Lucasioides schmidti Li & Wang, 2024

Wang, Jin, Yao, Chong-Hui, Jiang, Chao & Li, Wei-Chun, 2024, Integrative taxonomy reveals exceptional species diversity of Lucasioides from China (Isopoda: Oniscidea: Agnaridae), Arthropod Systematics & amp; Phylogeny 82, pp. 527-549 : 527-549

3.3. 4. Lucasioides schmidti Li & Wang sp. nov.

Figures 6 E , 10

Type material.

Holotype. CHINA • 1 ♂; Hunan Province, Huaihua City, Xupu County, Lingcui Mountain Park ; 27.9074 ° N, 110.5778 ° E, el. 214 m a. s. l.; 15. viii. 2019; W. C. Li, J. B. Yang leg. (DNA no. LCS 2020 , Prep. slide nos. L 2046 - L 2048 ) . — Paratypes. • 2 ♀♀; same data as the holotype (DNA no. LCS 2008 ) . CHINA • 1 ♂, Hunan Province, Loudi City, Xinhua County, Shizi Mountain Park ; 27.7311 ° N, 110.3338 ° E, el. 235 m a. s. l.; 16. vii. 2019; W. C. Li, J. B. Yang leg. (DNA no. SZS 1901 , Prep. slide nos. L 19034 - L 19036 ) .

Diagnosis.

Pereonite 1 slightly sinuous on posterior margin of epimeron, postero-lateral corner nearly right-angled; pleopods 1, 3-5 exopods out curved on outer margins; pleopod 1 exopod with outer lobe much longer than inner lobe.

Description.

Body length of males 4.6-6.9 mm, of females 5.51 mm. Color in alcohol blackish brown, dorsum slightly granulated, bearing irregular white muscle spots. Pereonite 1 slightly sinuous on posterior margin of epimeron, postero-lateral corner nearly right-angled (Fig. 6 E ). Noduli laterales as in Fig. 10 A . Telson triangular, length about two thirds as long as width, lateral margin concave, apex blunted round; uropod exopodite about two and half as long as basipodite (Figs 6 E , 10 A ). — Cephalon with arched median lobe, median lobe slightly longer than lateral lobes (Figs 6 E , 10 A ). Antennula with several aesthetascs on distal tip of third article (Fig. 10 B ). Antennal flagellum with first segment about third as long as second one (Fig. 10 C ). — Pereopod 1 with brush of long setae on carpus and merus (Fig. 10 D ). Pereopod 7 ischium with deep depression on rostral surface, carpus slightly expanded on dorsal margin (Fig. 10 E ). — Pleopods 1-5 exopod with Protracheoniscus - type pseudotrachea (Fig. 10 F-J ). — MALE: pleopod 1 exopod bilobed at posterior tip, outer lobe much longer than inner lobe, endopod with broad basal part, narrowed towards beak-shaped posterior tip (Fig. 10 F ); pleopod 2 endopod styliform, a bit longer than exopod (Fig. 10 G ).

Etymology.

The new species is named after Dr. Christian Schmidt (Senckenberg Naturhistorische Sammlungen Dresden, Germany), who contributed profoundly to systematic research in woodlice; noun (name) in the genitive case.

Remarks.

The new species is very similar to L. nudus Li, 2017 in having the outer lobe of the pleopod 1 exopod much longer than the inner lobe. But it can be distinguished by the slenderer body shape and less developed epimeron (Fig. 6 E versus 6 F). Furthermore, the molecular data recognized both species as distinct taxonomic entities (Fig. 5 ).

Figures

Figure 5. Bayesian Consensus tree based on four-gene (COI + 18 S + 28 S + NaK) sequences. Asterisks and circles represent high node support with Bayesian posterior probabilities > 0.95 and maximum bootstrap values > 95. Coloured bars represent hypothesised species groupings.

Figure 6. Habitus of male Lucasioides species in dorsal view. A L. dissectus sp. nov.; B L. isseli (Arcangeli, 1927); C L. dianensis sp. nov.; D L. digitatus sp. nov.; E L. schmidti sp. nov.; F L. nudus Li, 2017; G L. formosus sp. nov.; H L. gracilentus sp. nov.; I L. subcurvatus sp. nov. (Scale: 1 mm).

Figure 10. Lucasioides schmidti sp. nov. A Holotype in dorsal view; B antennula; C antenna; D pereopod 1; E pereopod 7; F pleopod 1; G pleopod 2; H pleopod 3 exopod; I pleopod 4 exopod; J pleopod 5 exopod.