Hemiphrynus tenuicornis Jacoby 1891 RESTORED GENERIC PLACEMENT

Gilbert, Arthur J., 2011, A review and clarification of the alticine genera Hemiphrynus Horn 1889 and Phrynocepha Baly 1861 (Coleoptera: Chrysomelidae: Galerucinae: Alticini), Insecta Mundi 2011 (200), pp. 1-57 : 24-25

Hemiphrynus tenuicornis Jacoby 1891 RESTORED GENERIC PLACEMENT , incertae sedis

( Fig. 82 )

Hemiphrynus tenuicornis Jacoby 1891: 265 (tab. 41, fig. 23, male). Heikertinger and Csiki 1939: 214. Blackwelder 1946: 699.

Phrynocepha tenuicornis: Wilcox 1975: 108 . Furth and Savini 1996: 64. Furth 2006: 233.

Type Specimens. Lectotype (here designated and labeled). Male [ BMNH] labeled: “23” [handwritten on white], “TYPE/ H.T.” [printed on circular white with red border], “1226” [printed on blue], “Yolotepec” [printed on white], “Sp. figured.” [printed on white], “ Mexico./ Salle Coll.” [printed on white], “B. C. A., Col. VI, 1./ Suppl./ Hemiphrynus / tenuicornis ,/ Jac.” [printed on white], “ Hemiphrynus / tenuicornis ,/ Jac., [male symbol]” [handwritten on blue], “BM(NH)” [printed on white].

Paralectotypes (two here designated and labeled). Female [ MCZC] labeled: “Yolotepec” [printed on white], “ Mexico./ Salle Coll.” [printed on white], “ Hemiphrynus / sulcatipennis / Jac.” [handwritten on blue], “Jacoby 2 nd / Coll.” [printed on white], “Type/ 18643” [printed and handwritten on red]. Female [ BMNH] labeled: “1227” [printed on blue], “Yolotepec” [printed on white], “ Mexico./ Salle Coll.” [printed on white], “B. C. A., Col. VI, 1./ Suppl./ Hemiphrynus / tenuicornis, Jac. ” [printed on white], “ Hemiphrynus / tenuicornis ,/ Jac.” [handwritten on blue], “BM(NH)” [printed on white].

Two specimens in the type material are labeled as the type or holotype. The British Museum specimen was selected as the lectotype because it is a male and is labeled as the specimen pictured in the “Biologia Centrali-Americana” ( Jacoby 1891).

Redescription. Male [BMNH, lectotype]. Body length 4.29 mm; width at elytral humeri 1.82 mm; form elongate. Elytra shining, deep purple; head, pronotum, mesosternum, legs yellow-orange. Head not elongate, without ventral “jowl-like” area; genal length 0.75x length of eye; vertex shining, reticulate, impunctate; anterior margin of postclypeus broadly curved; frontal carina indistinct, only slightly raised in lateral view between antennal fossae; antennal fossae separated by twice width of antennal fossa (fossal width measured from inside edges); labrum orange, rectangular, with corners rounded, shining, impunctate; labral notch indistinct; frontal tubercles distinct, elevated, separated by coronal suture; area in front of antennal fossa without sunken appearance, without lateral carina; interocular distance 1.70x wider than width of both eyes combined; antennae slender, nearly as long as body; an- tennomeres 1-3 orange; 4-11 gradually darker; antennomere 2 shortest; 3 slightly shorter than 1 or 4; 5-6 longest; 7-11 gradually shorter. Pronotum transverse, smooth, shining, with a few inconspicuous punctures; posterolateral margins nearly parallel, gradually curving inward at front; basal depression absent; basal margin vaguely sinuate; anterolateral projections distinct, rectangular, with corners rounded; posterolateral angles distinct, obtuse. Scutellum orange-brown, shining, obtusely triangular, impunctate. Elytra shining, not reticulate, moderately, irregularly punctate; punctures nearly coalescing; humeri distinct, with obvious humeral costa and 4 additional incomplete, indistinct costae on each elytron. Prosternal intercoxal process level with prosternum, not elevated ventrally to level of procoxae, very narrowly, inconspicuously separating procoxae. Procoxae conical, appearing contiguous. Procoxal cavities open. Mesosternum orange. Legs including tarsi, orange; pro- and mesofemora not enlarged; tarsomere 1 of protarsi enlarged, wider than 3, about equal in length to 2-4 combined; mesotarsi similar to protarsi; tarsomere 1 of metatarsi not enlarged, not wider than 3, longer than 2-4 combined; all tibiae with central longitudinal carina along entire length. Abdomen dark brown, shiny, impunctate, sparsely pubescent; fifth ventrite broadly emarginate, with indistinct, broad terminal lobe.

Female. Similar to the lectotype, differing in the following characters: elytral costae more evident; tarsomere 1 of pro- and mesotarsi not enlarged; fifth ventrite entire.

Variation. The two female paralectotypes measured 4.76 mm and 4.17 mm in length and 2.05 mm and 1.76 mm in width. The single female non-type specimen measured 4.41 mm in length and 1.88 mm in width. The stout or slender appearance of the antennae, as represented by the fourth antennomere (length to width ratio), varies. In the specimens selected, the ratio of the fourth antennomere of the male is slender, approximately 3.6x longer than wide, while in the female the ratio of the fourth antennomere is very slender, approximately 5.3x longer than wide.

Remarks. For all the same reasons as H. sulcatipennis , H. tenuicornis is placed in Hemiphrynus , incertae sedis (see “Remarks” for H. sulcatipennis ). With only the lectotype, two paralectotypes and a single non-type female available, the proper generic placement for this species will need to wait until additional specimens are collected and related groups are studied. See the remarks for the other species for additional differences.

Distribution. Based on material here examined, H. tenuicornis is known only from Yolotepec, Oaxaca, Mexico. However, Furth (2006) reports this species from the state of Hidalgo as well.

Host. Unknown.

Specimens Examined. In addition to the lectotype and two paralectotypes, one other specimen was examined. MEXICO. UNKNOWN STATE: 67-56 (1) [BMNH].

Figures

Figures 81-82. Distributions. 81) Hemiphrynus in the western United States. 82) Hemiphrynus in Mexico.