Lucasioides formosus 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

publication ID

https://doi.org/ 10.3897/asp.82.e113041

publication LSID

lsid:zoobank.org:pub:B2966C0A-75B7-4B73-A45C-0A2EFB159715

DOI

https://doi.org/10.5281/zenodo.12627272

persistent identifier

https://treatment.plazi.org/id/989DCD87-7808-4D8F-B7AD-49FA36C7A95C

taxon LSID

lsid:zoobank.org:act:989DCD87-7808-4D8F-B7AD-49FA36C7A95C

treatment provided by

Arthropod Systematics & Phylogeny by Pensoft

scientific name

Lucasioides formosus Li & Wang
status

sp. nov.

3.3. 5. Lucasioides formosus Li & Wang sp. nov.

Figures 6 G View Figure 6 , 11 View Figure 11

Type material.

Holotype. CHINA • 1 ♂; Yunnan Province, Lijiang City, Yulong County, Liming Lisu Ethnic Township, Houka ; 27.1469 ° N, 99.8193 ° E, el. 1921 m a. s. l.; 8. vii. 2022; J. Wang, X. K. Hong leg. (DNA no. HK 2201 , Prep. slide no. L 22081 ) GoogleMaps . — Paratypes. • 2 ♂♂, 2 ♀♀; same data as the holotype (DNA nos. HK 2202 - HK 2205 ) GoogleMaps . CHINA • 1 ♂, 4 ♀♀; Yunnan Province, Lijiang City, Zimei lake ; 26.9891 ° N, 100.1966 ° E, el. 2724 m a. s. l.; 7. vii. 2022; J. Wang, X. K. Hong leg. (DNA nos. ZMH 2201 View Materials - ZMH 2205 View Materials , Prep. slide no. L 22082 ) GoogleMaps . • 2 ♂♂, 4 ♀♀; Yunnan Province, Dali City, Jianchuan County, Qianshi Mountain ; 26.5328 ° N, 99.8877 ° E, el. 2364 m a. s. l.; 11. vii. 2022; J. Wang, X. K. Hong leg. (DNA nos. QSS 2201 - QSS 2206 , Prep. slide no. L 22076 ) GoogleMaps . • 4 ♀♀; Yunnan Province, Lijiang City, Gucheng District ; 26.9258 ° N, 100.2079 ° E, el. 2465 m a. s. l.; 7. vii. 2022; J. Wang, X. K. Hong leg. (DNA nos. LJGC 2201 - LJGC 2204 ) GoogleMaps . • 3 ♀♀; Yunnan Province, Lijiang City, Meiquan Village ; 26.9058 ° N, 100.1499 ° E, el. 2486 m a. s. l.; 6. vii. 2022; J. Wang, X. K. Hong leg. (DNA nos. MQC 2201 - MQC 22032205 ) GoogleMaps .

Diagnosis.

Pereonite 1 slightly sinuous on posterior margin of epimeron, postero-lateral corner nearly right-angled; noduli laterales on pereonites 1-4 shifted from lateral margins than those of pereonites 5-7; pereopod 7 remarkably expanded on dorsal margin of carpus; pleopod 1 exopod slightly concave at posterior tip.

Description.

Body length of males 6.3-8.0 mm, of females 5.5-11.0 mm. Color in alcohol blackish brown, dorsum granulated, bearing irregular yellowish white muscle spots (living individuals with yellowish blue muscle spots). Pereonite 1 slightly sinuous on posterior margin of epimeron, postero-lateral corner nearly right-angled (Fig. 6 G View Figure 6 ). Noduli laterales on pereonites 1-4 shifted from lateral margins than those of pereonites 5-7 (Fig. 11 A View Figure 11 ). Telson triangular, width about twice as long as length, lateral margin slightly concave, apex blunted; uropod exopodite about three times as long as basipodite (Figs 6 G View Figure 6 , 11 A View Figure 11 ). — Cephalon with arched median lobe, median lobe longer than lateral lobes (Figs 6 G View Figure 6 , 11 A View Figure 11 ). Antennula with several aesthetascs on distal tip of third article (Fig. 11 B View Figure 11 ). Antennal flagellum with second segment twice as long as first one (Fig. 11 C View Figure 11 ). — Pereopod 1 with brush of long setae on carpus and merus (Fig. 11 D View Figure 11 ). Pereopod 7 ischium without deep depression on rostral surface, carpus remarkably expanded near middle on dorsal margin (Fig. 11 E View Figure 11 ). — Pleopods 1-5 exopods with Protracheoniscus - type pseudotrachea (Fig. 11 F-J View Figure 11 ). — MALE: pleopods 1 exopod slightly concave at posterior tip, forming two inconspicuous lobes, endopod with broad basal part, narrowed towards apex, posterior tip beak-shaped and bent outwards (Fig. 11 F View Figure 11 ); pleopod 2 exopoddistinctive concave on outer margin, posterior two fifths with several setae, endopod styliform, slightly longer than exopod (Fig. 11 G View Figure 11 ).

Etymology.

Latin “ formosus ” = beautiful. The new species name is an allusion to beautiful yellowish blue muscle spots on the dorsum of the living individuals.

Remarks.

The new species is not strictly consistent with the generic characters of Lucasioides because of the noduli laterales on pereonites 1-4 shifted from lateral margins than those of pereonites 5-7 instead of the noduli laterales on pereonites 2-4 much farther from lateral margins than those of pereonites 1, 5-7. It is difficult to give a ready answer for this dilemma based on the morphological evidence alone. In the phylogenetic analyses, the relationship between this species and the other Lucasioides species is well-supported (Fig. 5 View Figure 5 ). Hence, we assigned this species as a member of Lucasioides by integrating molecular and morphological evidence in this context.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Isopoda

Family

Agnaridae

Genus

Lucasioides