Pristaulacus montanus
(Cresson, 1879)
Pristaulacus montanus is a of aulacid in the Aulacidae. Aulacid wasps are of wood-boring , particularly () and (). The species occurs in North America, with records from Canada including British Columbia. Aulacids are often mistaken for ichneumon wasps due to their superficial resemblance, but can be distinguished by the high attachment of the on the and a downcurved tip.
Pronunciation
How to pronounce Pristaulacus montanus: /ˌprɪstɔːˈleɪkəs mɒnˈtɑːnəs/
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Identification
Aulacid including Pristaulacus montanus can be distinguished from ichneumon wasps by three characters: the attaches high on the back of the (not low); there is a short "neck" behind the ; and the is somewhat sinuous and downcurved at the tip rather than straight. Females possess a long, thin ovipositor used to wood crevices for . The hind have grooves on their inner surface that help guide and stabilize the ovipositor during insertion.
Habitat
Associated with cut or damaged wood where wood-boring are active, including logs, slash , and freshly-cut timber. The are attracted to aromatic compounds emitted by living cut wood that beetles exploit.
Distribution
North America; recorded from Canada (British Columbia). The Pristaulacus is broadly distributed across North America, though specific distribution details for P. montanus are limited.
Host Associations
- Wood-boring beetles - of () and () are known for aulacid generally; specific host records for P. montanus are not documented
Behavior
Females walk haltingly across logs, bobbing their slightly and slowly rowing their . They cracks and crevices by inserting their deeply, apparently locating through sensory . Upon finding a host, females use their to insert into wood-boring .
Ecological Role
of wood-boring , potentially helping regulate of forest pests including that damage timber.
Human Relevance
Aulacid are not known to humans and are considered for their role in controlling wood-boring . They may be encountered by loggers, foresters, and working with freshly-cut timber.
Similar Taxa
- IchneumonidaeSuperficially similar body plan with long , but distinguished by low abdominal attachment, straight ovipositor, and lack of 'neck'
- Pristaulacus fasciatusCongeneric with similar biology and appearance; P. fasciatus occurs from eastern Texas and Nebraska eastward and averages around 16 mm (females), 13 mm (males)
- AulacusOther in Aulacidae; typically smaller than Pristaulacus, with similar biology
More Details
Taxonomic note
The Aulacidae contains two and approximately 185 worldwide, with 32 species in North America. Aulacids are classified in the superfamily along with (Evaniidae) and carrot ().
Research needs
Specific biological details for P. montanus appear poorly documented in accessible literature. Most information on aulacid biology derives from studies of other Pristaulacus , particularly P. fasciatus and P. rufitarsis.