Pseudomalus triangulifer (Abeille, 1877)


Database of the Italian Chrysididae

Pseudomalus triangulifer (Abeille, 1877)

Pseudomalus triangulifer (Abeille, 1877)
Chorology: European
Chorology: European
Italian distribution of Pseudomalus triangulifer
Italian distribution

Systematic position of Pseudomalus triangulifer (Abeille, 1877)

Subfamily & Tribe Chrysidinae (Elampini) Size (mm)
Size (mm):
Genus & species Pseudomalus triangulifer (Abeille, 1877)
Species group  
Original combination Omalus triangulifer Abeille, 1877
Type series Lectotypus ♀ des. by Kimsey (1986)
Original description Long. 6 millim. - Viridi-cyaneus, abdominis dorso aurato, emarginatura triangulari, ultimi segmenti lateribus unisinuatis. Capite confertim et mediocriter punctato; prothoracis et mesothoracis punctis laevibus ac diffusis; scutelli et postscutelli validis et confertis. Postscustello sub hemisphœrico-truncato. - Sainte-Baume, sur les hêtres, très-rare. Diffère de tous les autres Omalus par l'incision triangulaire de l'abdomen; s'éloigne en outre de l'auratus par sa ponctuation plus serrée et les côtés du 3e segment ventral unisinués; du punctulatus, par l'impression faciale remontant plus prés des ocelles; de l'œneus, par ses pro et mesonotum ponctués; des pusillus et minutus, par son abdomen d'un doré cuivreux non douteux; du cœruleus, par sa couleur et sa forme plus élancée; du Wesmaëli, par son corps plus court et son postécusson non conique.
Synonyms and subspecies  
Systematic notes  

Geographic distribution of Pseudomalus triangulifer (Abeille, 1877)

World distribution

Type locality France (St. Baume)
Kimsey & Bohart Palaearctic: Europe (France), Turkey
Linsenmaier Europe, Daghestan, Anatolia
Other Authors The Netherlands (Veenendaal, 2011)
Chorology European
Distribution notes  

Geographic distribution of Pseudomalus triangulifer (Abeille, 1877)

Italian distribution according to the Checklist of the species of the Italian Fauna

Macroregion North (N): South (S): Sicily (Si): Sardinia (Sa):

Italian distribution by Administrative Region (Personal evidences, Literature records and other sources)

Adm. Region Literature records FEI records Personal records
Piemonte|Piedmont Strumia, 2005;
Valle d Aosta|Aosta V. Rosa, 2002c, 2005a, 2006a;
Lombardia|Lombardy Rosa, 2002a, 2002b;
Trentino Alto Adige Rosa, 2005a;
Friuli V.G. 24.5.2005 - ITALIA - Friuli Venezia Giulia - TS, Prosecco, leg.F. Sandel
Liguria Invrea, 1921 (as Ellampus auratus triangulifer; on Inula viscosa Ait. and Lavatera arborea L. infested by aphids, on leaves of Ceratonia siliqua L., on flowers of Euphorbia cyparissias L. and of Rubus);
Emilia Romagna Rosa, 2006b;
Toscana|Tuscany Strumia, 2005;
Umbria Rosa, 2005a;
Marche 12.IV.2012 - ITALIA - Marche - AN, Ancona, leg.G. Giovagnoli
Calabria Gribodo, 1881 (as Omalus auratus triangulifer); Rosa, 2005a; Strumia, 2005;
Sicilia|Sicily Erlandsson, 1972 (as Omalus);
Sardegna|Sardinia Erlansson, 1972; Strumia, 2005;
Distribution notes

Biology of Pseudomalus triangulifer (Abeille, 1877)

Known Hosts

Sphecidae Rhopalum tibiale, Ectemnius planifrons (Berland & Bernard, 1938), Pemphredon lugubris (Valkeila, 1971), Pemphredon lethifer, P. rugifer in galls of Andricus kollari (Har.) (Strumia, 1996); from artificial nests of Pemphredon lugens and of Passaloecus insignus provisioned with Homoptera Lachnidae (Veenendaal, 2011)
Notes on Hosts

Known Habitat

Plants for rest/refuge Inula viscosa Ait. and Lavatera arborea L. infested by aphids, leaves of Ceratonia siliqua L., flowers of Euphorbia cyparissias L., Rubus (Invrea, 1922), flowers of Euphorbia (Schmidt, 1977)
Biological notes Because Pseudomalus females have never been observed at the nest entrances of their hosts, the suggestion is that Pseudomalus species place their eggs on the body of aphids before they are collected by Pemphredoninae (Veenendaal, 2011)

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For citation purposes

Agnoli G.L. & Rosa P. (2020) Pseudomalus triangulifer (Abeille, 1877), in: website. Interim version 12 July 2020, URL: