Calliephialtes grapholithae

(Cresson, 1890)

Calliephialtes grapholithae is an that primarily parasitizes concealed lepidopteran . Its most extensively documented is Cydia caryana (), a of pecan orchards in Mexico and the southern United States. The has been recorded from pecan-growing regions in Coahuila and Tamaulipas, Mexico, and from Kansas, USA. A potential additional host association involves Chalcoela iphitalis (Crambidae), a whose larvae on larvae within nests; this relationship requires independent confirmation.

Ichneumon Wasp - Flickr - treegrow (7) by Katja Schulz from Washington, D. C., USA. Used under a CC BY 2.0 license.

Ichneumon Wasp - Flickr - treegrow (8) by Katja Schulz from Washington, D. C., USA. Used under a CC BY 2.0 license.

Ichneumon Wasp - Flickr - treegrow (4) by Katja Schulz from Washington, D. C., USA. Used under a CC BY 2.0 license.

Pronunciation

How to pronounce Calliephialtes grapholithae: /kæl.iːˈfaɪ.æl.tiːz ˌɡræf.əˈlɪθ.i.aɪ/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

are with typical characteristics: slender body, long , and a visible in females. Males are smaller than females. Accurate identification to level requires examination of , propodeal structure, and other morphological details; consultation of for North is necessary. Distinguished from other Calliephialtes species by genitalic and characteristics detailed in taxonomic revisions.

Images

Habitat

Associated with agroecosystems containing pecan (Carya illinoinensis) orchards in northern Mexico and the southern United States. In Mexico, shows higher abundance at -high altitudes (1,470–1,600 m) in localities such as Saltillo, General Cepeda, and Parras de la Fuente (Coahuila). Absent from lower elevation sites (1,110 m) with intensive use in adjacent . Also recorded from (Polistes metricus) nests in Kansas, USA, though this association appears indirect via a lepidopteran intermediate .

Distribution

Mexico: Coahuila (Saltillo, General Cepeda, Parras de la Fuente, Torreón—absent), Tamaulipas (Jaumave). United States: Kansas (Leavenworth), Hawaii (presence recorded in GBIF). range corresponds to pecan distribution in northern Mexico and southern United States.

Seasonality

observed in mid-November in Kansas, USA. Activity in Mexican pecan orchards documented during 2019–2020 field seasons, with emergence from incubated pecan husks collected during the growing season.

Host Associations

Cydia caryana - primary Larval ; emerged from damaged pecan husks (rueznos) in laboratory incubation. Confirmed by multiple rearing studies in Mexico.
Chalcoela iphitalis - probable Proposed based on single rearing event from Polistes metricus nest in Kansas; on larvae within nests. Requires independent confirmation before unequivocal acceptance.
Acrobasis betulella - reported Previously recorded in literature; : Phycitinae.
Acrobasis juglandis - reported Previously recorded in literature; : Phycitinae.
Acrobasis rubrifasciella - reported Previously recorded in literature as A. nibrifasciella; : Phycitinae.
Carmenta texana - reported Previously recorded in literature; : Sesiinae.
Meskea dyspteraria - reported Previously recorded in literature; : Siculodinae.
Periploca ceanothiella - reported Previously recorded in literature as Stagmatophora ceanothiella; Cosmopterigidae: Chrysopeleiinae.
Thyridopteryx ephemeraeformis - reported Previously recorded in literature; : Oiketicinae ( ).
Megalopyge opercularis - reported Previously recorded in literature; (evergreen ).

Behavior

females locate concealed lepidopteran within tissues or protective structures (pecan husks, cases) and oviposit using a long . Laboratory rearing from pecan husks involves incubation of damaged fruits in controlled conditions to obtain adult . The mechanism by which females might access within defended nests remains undescribed.

Ecological Role

agent of lepidopteran pests, particularly Cydia caryana in pecan agroecosystems. Contributes to diversity in agricultural landscapes. Absence from sites with intensive use suggests sensitivity to chemical management practices, with implications for strategies.

Human Relevance

Of interest for of Cydia caryana, an economically significant pest of pecan production. Laboratory rearing protocols have been developed to maintain using artificial diets for the . Potential for in pecan orchards, particularly at higher elevations where chemical pressure is reduced.

Similar Taxa

Phanerotoma fasciataCo-occurring of Cydia caryana in Mexican pecan orchards; distinguished by -level characters ( vs. Braconidae), including presence of areolet in and different antennal structure.
Eupelmus sp.Co-emergent from pecan husks in Tamaulipas; distinguished by characters (: compact body, metallic coloration, reduced ). Status as or of C. caryana unconfirmed.

More Details

Host specificity pattern

Known share ecological trait of 'concealed' larval stages—within pecan husks, cases, or nests. This pattern suggests specialized foraging for hosts in protected microhabitats rather than exposed foliage-feeding .

Altitudinal distribution factors

Higher abundance at 1,470–1,600 m versus absence at 1,110 m in Coahuila correlates with reduced use in adjacent (cotton) at higher elevations, though direct causal link requires experimental verification.

Taxonomic note

Original description by Cresson (1890). Spelling variants in literature include 'Calliephiates' (erroneous) in some Mexican publications.