Exalloniscus triangulus Li & Jiang, 2024
|
publication ID |
https://dx.doi.org/10.3897/zse.100.115813 |
|
publication LSID |
lsid:zoobank.org:pub:1B0AF998-E43A-4F82-9F97-F6F8C99133B4 |
|
persistent identifier |
https://treatment.plazi.org/id/1E234552-69F1-4128-BACA-9FC8609F649F |
|
taxon LSID |
lsid:zoobank.org:act:1E234552-69F1-4128-BACA-9FC8609F649F |
|
treatment provided by |
|
|
scientific name |
Exalloniscus triangulus Li & Jiang |
| status |
sp. nov. |
Exalloniscus triangulus Li & Jiang sp. nov.
Figs 1E View Figure 1 , 5 View Figure 5
Type material.
Holotype. China: male, Hubei Province, Jingshan County, Kongshandong Scenic Area (30°58'N, 113°02'E), alt. 100 m, 9 April 2021, Zhidong Wang and Tianyun Chen leg., habitus no. KSD2302, prep. slide no. L23097 (JXAUM).
Diagnosis.
Male pleopod 1 exopod distinctly convex on outer margin, and endopod with a triangular lobe and a seta recurved inwards at apical part.
Description.
Length 2.9 mm.
Body oval, flattened and white mixed with pale brown. Cephalon with lateral lobes slightly protruding laterally, apex rounded. Eyes with three ommatidia. Pereonites 1 with postero-lateral corner nearly right-angled, pereonites 2-7 with postero-lateral corners directed backwards. Pleonites 3-5 with epimera falciform, protruding backwards. Telson triangular, twice as wide as long, lateral margin gently concave, ending with rounded apex. Uropod exopod almost as long as endopod (Fig. 1E View Figure 1 ).
Antenna with fifth article of peduncle longer than flagellum; ratio of flagellum approximately 3:2:2 (Fig. 5A View Figure 5 ).
Pereopod 1 with long strong setae on sternal margin of merus and carpus, carpus with transversal antennal grooming brush (Fig. 5B View Figure 5 ). Pereopod 7 with several strong setae on sternal margin; basis with distinct water conducting system; ischium slightly convex on sternal margin (Fig. 5C View Figure 5 ).
Male pleopod 1 exopod basal half broad, distal half narrowed towards blunted apex, distinctly convex on outer margin; endopod ending with triangular lobe and seta recurved inwards (Fig. 5D View Figure 5 ). Pleopod 2 exopod triangular with several setae on outer margin; endopod flagelliform, longer than exopod (Fig. 5E View Figure 5 ). Pleopods 3 and 4 exopods almost oval, pleopod 5 triangular with several setae on outer margin (Fig. 5F-H View Figure 5 ).
Etymology.
Latin: Exalloniscus triangulus = triangular. The new species name refers to the male pleopod 1 endopod ending with a triangular lobe.
Remarks.
This new species is similar to E. malaccensis Taiti & Ferrara, 1988 in having a triangular lobe at the apical part of male pleopod 1 endopod. But it can be distinguished by pleopod 1 exopod distinctly convex on the outer margin, and the apical part of endopod with a triangular lobe and a seta recurved inwards (Fig. 5D View Figure 5 ). In E. malaccensis , pleopod 1 exopod is distinctly concave on the outer margin, and the apical lobe of endopod is thinner and recurved outwards ( Taiti and Ferrara 1988: fig. 23D).
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.