Tranosemella praerogator (Linnaeus, 1758)

Scaramozzino, Pier Luigi, Giovanni, Filippo Di, Loni, Augusto, Ricciardi, Renato & Lucchi, Andrea, 2018, Updated list of the insect parasitoids (Insecta, Hymenoptera) associated with Lobesiabotrana (Denis & Schiffermueller, 1775) (Lepidoptera, Tortricidae) in Italy. 2. Hymenoptera, Ichneumonidae,, ZooKeys 772, pp. 47-95: 47

publication ID

publication LSID

persistent identifier

treatment provided by

ZooKeys by Pensoft

scientific name

Tranosemella praerogator (Linnaeus, 1758)


Tranosemella praerogator (Linnaeus, 1758)  Figure 8

Tranosemella praerogator  : Dalla Montà et al. 1993; Marchesini and Dalla Montà 1994: 205, 1998: 3; Coscollá 1997: 215; Colombera et al. 2001: 94; Marchesini et al. 2006: 12; Marchesini 2007: 41, 48.

Italian distribution of reared parasitoids.

Veneto: Dalla Montà et al. 1993; Marchesini and Dalla Montà 1994, 1998; Marchesini et al. 2006; Marchesini 2007.

Piedmont: Colombera et al. 2001.


Holarctic widespread species (Iceland, Europe, Egypt, Central Russia and the Far East, Japan, Canada, United States) ( Yu et al. 2012). Its presence in India ( Morley 1913) has to be confirmed, since it is most probably based on a misidentification for a Tryphoninae  Ichneumonid species belonging to the genus Dyspetes  Förster, 1869 (see taxonomic notes).

Host range.

Yu et al. (2012) list 44 species of Lepidoptera  hosts, especially Tortricidae  (32 species), including various species of the genera Archips  , Argyrotaenia  , Choristoneura  and Pandemis  . The list reports also Plutellidae  , including P. xylostella  , Gelechiidae  as Pectinophora gossypiella  (Saunders, 1844), Yponomeutidae  , Sesiidae  , Pyralidae  , Arctiidae  , Geometridae  and Noctuidae  .

Ecological role.

In Italy, it has been reported on grapevine in Veneto and Piedmont. In Veneto ( Marchesini and Dalla Montà 1994) it was regularly obtained from EGVM larvae of first and second generation, with rates of parasitism higher than those of C. capitator  (Table 8). It has never been collected in the EGVM third generation, and it is supposed to overwinter on alternative hosts. In contrast, Colombera et al. (2001) found it in the first generation, with low levels of parasitization (lower than 1%), while C. capitator  showed a more important and incisive activity. In Veneto, the species was hyperparasitized by Elasmus steffani  Viggiani, 1967 ( Hymenoptera  Elasmidae  ), in turn attacked by Baryscapus nigroviolaceus  (Nees, 1834) ( Hymenoptera  Eulophidae  ) and by an unidentified Pteromalus  ( Hymenoptera  Pteromalidae  ) ( Marchesini and Dalla Montà 1994). Villemant et al. (2011) assert that in some viticultural areas of France, T. praerogator  mainly develops at the expense of S. pilleriana  , while in other areas it may develop even at the expense of EGVM, E. ambiguella  and Argyrotaenia ljungiana  (Thunberg, 1797) (= pulchellana Haworth, 1811).

Taxonomic notes.

As already mentioned by some authors ( Roman 1932, Yu and Horstmann 1997, Horstmann 2006), the name “praerogator” Linnaeus has been used in the past to indicate Dyspetes  Förster 1869 [ Dyspetes praerogator  Thomson, 1883 unavailable name for D. luteomarginatus  Habermehl, 1925] ( Ichneumonidae  Tryphoninae  ). Gravenhorst (1829) attributed the Linnean species to the genus Tryphon  , perhaps following the indication of Fabricius (1804), who assigned it to the genus Bassus  . Roman (1932), studying the types of Linnaeus, assigned the species to the genus Angitia  Holmgren, 1859, hypothesizing the synonymy with Angitia armillata  (Gravenhorst) [recte Diadegma armillata  (Gravenhorst, 1829)]. Horstmann (1973) initially assigned this species to the genus Diadegma  , while Townes (1971) included it in the related genus Tranosema  Förster, 1869. Later, Horstmann (1978) moved the species to the genus Tranosemella  Horstmann.