Conostigmus californicus ( Ashmead, 1893 )

Trietsch, Carolyn, Mikó, István, Ezray, Briana & Deans, Andrew R., 2020, A Taxonomic Revision of Nearctic Conostigmus (Hymenoptera: Ceraphronoidea: Megaspilidae), Zootaxa 4792 (1), pp. 1-155: 32-33

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Conostigmus californicus ( Ashmead, 1893 )


Conostigmus californicus ( Ashmead, 1893)  

Figs. 16 View FIGURE 16 , 17 View FIGURE 17

Species Comments and History. Ashmead (1893) described Megaspilus californicus   from a single male specimen, relying mostly on characters related to color, microsculpture and antennal ratios. Kieffer transferred the species from Megaspilus   to Conostigmus   (1909), then redescribed the species and keyed it out with other males from the Nearctic, again relying mainly on coloration, microsculpture and antennal characters (1914).

The male lectotype present at the USNM is in good condition, and bears the following characteristics: wings present and macropterous, postocellar furrow present, preoccipital furrow present, anterior end of the preoccipital furrow ending at the postocellar furrow, facial pit present, median process on the intertorular carina present and acute, rugose region on upper face present, and sternaulus present and elongate (exceeding 3/4 of mesopleuron length at the level of the sternaulus).

This species has a similar habitus to C. abdominalis   or C. pulchellus   , and it shares the elongate sternaulus, but it lacks the facial sulcus found in both of these species. While C. longiharpes   also resembles this species and lacks the facial sulcus, C. longiharpes   also lacks an elongate sternaulus and postocellar carina, both of which are present in C. californicus   .

Though C. californicus   does not appear to be the same as any other Nearctic Conostigmus   species that we are aware of, male genitalia characters would help to confirm whether this is a different species or just an odd specimen. Unfortunately, we were unable to dissect out the male genitalia of the type specimen or locate any other specimens for dissection. We consider Conostigmus californicus   as a species inquirenda.

Material Examined. Lectotype male: USA: California: USNMENT01339748 ( USNM).  


Smithsonian Institution, National Museum of Natural History