Ceroptres cerri Mayr, 1872

Lobato-Vila, Irene & Pujade-Villar, Juli, 2019, Revision of world Ceroptresini (Hymenoptera: Cynipidae) with the description of a new genus and five new species, Zootaxa 4685 (1), pp. 1-67 : 21-22

Ceroptres cerri Mayr, 1872

( Figures 3b ; 5c, d ; 11 a–c)

Ceroptres cerri Mayr, 1872 . Ver. Zool. Bot. Ges. Wien 22: 725. Type material: NMW [examined by the second author in Pujade- Villar & Nieves-Aldrey (1993)].

Ceroptres cerriphilus Giraud, 1911 . Giraud in Houard, 1911. Nouv. Arch. Muséum 5(3): 313. Type material: MNHNP [examined by the second author in Pujade-Villar & Nieves-Aldrey (1993)]. Synonymized by Pujade-Villar & Nieves-Aldrey (1993: 58).

Ceroptres vitripennis Giraud, 1911 . Giraud in Houard, 1911. Nouv. Arch. Muséum 5(3): 314. Type material: MNHNP [examined by the second author in Pujade-Villar & Nieves-Aldrey (1993)]. Synonymized by Pujade-Villar & Nieves-Aldrey (1993: 58).

Additional material (examined) (17♀). Material collected in Catalonia and deposited in UB with the following labels: ‘Blanes ( GI, Cat.), Ex. P. suberi , Q. suber (arbre MD2), (08.05.2003) V-2003 ’ (1♀); same data, (15.05.03) V-2003: 4♀ ; same data, (22.05.2003) V-2003: 1♀ ; same data, (10.VII.2003) II.2004: 1♀ ; same data, (17.VII.2003) II.2004: 2♀ ; same data, (17.VII.2003) 28.VII.03: 3♀ ; same data, (25.VII.2003) 30.VII.03: 1♀ ; ‘ Caldes de Mala- vella ( BCN, Catalunya), Ex. Q. suber , (29.04.03) V-2003 ’ (4♀) .

Diagnosis. This species can be easily separated from the rest of Ceroptres by having the mesopleuron anteriorly conspicuously striated ( Fig. 11b ), rarely with weakly impressed striae (mesopleuron smooth, shiny and without striae in the rest of species; in C. ensiger ( Walsh, 1864) , the mesopleuron has an alutaceous sculpture anteriorly ( Fig. 6d , see below).

Brief redescription. Apart from the mesopleural sculpture, Ceroptres cerri is also characterized by having females with 12-segmented antennae (15-segmented in males), subclavate (filiform in males) and with the first segments usually dark ( Figs 3b ; 5c, d ); vertical carinae on the lower face weak and incomplete, short, running just a little from inner ventral margin of the toruli and delimiting a small depressed area ( Fig. 11a ); mesoscutum strongly coriaceous with weak discontinuous transversal elements ( Fig. 5d ); notauli almost complete, but faint in the anterior 1/3 or 1/4; median groove visible in the posterior 1/3 of the mesoscutum, but shallow; mesoscutellum densely, but weakly wrinkled, interspaces finely coriaceous; third metasomal tergum with a weak posterodorsal patch of micropunctures; prominent part of the hypopygial spine usually about 3.0 times as long as wide ( Figs 5c ; 11c ); radial cell about 2.5 times as long as wide; body mainly black ( Figs 3b ; 5c, d ). For more details on the morphology of this species, see Pujade-Villar & Nieves-Aldrey (1993) and Melika (2006).

Distribution. Probably throughout Western Palearctic ( Melika 2006). Known from Andorra, Austria, France, Hungary, Jordan, Poland, Portugal and Spain according to Askew et al. (2013).

Biology. According to Askew et al. (2013), this species is associated with galls of Andricus , Aphelonyx , Cerroneuroterus , Chilaspis , Dryocosmus , Plagiotrochus , Pseudoneuroterus and Synophrus . It has also been recorded from galls of Callirhytis rufescens (Mayr, 1882) (sexual form), Cynips quercus (Fourcroy, 1785) (asexual form), Neuroterus quercusbaccarum (Linnaeus, 1758) (sexual form) and Trigonaspis synaspis (Hartig, 1841) (asexual form); however, these records need to be confirmed since the galls are found in oaks belonging to the Quercus section . Ceroptres cerri has been obtained from galls on oaks belonging to Cerris section: Q. cerris L., Q. coccifera L., Q. ilex L., Q. ithaburensis Decne. and Q. suber L. according to Askew et al. (2013), as well as from other Circum- Mediterranean Quercus of the same section.

Remarks. Ceroptres cerri was redescribed in Pujade-Villar & Nieves-Aldrey (1993: 62), who also provided some notes on the morphology of males.

Figures

FIGURE 3. Female faces of valid species of Ceroptres: a) C. catesbaei (type); b) C. cerri; c) C. clavicornis; d) C. confertus (type); e) C. cornigera (type); f) detail of the median ridge in the lower face of C. cornigera; g) head of C. cornigera in dorsal view; h) C. ensiger; i) C. frondosae (type); j) detail of the median ridge in the lower face of C. frondosae; k) head of C. frondosae in dorsal view.

FIGURE 5. a) Ceroptres catesbaei lateral and b) dorsal habitus (type); c) C. cerri lateral and d) dorsal habitus; e) C. clavicornis lateral and f) dorsal habitus; g) C. confertus lateral and h) dorsal habitus (type).

FIGURE 6. a) Ceroptres cornigera lateral and b) dorsal habitus (type); c) C. ensiger lateral habitus, d) detail of mesopleuron and e) dorsal habitus (type); f) C. frondosae lateral and g) dorsal habitus (type); h) head and mesosoma of C. kovalevi in lateral view, i) lateral metasoma and j) head and mesosoma in dorsal view (type).

FIGURE 11. Ceroptres cerri a) head in anterior view, b) mesosoma in lateral view and c) metasoma in lateral view; C. clavicornis d) head in anterior view, e) mesosoma in lateral view and f) metasoma in lateral view.