Psalidognathus vershinini

Humanity space International almanac VOL. 8, No 4, 2019: 482-487

A new species of Psalidognathus Gray, 1831 (Coleoptera, Cerambycidae, Prioninae) from Ecuador

A.S. Zubov1, A.Yu. Titarenko2

1Bolotnikovskaya str., 6B, apartment 103, Moscow 117556 Russia
e-mail: riprulez@mail. ru
2Publicly Traded Company “Morpho Absoloni” Bolotnikovskaya str., 5/3, Moscow 117556 Russia e-mail: odindva3@gmail. com

Key words: Psalidognathus, Cerambycidae, Prioninae, new species, Ecuador. Abstract: A new species of Psalidognathus (Gray, 1831) from Ecuador being described. Species is related to P. onorei (Quentin & Villiers, 1983) and P. сerberus (Santos-Silva & Komiya, 2012) from Ecuador but has range of differences in morphology.

Genus Psalidognathus (Gray, 1831) contains 11 species distributed from Costa Rica in the North to Bolivia on the South (SSILVA). The group has a range of difficulties that makes them hard to study, mostly due to the absence of good series of many species of the genus in collections. A new specie from Ecuador is being described related to P. onorei and P. cerberus.

Material and methods
The authors have used traditional methods of morphological examination. Comparative analysis is made using stereo microscope Zeiss Stemi 2000-C.
The following abbreviations are used to locate the storage of paratype specimens:
AT - the private collection of Andrey Yu. Titarenko (Moscow, Russia)
BM - The Museum für Naturkunde - Leibniz Institute for Evolution and Biodiversity Science (Berlin, Germany)

A.S. Zubov, A.Yu.Titarenko Psalidognathus vershinini, sp. n.
Fig. 1-5


Body length 60-65 mm. All body and parts colored from light brown to blackish brown. Antennae in males 1-3 segments blackish brown, 4-11 becoming from brown to pale brown to the last segment. In females only 1st segment is dark brown. Male’s head and pronotum are almost black and mandibles are black, in female mandibles are brown-black and head is almost brown, pronotum lighter than head. Elytra in male are dark brown, in females are light brown. Legs of male and female are dark brown, lighter at the apex of protibia. Head and pronotum of male and female rugose. Base (1/3) of male’s elytra rugose, the other 2/3 in dense punctuation, slightly rugose. Female’s elytra strongly rugose. Humerus with small denticle. Elytra long, in females 1,5 times long as wide, in males 1,75 times long as wide (in it’s widest part). Mandibles long and curved, in female slightly longer than head; left mandible’s inner edge almost straight, with small tooth closer to the mandible’s base, right mandible’s inner edge unevenly indented. In male mandibles are 1.3 times longer than head, slightly curved, left mandible with expansion at apical half with smooth sharp edge and a small tooth behind the middle; right mandible more straight, with bigger tooth near the base. Both male’s and female’s mandibles in deep and dense punctuation except inner edge (FIG TEBE). Maxillary palpi long, same length in males and females, in males slightly longer than mandibles, slightly axially enlarged at the apex. Antennae long, in female 4/5 of body length, in male almost reaching end of elytra. 1st antennal segment very short, twice long as wide, in very dense and deep punctuation. 3d segment very long, 3 times longer than 1st segment, 2 times longer than 4th segment. Head with two small narrow processes on the sides slightly curved backwards. Cephalic carinae divergent, ending with small spikes near the base of the head, the spikes bigger in male. Eyes long and narrow with deep cutout. Distance between eyes almost half of the heads width. Pronotum wide, in males almost 2,2 times wide as long. Sides of pronotum with 2 smaller and two bigger spikes. Females pronotum 2,3 times wide as long, with 3 long and wide and 1 small spikes, trapezoid shape frontal side wider; sides of female’s pronotum slightly flattened. Scutellum round. Prosternal process rather short Male’s protibia with dense short hairs on the inner edge, protibial widened in the apical half. Protibia in deep small and raher rare punctuation. Front tarsi first 3 segments of both female and male short and narrow, the claw segment long, almost as long as first 3 segments. Oher tarsi long, almost 2 times longer than front tarsi. In female pubescence absent, in male thorax and last 2 abdominal segments in long dense golden hairs.


Holotype, male (BM); Paratype, female (AT): Ecuador, 8 km N of Mera, VI.1991.
Comparative analysis and discussion. The new species is similar to P. cerberus, P. onorei and P. reichei. Both males and females have wide range of differences. From P. reichei, P. pubescens and P . antonkozlovi males of P . vershinini, sp. n. can be easily distinguished by absence of pubescence on pronotum.
Male’s mandibles of P. vershinini, sp. n. long, shape close to P. reichei and major form of P. onorei, but shorter and more thick than in P. reichei.
Cephalic carinae of P. vershinini, sp. n. go further than lateral processes with bigger spikes unlikely in P. reichei. Distance between carinae less than in P. reichei, but notably wider than in P. onorei and P . cerberus. Side processes of P . vershinini, sp. n. have distinctive shape (male and female have same shape, a little bit bigger in male) wider and longer than in P. reichei, P. onorei and P. cerberus that have triangular and pointed shapes of processes.
1st antennal segment of P. vershinini, sp. n. is very short, notably shorter than in P. onorei and P. cerberus. 1st segment shape can be compared only with P. pubescens and P. antonkozlovi. Antannae of both male and female P. vershinini, sp. n. are thin, notably narrower than in P . onorei and P . cerberus. 3rd antennal segment of P. vershinini, sp. n. in very dense punctuation, in P. onorei and P. cerberus in rare punctuation, glabrous.
Spikes on the sides of pronotum are notably smaller than in P. onorei and P. cerberus (more similar to P. pubescens both male and female).
Protibia of male of P. vershinini, sp. n. (Fig. 3) are widened stronger and more evenly than of P. onorei and P. cerberus. Etymology. The new species is named after Vershinin Lev Removich (Odessa, Ukraine, 14.08.1957), historian, writer and political scientist.


We thank Anton Kozlov for giving us the specimen we used to describe the new species.

Santos-Silva A., Komiya Z. 2012. Contribution towards the knowledge of Psalidognathus Gray, 1831 (Coleoptera, Cerambycidae, Prioninae). - Insecta Mundi. 0247: 1-28.
Noguchi T., Santos-Silva A. 2016. A new species of Psalidognathus Gray, 1831 from Peru (Coleoptera: Cerambycidae: Prioninae). - Insecta Mundi. 0508: 1-6.
Prioninae of the world. - URL:
Tavakilian G. TITAN: Cerambycidae data-base (version Apr 2015). G. Tavakilian, H. Chevillotte. Roskov Y., Abucay L., Orrell T., Nicolson D., Bailly N., Kirk P. M., Bourgoin T., DeWalt R. E., Decock W., De Wever A., Nieukerken E. van, Zarucchi J., Penev L. (eds.). Species 2000 & ITIS Catalogue of Life, 22nd March 2017. - Digital resource at:
Quentin R.M., Villiers A. 1983. Note sur les Psalidognathus Gray. Description de quatre formes nouvelles; désignation d’un néotype et de lectotypes (Col. Cerambycidae Prioninae). - Annales de la Société Entomologique de France, Paris. (N. S.) 19 (4): 441-446, 4 figs.

Location: Ecuador
Max. size: 65mm