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A new species of Ceraeochrysa Adams (Neuroptera, Chrysopidae), with a key to the species from Mexico.

ABSTRACT: The genus Ceraeochrysa Adams is widely distributed in the New World, from southeastern Canada to Argentina, with 15 out of 61 previously known species recorded in Mexico. In this paper, Ceraeochrysa tacanensis sp. nov. is described and illustrated from Volcán Tacaná, Chiapas, and an identification key to Ceraeochrysa species present in Mexico is provided. The new species is similar to others with swollen and darkened posterior branches of the cubital vein, and it can be separated from these other species by an elongate gonapsis extending from the base of the gonosaccus; the gonapsis is slightly upturned, terminating in a rounded apex with dorsal microteeth. Females of the new species have non-distinctive genitalia morphology. However, they can be associated with males of the species by body color pattern, synchrony, and sympatry.

SUBMITTER: Cancino-Lopez RJ

PROVIDER: S-EPMC6861335 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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A new species of Ceraeochrysa Adams (Neuroptera, Chrysopidae), with a key to the species from Mexico.

Cancino-López Rodolfo J RJ Contreras-Ramos Atilano A

ZooKeys 20191111

The genus Ceraeochrysa Adams is widely distributed in the New World, from southeastern Canada to Argentina, with 15 out of 61 previously known species recorded in Mexico. In this paper, Ceraeochrysa tacanensis sp. nov. is described and illustrated from Volcán Tacaná, Chiapas, and an identification key to Ceraeochrysa species present in Mexico is provided. The new species is similar to others with swollen and darkened posterior branches of the cubital vein, and it can ...[more]

PMID: 31754321

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Project description:Green lacewings (Neuroptera: Chrysopidae) are voracious predators of aphids and other small, soft-bodied insects and mites. Earlier, we identified (1R,2S,5R,8R)-iridodial from wild males of the goldeneyed lacewing, Chrysopa oculata Say, which is released from thousands of microscopic dermal glands on the abdominal sterna. Iridodial-baited traps attract C. oculata and other Chrysopa spp. males into traps, while females come to the vicinity of, but do not usually enter traps. Despite their healthy appearance and normal fertility, laboratory-reared C. oculata males do not produce iridodial. Surprisingly, goldeneyed lacewing males caught alive in iridodial-baited traps attempt to eat the lure and, in Asia, males of other Chrysopa species reportedly eat the native plant, Actinidia polygama (Siebold & Zucc.) Maxim. (Actinidiaceae) to obtain the monoterpenoid, neomatatabiol. These observations suggest that Chrysopa males must sequester exogenous natural iridoids in order to produce iridodial; we investigated this phenomenon in laboratory feeding studies. Lacewing adult males fed various monoterpenes reduced carbonyls to alcohols and saturated double bonds, but did not convert these compounds to iridodial. Only males fed the common aphid sex pheromone component, (1R,4aS,7S,7aR)-nepetalactol, produced (1R,2S,5R,8R)-iridodial. Furthermore, although C. oculata males fed the second common aphid sex pheromone component, (4aS,7S,7aR)-nepetalactone, did not produce iridodial, they did convert ∼75% of this compound to the corresponding dihydronepetalactone, and wild C. oculata males collected in early spring contained traces of this dihydronepetalactone. These findings are consistent with the hypothesis that Chrysopa males feed on oviparae (the late-season pheromone producing stage of aphids) to obtain nepetalactol as a precursor to iridodial. In the spring, however, wild C. oculata males produce less iridodial than do males collected later in the season. Therefore, we further hypothesize that Asian Chrysopa eat A. polygama to obtain iridoid precursors in order to make their pheromone, and that other iridoid-producing plants elsewhere in the world must be similarly usurped by male Chrysopa species to sequester pheromone precursors.

Dataset Information

A new species of Ceraeochrysa Adams (Neuroptera, Chrysopidae), with a key to the species from Mexico.

Publications

A new species of <i>Ceraeochrysa</i> Adams (Neuroptera, Chrysopidae), with a key to the species from Mexico.

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