (Fig. 2E View Figure 2 ). Pleopods 3-5 exopods triangular with several setae on outer margin (Fig. 2F-H View Figure 2 ).
Etymology.
Latin: prefix duo - = double plus spinatus = spinous. The new species name refers to the male pleopod 1 endopod with two spinelike lobes at the apical part of outer margin.
Remarks.
This new species is similar to E. silvestrii Kwon & Taiti, 1993, but it can be distinguished by pereopod 7 ischium slightly concave at the base of the rostral surface, and pleopod 1 endopod bearing two spinelike lobes at the apical part of the outer margin (Fig. 2C, D View Figure 2 ). In E. silvestrii , the base of pereopod 7 ischium with a large flat rounded lobe on the rostral surface, and the apical part of pleopod 1 endopod with three triangular lobes on the outer margin ( Kwon and Taiti 1993: figs 110, 112).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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