Lucasioides subcurvatus Li & Wang 2024, sp. nov.
Creators: name: Wang, Jin
name: Yao, Chong-Hui
name: Jiang, Chao
name: Li, Wei-Chun
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Agnaridae
Lucasioides
Lucasioides subcurvatus

description: 3.3. 7.Lucasioides subcurvatusLi & Wang sp. nov.
Figures 6 I, 13
Type material.
Holotype. CHINA • 1 ♂; Sichuan Province, Leshan City, Mabian Yi Autonomous County, Minjian Town, Zhang Youfang Village; 28.8439 ° N, 103.5475 ° E, el. 600 m a. s. l.; 12. viii. 2012; W. C. Li leg. (DNA no. DFD 2006, Prep. slide nos. L 2073 - L 2075). — Paratypes. • 1 ♂, 3 ♀♀; same data as the holotype (DNA nos. DFD 2003 b, DFD 2003 - DFD 2005). CHINA • 1 ♂, Guizhou Province, Bijie City, Qianxi County, Qianxi Railway Station; 26.9937 ° N, 106.0413 ° E, el. 1221 m a. s. l.; 4. viii. 2020; X. G. Zeng, J. B. Yang leg. (DNA no. GQX 2204, Prep. slide no. L 22098).
Diagnosis.
Pereonite 1 with right-angled postero-lateral corner; pleopod 1 exopod slightly concave, forming two inconspicuous lobes.
Description.
Body length of males 6.1-6.9 mm, of females 5.2-6.0 mm. Color in alcohol blackish brown, dorsum slightly granulated, and with irregular white muscle spots (Fig. 6 I). Pereonite 1 slightly sinuous on posterior margin of epimeron, postero-lateral corner nearly right-angled. Noduli laterales as in Fig. 13 A. Telson triangular, width almost as long as length, lateral margin slightly concave, posterior apex blunted; uropod exopodite about two and half times as long as basipodite (Figs 6 I, 13 A). — Cephalon with arched median lobe, median lobe nearly as long as lateral lobes (Figs 6 I and 13 A). Antennula with several aesthetascs on distal tip of third article (Fig. 13 B). Antennal flagellum with first segment about three fifths as long as second one (Fig. 13 C). — Pereopod 1 with brush of long setae on carpus and merus (Fig. 13 D). Pereopod 7 ischium with deep depression on rostral surface, carpus slightly expanded near middle on dorsal margin (Fig. 13 E). — Pleopods 1-5 exopods with Protracheoniscus - type pseudotrachea (Fig. 13 F-J). — MALE: pleopod 1 exopod slightly concave at posterior tip, forming two inconspicuous lobes, endopod with broad basal part, narrowed towards beak-shaped posterior tip (Fig. 13 F); pleopod 2 endopod styliform, a bit longer than exopod (Fig. 13 G).
Etymology.
Latin “ subcurvatus ” = subcurved. The new species name refers to the shape of pleopod 1 exopod with a subcurved apex.
Remarks.
The new species is very similar to L. formosus sp. nov. in having the pleopod 1 exopod slightly concave and forming two inconspicuous lobes. But it is easy to be distinguished in having the noduli laterales on pereonites 2-4 shifted from lateral margins than the noduli laterales on pereonites 1, 5-7 (Fig. 13 A). In L. formosus, the noduli laterales on pereonites 1-4 are much farther from lateral margin than noduli laterales of pereonites 5-7 (Fig. 11 A). Furthermore, the two species can also be separated based on morphometric evidence and molecular analyses (Figs 3, 5).
description: Published as part of Wang, Jin, Yao, Chong-Hui, Jiang, Chao & Li, Wei-Chun, 2024, Integrative taxonomy reveals exceptional species diversity of Lucasioides from China (Isopoda: Oniscidea: Agnaridae), pp. 527-549 in Arthropod Systematics & amp; Phylogeny 82 on pages 527-549, DOI: 10.3897/asp.82.e113041