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In Polynesia (Wilson and Taylor 1967)

Prionopelta kraepelini Forel, 1905, Mitt. Mus. Hamburg 22: 3, worker, queen. DISTRIBUTION: SAMOA: Upolu: Apia, winged greens, 31.111.1962 (RWT acc. 2305); 4.IV.1962 (GE acc. 27). Vaivase, winged queens, 8.111.1962; 27.111.1962 (W. Lidgard). These 4 series, collected at light, compare well with queens in the MCZ collection from the Philippines. They are somewhat larger (HW 0.45 vs. 0.40 mm in the single measurable Philippine specimen) but are still easily distinguishable from the much larger (HW ca. 0.65 mm) species majuscula Emery of New Guinea. P. kraepelini is very close to P. opaca Emery of New Guinea and Micronesia; indeed the two may be synonymous (Brown Fig. 4. Prionopelta kraepelini Forel, worker from Micronesia. 1960: 220). Kraepelini is distinguished by its weakly sculptured and partly shining body surface; opaca is densely, coarsely punctate and almost completely opaque. The genus Prionopelta was previously unknown from the Pacific E of New Guinea and Micronesia. Moreover, P. kraepelini is evidently abundant on certain islands in Micronesia, but has never been collected on New Guinea. Its distribution is thus peripheral to that of opaca. These considerations, plus the fact that P. kraepelini is known only from a limited area in the environs of Apia, lead us to conjecture that it has been introduced into Samoa in recent times by human commerce.

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