Paracyclidius Howden, 1971

Rodrigues, Diego F., Grossi, Paschoal C. & Vaz-de-Mello, Fernando Z., 2025, Taxonomic revision of Cremastocheilini (Coleoptera: Scarabaeidae: Cetoniinae) from South America and an updated key for the genera of the New World, Journal of Natural History 59 (17 - 20), pp. 1063-1125 : 1104

Genus Paracyclidius Howden, 1971

( Figures 1 (I), 23 –27, 32(H-L))

Type species

Cremastocheilus axillaris Gory and Percheron 1833 ( Figure 17 ), designated by monotypy.

Taxonomic history

Paracyclidius Howden, 1971, p. 226 (original description). – Krikken 1976 (key to the genera of Cremastocheilini ). – Krikken 1984: 45 (catalogue of genera). – Krajčik 1999: 42 (catalogue). – Ratcliffe 2002: 39 (checklist). – Schoolmeesters 2024 (catalogue).

Diagnosis

Paracyclidius is recognised by the following combination of characters: Clypeal projection bent upwards in frontal view, evenly arched ( Figures 23 (C)–26(C), 32 (H)); frons without posterior tubercles ( Figure 32 (H)); pronotum suborbicular ( Figures 23 (A)–26(A), 1(I)), lacking a border on the lateral margin; the spiracle of the last tergite is always visible and not elevated.

Redescription

Same as for the species, since it is monospecific.

Geographical distribution

Paracyclidius is known from Brazil, French Guiana, Panama, Peru, and Trinidad and Tobago.

Figures

Figure 1. Pronotum shapes of Cremastocheilini genera from the Americas. (A) Centrochilus Krikken, 1976. (B) Cremastocheilus Knoch, 1801. (C) Cyclidiellus Krikken,1976. (D) Cyclidinus Westwood,1874. (E) Cyclidius MacLeay, 1838. (F) Genuchinus Westwood, 1874. (G) Krikkenjanius Rodrigues, Grossi and Vazde-Mello gen. n. (H) Lissomelas Bates, 1889. (I) Paracyclidius Howden, 1971. (J) Psilocnemis Burmeister, 1842. (K) Quititinus Rodrigues, Grossi and Vaz-de-Mello gen. n.

Figure 17. Cyclidius rohdei Kolbe, 1893. Male at CMN (Bolivia, Santa Cruz, Ichilo, Rio Ichilo). (A) Habitus, dorsal view. (B) Habitus, ventral view. (C) Head, frontal view. (D) Protibia, dorsal view. (E) Habitus, dorsolateral view.(F) Habitus, lateral view. (G) Aedeagus,lateral view. (H) Parameres,dorsal view. Scale bars = 1 mm.

Figure 23. Paracyclidius axillaris (Gory and Percheron, 1833) comb. n. Male at CEMT, variation elytra half reddish orange (Brazil, Amazonas, Manaus). (A) Habitus, dorsal view. (B) Habitus, ventral view. (C) Head, frontal view. (D) Protibia, dorsal view. (E) Habitus, dorsolateral view. (F) Habitus, lateral view. (G) Aedeagus, lateral view. (H) Parameres, dorsal view. Scale bars = 1 mm.

Figure 32. (A) Habitus of lectotype of Cetonia elongata Olivier, 1789 at MNHN. (B) Type figure of Cyclidius lacordairei Thomson, 1860 (from Lacordaire 1856, Pl. 39; Figure 3). (C) Habitus of lectotype of Cyclidius acherontius Kolbe,1893 at MFNB.(D) Labels of lectotype of Cetonia elongata. (F) Identification of Lacordaire of Cyclidius lacordairei. (G) Dorsal view of head. Arrows point to the anterior margin of clypeus, and to the two tubercles posteriorly on the frons above in Cyclidius elongatus (Olivier, 1789).