Liella Burckhardt, Serbina and Malenovsky 2024, gen. nov.
Creators: name: Aléné Geonho Cho, Daniel Burckhardt Liliya Š. Serbina Igor Malenovský Dalva L. Queiroz Désirée C.
name: Percy, Diana M.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Mysida
Mysidae
Liella

description: Liella Burckhardt, Serbina and Malenovský gen. nov.
Zoobank registration: urn:lsid:zoobank.org:act: F4331451- EC37-4E7D-BC2B-EAD32D6F198A.
Type species: Paurocephala urenae Russell, 1946, by present designation.
Diagnosis: Adult. Head, in lateral view, deflexed 45–90° from longitudinal axis of body (Fig. 1I); in dorsal view slightly narrower than thorax, moderately transverse. Vertex rhomboidal; covered in imbricate microsculpture; passing smoothly into genae anteriorly; coronal suture fully developed; genae weakly produced ventrally but not enlarged into processes; frons widely trapezoidal; median ocellus visible or hidden in perpendicular view to vertex; compound eyes, in dorsal view, hemispherical, adpressed to head. Clypeus pear-shaped, medium-sized, rounded ventrally, hardly to well visible in lateral view. Antenna 10-segmented, distinctly shorter to longer than head width; flagellum with simple setae; segment 3 longest, longer than segment 4 and shorter than segments 4–6 together; segments 4, 6, 8, and 9 bearing each a subapical rhinarium lacking marginal spines. Pronotum, in dorsal view, almost straight, subrectagular, weakly curved posteriad laterally; propleurites narrowly subrectangular, divided by perpendicular suture into larger epimeron and smaller episternum. Metapostnotum with subacute tubercle. Mesosternum narrower than head, forming transverse band about three times as wide as long laterally; anterior margin weakly concave with median hump; pleurosternal suture not visible; basisternum large, oval to rhomboidal; katepisternum small antero-laterally, not bent dorsad laterally; angle between arms of precoxale acute or right. Metacoxa with short, tubular, apically blunt meracanthus (Fig. 6C). Metafemur with the three ventral sense organs in submedial position (Fig. 6L); apex with a group of stout long setae.Metatibia as long as or longer than metafemur, hardly widened apically, without spur-like setae along length of metatibia; bearing seven or eight evenly spaced, weakly sclerotized apical spurs, without posterior peg-like or thorn-like setae (Fig. 7H). Both metatarsal segments relatively short; subequal in length or basal segment distinctly longer than apical one. Forewing oblong-oval, widest in the middle or in apical third; 2.2–2.7 times as long as wide, membranous; vein C + Sc weakly convex, slender, distinctly delimited from cell; costal break developed, close to apex of vein R 1; pterostigma narrow or wide, entirely membranous; nodal line developed; vein R as long as or shorter than M + Cu; vein Rs weakly or strongly convex relative to costal margin; vein M longer than M 1 + 2; vein Cu 1a curved towards anal margin; veins M 1 + 2 and M 3 + 4 perpendicular or oblique to wing margin apically; anal break adjacent to apex of vein Cu 1b; surface spinules (Fig. 8F) fine or coarse, spaced or dense, present in all cells, or sometimes partially lacking. Hindwing slightly shorter than forewing; with one to four costal setae proximal to costal break and two distinct groups distal to costal break, with two or three setae proximally and three to five setae distally (Fig. 8J); vein R + M + Cu indistinctly trifurcating, base of vein Cu indistinct. Abdominal base with a sclerotized area on either side covered in spines. Male proctiger with elongate or small rounded lateral plates posteriorly (Fig. 9B). Aedeagus (Fig. 9H) with simple, subapically smooth proximal portion; apex of distal portion differentiated from stem. Female subgenital plate bearing apical process.
Last instar immature.Antenna three segments; usually bearing sectasetae or lanceolate setae on antennal flagellum. Mid- and hindlegs without massive peg-like setae. Dorsal body surface usually lacking minute clavate setae. Precaudal abdominal tergites lacking densely spaced simple setae or sectasetae. Anus in ventral position; lacking additional pore fields developed.
Etymology: Dedicated to the Chinese entomologist Li Fasheng for his fundamental contribution to the taxonomy of Chinese psyllids.
Comments: Monophyly strongly supported in the molecular analyses (Fig. 10; Supporting Information, File S4), and weakly in the morphological analysis by one homoplastic character that we consider a non-unique synapomorphy (Fig. 11). Included species, distribution, and host plants are summarized in Table 3 and Supporting Information, File S3. The following new combinations are proposed here: Liella abutili (Mifsud and Burckhardt 2002: 1943), comb. nov. (from Paurocephala); L. boxi (Mifsud and Burckhardt 2002: 1949), comb. nov. (Paurocephala); L. gossypii (Russell 1943: 115), comb. nov. (Paurocephala); L. hollisi (Mifsud and Burckhardt 2002: 1956), comb. nov. (Paurocephala); L. insolita (Mifsud and Burckhardt 2002: 1956), comb. nov. (Paurocephala); L. lanceomedia (Brown and Hodkinson 1988: 37), comb. nov. (Paurocephala; Diclidophlebia, Burckhardt and Mifsud 2003: 14); L. lienhardi (Mifsud and Burckhardt 2002: 1959), comb. nov. (Paurocephala); L. lucida (Mifsud and Burckhardt 2002: 1960), comb. nov. (Paurocephala); L. medleri (Mifsud and Burckhardt 2002: 1964), comb. nov. (Paurocephala); L. paucivena (Brown and Hodkinson 1988: 39), comb. nov. (Paurocephala; Diclidophlebia, Burckhardt and Mifsud 2003: 14); L. sinuata (Mifsud and Burckhardt 2002: 1974), comb. nov. (Paurocephala); L. urenae (Russell 1946: 94), comb. nov. (Paurocephala).
description: Published as part of Aléné Geonho Cho, Daniel Burckhardt Liliya Š. Serbina Igor Malenovský Dalva L. Queiroz Désirée C. & Percy, Diana M., 2024, Phylogeny and classification of jumping plant lice of the subfamily Liviinae (Hemiptera: Psylloidea: Liviidae) based on molecular and morphological data, pp. 387-421 in Zoological Journal of the Linnean Society 201 (2) on pages 410-411, DOI: 10.1093/zoolinnean/zlad128, http://zenodo.org/record/13219879