Cycadophila nigra

Skelley, Paul, Xu, Guang, Tang, William, Lindström, Anders J., Marler, Thomas, Khuraijam, Jibankumar Singh, Singh, Rita & Rich, Stephen, 2017, Review of Cycadophila Xu, Tang & Skelley (Coleoptera: Erotylidae: Pharaxonothinae) inhabiting Cycas (Cycadaceae) in Asia, with descriptions of a new subgenus and thirteen new species, Zootaxa 4267 (1), pp. 1-63 : 10-11

Nigra species group

8(2). Submental-gular suture with deep circular depression ( Figs. 6 D, 8D).......................................... .. 9

- Submental-gular suture at most with small, weakly impressed pits, not forming a large distinct circular depression ( Figs. 7 D, 9B, 10D, 11D, 12D)................................................................................. 10

9(8). Pronotum more transverse, length to width ratio 0.72–0.79; China (Hainan, Hong Kong).................................................................................................... Cycadophila (C.) abyssa , new species

- Pronotum more elongate, length to width ratio 0.83; Vietnam....................... C. (C.) cyclochasma , new species

10(8). Pronotal lateral surface evenly convex, not reflexed near lateral carinae ( Fig. 7 E); metafemur of males notably enlarged ( Fig. 7 F); Thailand.................................................................. C. (C.) convexa , new species

- Pronotal lateral surface flattened to depressed, reflexed anteriorly ( Fig. 11 E), posteriorly or along entire carina; metafemur of male usually narrow ( Figs. 10 E, 12E).................................................................... 11

11(10). Pronotal anterior margin straight, not sinuate behind eyes; with distinct post-ocular ridge (temple); China, Thailand..................................................................................... C. (C.) torquata , new species

- Pronotal anterior margin curved, sinuate behind eye; lacking post-ocular ridge.................................... 12

12(11). Pronotum broad, width>1.60× length; elytral apex pale, otherwise lacking color pattern; Thailand................................................................................................... C. (C.) eurynota , new species

- Pronotum not broad, width <1.50× length; elytra with or without color pattern.................................. .. 13

13(12). Body narrowed, parallel-sided; pronotum appearing quadrate, width = 1.40× length ( Fig. 9 A); elytra mostly orange-red, with small central maculation along suture; male hind tibia not modified; China (Henan, Fujian)...................................................................................................... C. (C.) discimaculata (Mader)

- Body robust, sides evenly arcuate; pronotum appearing rectangular, width = 1.55× length ( Fig. 12 A); elytra mostly dark brown, possibly with narrow orange-red stripe along middle of each elytron; male hind tibia with inner margin swollen near midlength.......................................................................................... 14

14(13). Body larger, length>4.00 mm, entirely brown lacking color pattern; supraocular striae strong, reaching middle of eye; pronotal disc with basal sulcus long, length>4× basal width of sulcus; male hind tibial inner swelling large, angulate; China, India, Thailand, Vietnam................................................................. .. C. (C.) nigra (Gorham)

- Body smaller, length <3.50 mm, with or without color pattern; supraocular stria weak, occupying basal 1/4 of eye; pronotal disc with basal sulcus short, length <3× basal width; male hind tibial inner swelling small, rounded ( Fig. 12 E); China, India, Laos, Myanmar..................................................................................... 15

15(14)*. Elytra with humeral and apical pale spots, connected or not to form a complete medial stripe; Myanmar................................................................................................ ... C. (C.) vittata (Arrow)

- Elytra with or without color pattern; China, India, Laos............................. C. (C.) yunnanensis (Grouvelle) [* NOTE: Cycadophila (C.) intermedia (Chûjô) from Laos is not included in the key, since no specimens were available for study. See Remarks section under C. intermedia .]

Figures

FIGURE 6. Photographs of Cycadophila (Cycadophila) abyssa, paratype: A) dorsal habitus; B) ventral habitus; C) lateral habitus; D) head and prosternum, ventral; E) male genitalia.

FIGURE 7. Cycadophila (Cycadophila) convexa, male paratype: A) dorsal habitus; B) ventral habitus; C) lateral habitus; D) head and prosternum, ventral; E) head and pronotum, antero-lateral; F) hind leg, ventral; G) male genitalia.

FIGURE 9. Photographs of Cycadophila (Cycadophila) discimaculata, A) dorsal habitus of holotype; B) ventral head and prothorax of paratype; C) lateral habitus of holotype; D) holotype labels; E) lateral view of head and prothorax of holotype; F) male genitalia of paratype.

FIGURE 10. Photographs of Cycadophila (Cycadophila) eurynota, female holotype: A) dorsal habitus; B) ventral habitus; C) lateral habitus; D) head and prosternum, ventral; E) hind legs.

FIGURE 11. Photographs of Cycadophila (Cycadophila) torquata, paratype (unless noted): A) dorsal habitus; B) ventral habitus; C) lateral habitus; D) head and prosternum, ventral; E) head and pronotum, dorsal (holotype); F) male genitalia.

FIGURE 12. Photographs of Cycadophila (Cycadophila) vittata, holotype: A) dorsal habitus; B) ventral habitus; C) male genitalia; D) head and prosternum, ventral; E) right hind leg, ventral; F) labels.