Acanthotomicus enzoi Cognato and Smith, 2020

Cognato, Anthony I. & Smith, Sarah M., 2020, Acanthotomicus diaboliculus and A. enzoi (Coleoptera: Curculionidae: Scolytinae: Ipini), New Species from Southeast Asia, The Coleopterists Bulletin 74 (3), pp. 538-541 : 539-540

Acanthotomicus enzoi Cognato and Smith , new species

zoobank.org/ urn:lsid:zoobank.org:act:

( Figs. 6–9 )

Diagnosis (Male). Spines on declivital interstriae 2–6, 9, including larger spines on 4 and 9, distinguishes A. enzoi from A. diaboliculus , which has spines on 1, 3–9, with larger spines on 3, 7, 9, and from A. spinosus , which has spines on 2–9 with larger spines on 4–6.

Description. Holotype, male, total length ∼ 2.7 mm; antennae, head, legs, thorax, and elytra reddish-brown ( Figs. 6–9 ). Head. Epistomal setae present. Frons slightly convex, shagreened, punctures scattered; scattered frontal tubercles approximately mid-frons, one larger median tubercle ( Fig. 8 ). Scape longer than funicle; five funicular antennomeres including pedicel; antennal club flattened, longer than wide, with sensillae on anterior face, partitioned by two procurved sutures. Pronotum. 0.8 mm wide, 1.25× as long as wide; summit approximately on anterior third, scalpriform rugosities with interspersed setae on anterior half; posterior half disc shining, shallowly, minutely punctate, with scattered erect hair-like setae; base transverse, curved laterally. Scutellar shield. Triangular, flush with elytra ( Fig. 6 ). Elytra. Together 1.78× as long as wide. Elytral base transverse. Discal strial punctures uniseriate, nearly contiguous, impressed, subequal to width of interstriae; interstriae nearly impunctate (occasional setose puncture) ( Figs. 6, 7 ). Declivital margin of each elytron with 4 smaller and 2 larger subequal acute spines, the smallest as long as 3 strial punctures and the largest at least as long as 6 strial punctures; small first spine on interstria 2; small second spine on interstria 3; large third spine hooked inward on interstria 4; small fourth spine on interstria 5 connected by a low tumescence to the small fifth spine on interstria 6; the sixth large spine hooked upward, arising from interstria 9 and comprising the apex of the declivity ( Figs. 6, 7, 9 ). Declivital face with striae 1 and 2 curving laterally, declivital suture setose.

Female. Unknown.

Type Material. Holotype: male, “ THAI [LAND]: [ Phetchabun Province] Nam Nao N[ational] P[ark] , Castanopsis sp., vii 2005, Hulcr et al. coll; Aca.spi, DNA Ex[tract]” ( MSUC) .

Etymology. Named after our son Lorenzo (Enzo) Cognato and his often-prickly personality. Noun in apposition.

Hosts. This species is known from Castanopsis ( Fagaceae ).

Notes. Holotype dissected for DNA extraction; head, pronotum, and remaining body separated and glued to a paper point and pinned. Reported as A. spinosus in Cognato (2013) and Gao and Cognato (2018). Genbank accession numbers—COI: KF862795 , 16S: KF862717 , 28S: KF862748 , CAD: KF862831 ( Cognato 2013).

Figures

Figs. 1–9. Acanthotomicus diaboliculus, new species, paratype male: 1) Dorsal view; 2) Lateral view; 3) Anterior view; 4) Elytral declivity. 5) Female, elytral declivity. Acanthotomicus enzoi, new species, holotype male: 6) Dorsal view; 7) Lateral view; 8) Anterior view; 9) Elytral declivity.