Lalokia, Szawaryn & Tomaszewska, 2013
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publication ID |
https://doi.org/ 10.1080/00222933.2012.763067 |
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publication LSID |
lsid:zoobank.org:pub:F721B07F-CBF0-4516-853D-1FD434FE06F1 |
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persistent identifier |
https://treatment.plazi.org/id/2665A7C5-2443-46E6-9FC3-B8680E0E8F4A |
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taxon LSID |
lsid:zoobank.org:act:2665A7C5-2443-46E6-9FC3-B8680E0E8F4A |
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treatment provided by |
Felipe |
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scientific name |
Lalokia |
| status |
gen. nov. |
Lalokia View in CoL View at ENA gen. nov.
Type species. Epilachna aruensis Crotch, 1874 .
Etymology
The generic name stems from the Laloki River, located in eastern Papua New Guinea, from which nearest neighbourhood one of the examined specimens of this species was collected.
Diagnosis
Lalokia is very similar to Papuaepilachna and Afidentula sharing with both genera the basal angulation of tarsal claw and non-divided female abdominal sternite VIII. It also shares with Afidentula the lack of tibial spurs and presence of almost complete epipleural, submarginal carina. With Papuaepilachna it additionally shares mandibles large, thin laterally with apical and subapical teeth, most often additionally serrated, terminal labial palpomere longer than subterminal one, maxilla with basistipes and mediastipes with at most only trace of suture visible between them, distance between antennal sockets three to four times greater than a distance between antennal socket and inner margin of eye, elytral epipleura complete, coxites with distinct styli and tegmen with stout parameres. Lalokia , however, is distinguished from both discussed genera by prementum provided on dorsal surface with short, scale-like appendages, ligula without apical setae, labial palpi placed subapically on prementum and mentum strongly transverse (more than twice as wide as long). Additionally transverse prementum, long submarginal epipleural carina, reaching at least anterior margin of mesocoxa, sperm duct very short and a lack of tibial spurs will distinguish Lalokia from Papuaepilachna .
Externally Lalokia aruensis is very distinctive by having two orange-red maculae on each elytron and among Australasian Epilachnini resembles only members of the genus Subafissa but can be easily separated by having tarsal claws with a basal angulation that is absent in Subafissa .
Description
Body ( Figures 2A View Figure 2 , 15C View Figure 15 ) oval, convex; dorsum pubescent. Pronotum with dark disc and yellow lateral margins; elytra dark brown with four large, orange maculae. Ventral side yellow or brownish-yellow.
Head exposed, transverse; ventral antennal grooves absent. Eyes finely faceted; barely emarginate. Antennal insertions ( Figure 1I View Figure 1 ) exposed in front of eyes, close to inner eye margins, with distance between antennal sockets about 3.8 times greater than distance between antennal socket and inner margin of eye. Antenna ( Figure 1A View Figure 1 ) shorter than width of head; 11-segmented; scape large, swollen, about twice as long as pedicel; pedicel longer than wide, swollen; antennomere 3 elongate, longer than antennomeres 4–6 combined; antennal club relatively compact, three-segmented, asymmetrical on inner surface. Clypeus transverse; labrum transverse ( Figure 1B View Figure 1 ), covered with dense, long setae, anterior margin emarginate. Mandible ( Figure 1F, G View Figure 1 ) provided with two apical and two subapical long teeth; upper apical tooth with additional shallow incision; subapical teeth large; all teeth without apparent additional denticles; prostheca large, long, densely setose; near base of mandible at outer margin on dorsal surface there are several long setae; dorsal and ventral surfaces basally with areas of small dense pores (sensillae?). Submentum transverse, fused with gula with suture well visible; labium ( Figure 1C–E View Figure 1 ) with mentum strongly transverse; prementum short, transverse, sclerotized; dorsal surface covered with scalelike appendages bearing short setae in mid line; labial palp placed subapically on prementum, three-segmented; basal palpomere short, transverse; second palpomere about as long as wide, weakly widening anteriorly; terminal palpomere elongate, narrowing anteriorly. Maxilla ( Figure 1H View Figure 1 ) with cardo subtriangular, covered with several long setae; basistipes and mediastipes not separated, with suture rather visible; galea large suboval, weakly concave on inner margin, densely setose apically; lacinia small, suboval, transverse, covered with long, dense setae; maxillary palp foursegmented, palpomeres 2–4 widened apically, pubescent; palpomere 2 short, slightly longer than palpomere 3; terminal palpomere 1.5 times wider along apical margin than on base. Gula ( Figure 1J View Figure 1 ) transverse; gular sutures long and deep, convergent anteriorly.
Pronotum transverse, widest at base and gradually narrowing anteriorly; anterior and hind margins not bordered; disc convex, finely punctate. Prothoracic hypomeron smooth; notosternal suture distinct; prosternum ( Figure 2B View Figure 2 ) in front of coxa about 0.5 times as long as coxal longitudinal diameter, anterior edge raised with distinct groove behind it; hind margin of prosternum in front of coxae with groove; prosternal process about 0.3 times as wide as longest coxal diameter, with weak concavities along its lateral margins; procoxal cavity strongly transverse with small triangular slit laterally.
Mesoventrite ( Figure 2C View Figure 2 ) with anterior edge with complete raised border and with weak groove behind it; mesal surface with cavity receiving apex of prosternal process; mesoventral process narrower than coxal diameter; meso-metaventral articulation with suture visible; junction straight, without internal knob. Scutellum small, triangular. Elytra at base distinctly broader than pronotum; dually punctate; humeral angles well developed; lateral margins widely flattened, visible from above throughout; elytral epipleuron complete ( Figure 2A View Figure 2 ), flat without foveae, with submarginal carina almost complete; metaventrite with intercoxal process broadly bordered and raised; metaventral postcoxal lines connected medially and complete laterally, straight with distinct groove behind ( Figure 2C View Figure 2 ); metaventrite with discrimen incomplete; metanepimeron distinct.
Legs moderately long and stout with hind femora protruding from outer margin of elytral epipleuron ( Figure 2A View Figure 2 ). Trochanters simple, on inner margin with weak cavity for receiving tip of tibia ( Figure 2B View Figure 2 ). Femora cylindrical with weak grooves throughout for receiving tibiae. Tibiae cylindrical without apical spurs; tarsi pseudotrimerous; tarsal claw bifid, with additional large, subquadrate basal tooth.
Abdomen ( Figure 2P, Q View Figure 2 ) with six ventrites in males and five ventrites in females with sternite VIII partly visible. Ventrite 1 in mid line more than twice as long as ventrite 2. Abdominal postcoxal lines separate medially, recurved and incomplete, reaching half length of ventrite 1; apical margin of male ventrite 5 truncate, ventrite 6 emarginate ( Figure 2G View Figure 2 ), abdominal tergite VIII rounded ( Figure 2F View Figure 2 ); apical margin of female ventrite 5 weakly rounded, sternite VIII arcuate, entire ( Figure 2E View Figure 2 ), tergite VIII subtruncate ( Figure 2D View Figure 2 ).
Male terminalia and genitalia ( Figure 2K–M View Figure 2 ). Apodeme of male sternum IX rodlike. Tergite X with anterior margin weakly emarginate and posterior margin truncate. Tegmen with penis guide subtriangular in lateral view, narrowing towards apex with apical part curved outwardly; with lateral sides symmetrical; parameres slightly shorter than penis guide, broad, separated, articulated with phallobase, with apices shortly setose; tegmen strut broadened apically. Penis base with arms poorly developed; penis thin, curved basally, then straight, rod-like towards apex.
Female genitalia ( Figure 2H–J View Figure 2 ). Proctiger (TX) sclerotized, short, rounded apically; coxites oval with styli terminal, and with small protuberances on inner margin; infundibulum absent. Bursa copulatrix large, non-divided, ending with outlet of sperm duct, outlet of common oviduct placed dorsally protruding above half length of bursa copulatrix. Sperm duct very short and narrow, simple, uniform in diameter; spermatheca small, membranous, long-oval, without clear nodulus and ramus; accessory gland long, widening apically.
Distribution
Aru Islands, New Guinea.
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