Lucaina milleri Ferreira and Ivie, 2018

Ferreira, Vinicius S. & Ivie, Michael A., 2018, A Review of the Nearctic Genus Lucaina Dugès, 1879 (Coleoptera: Lycidae: Lycinae: Calochromini), with Descriptions of Two New Species, The Coleopterists Bulletin 72 (3), pp. 393-406 : 404-405

Lucaina milleri Ferreira and Ivie , new species

( Figs. 7 , 13 , 21 , 26 ) Zoobank.org/ urn:lsid:zoobank.org:act:3A6B8607-649A-47B0-AA20-F0BC832B04F2

Diagnosis. Lucaina milleri can be easily identified among other Lucaina by the shortened labrum with curved mandibles ( Fig. 13 ), the yellowish elytra with the apical half to 2/3 black, the pronotum completely black ( Figs. 7 , 13 ), and the male genitalia with the median lobe slightly shorter than the parameres with a narrowed apex ( Fig. 21 ).

Description of Adult. Width across humeri 1.4–1.8 mm; elytral length 4.3–5.6 mm. Dorsal color predominantly black, elytra yellowish, with half or 2/3 of apical portion black and pronotum completely black ( Fig. 7 ). Head prolonged in short rostrum, with coronal longitudinal sulci more or less prominent ( Fig. 13 ). Mandibles short, slightly curved, connate to transverse, shortened labrum. Maxillary palpomere IV and labial palpomere III longer than wide. Antennae subserrate, slightly dorsoventrally flattened, inserted below eyes. Antennomere I subconical, elongate, as long as III, antennomere II about half length of I, antennomere III slightly shorter than I, broad, IVabout 1/4 shorter than III, V subequal to IV, antennomeres VII–XI gradually decreasing in length. Pronotum as long as wide, thin margins slightly pronounced, angles rounded, with a pair of subtle oblique elevations arising from posterior lateral margins of pronotum. Elytra subparallel, densely punctate, lateral margins stout, elytral costae indistinct, pubescence decumbent. Male genitalia with median lobe slightly shorter than parameres, apex of median lobe narrowed, acuminate; parameres parallel-sided in basal portion, fusiform in apical portion, ventral base of parameres elongate, about 1/3 total length of parameres ( Fig. 21 ).

Female. Unknown.

Biology. Lucaina milleri was collected on Erigonum inflatum Torrey ( Polygonaceae ) and mesquite flowers ( Prosopis ) ( Fig. 24 ).

Distribution. California, USA and Baja California, Mexico ( Fig. 26 ).

Etymology. This species is named in honor of the lycid systematist Richard Stuart Miller.

Type Material. Holotype 6: California : Imperial Co.; Mountain Springs / B. K. Dozier; VI-24-1979 / Collected on; Erigonum; inflatum ( FSCA) . Paratypes: BAJA CALIFORNIA. 26: 2.5mi. S.W. San Borja ; Baja California; Mexico VI-21-1968 / Collectors: N. Leppla; J. Davidson, J. Bigelow; M. Bentzien, W. Fox; S. Williams, M. Cazier ( ASTU) . 46: MEX. Baja Calif. Norte ; 1mi W San Borja; June 12-13, 1967; EL Sleeper & EM Fisher / California State; Univ Long Beach; 1996 donation; Calif. Acad. Sci (3 CASC, 1 MTEC) . 16: MEX. Baja Calif. Norte ; 3mi W San Borja; June 12-13, 1967; EL Sleeper & EM Fisher / California State; Univ Long Beach; 1996 donation; Calif. Acad. Sci ( CASC) . CALIFORNIA. 16: Los Angeles (Rancho); Baja California; Mexico VI-24-1968 / Collectors: N. Leppla; J. Davidson, J. Bigelow; M. Bentzien, W. Fox; S. Williams, M. Cazier ( ASTU) .

Figures

Figs. 1–7. Lucaina species, dorsal habitus. 1) L. schini (lectotype photograph from UNAM, used with permission); 2) L. marginata (lectotype); 3) L. discoidalis (lectotype photograph from MCZC, used with permission, ©President and Fellows of Harvard College); 4) L. bajacalifornica (holotype photograph from UNAM, used with permission); 5) L. greeni (holotype); 6) L. greeni (bluish black elytra); 7) L. milleri.

Figs. 8–13. Lucaina species, head, frontal view. 8) L. schini (lectotype photograph from UNAM, used with permission); 9) L. marginata (lectotype); 10) L. discoidalis (lectotype photograph from MCZC, used with permission, ©President and Fellows of Harvard College); 11) L. bajacalifornica (holotype photograph from UNAM, used with permission); 12) L. greeni (holotype); 13) L. milleri.

Figs. 16–21. Lucaina species, male genitalia, ventral and dorsal views, respectively. 16) L. schini; 17) L. marginata; 18) L. discoidalis; 19) L. bajacalifornica (holotype photograph from UNAM); 20) L. greeni; 21) L. milleri.

Figs. 26–27. Maps of the distribution of: 26) Lucaina milleri, Lucaina schini, Lucaina marginata, Lucaina discoidalis, and Lucaina bajacalifornica; 27) Lucaina greeni.

Figs. 22–25. Lucaina species, female ventrite VII. 22) L. schini; 23) L. marginata; 24) L. discoidalis; 25) L. greeni.