Cycadophila nigra
Creators: name: Skelley, Paul
name: Xu, Guang
name: Tang, William
name: Lindström, Anders J.
name: Marler, Thomas
name: Khuraijam, Jibankumar Singh
name: Singh, Rita
name: Rich, Stephen
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Erotylidae
Cycadophila
Cycadophila nigra

description: 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.]
description: Published as part of 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, pp. 1-63 in Zootaxa 4267 (1) on pages 10-11, DOI: 10.5281/zenodo.575641