Macrostomorpha taxonomy and phylogeny

Abstract:

Paromalostomum coronum n. sp. from a high-energy beach at Reid State Park, Georgetown, Maine and from Manomet, Massachusetts is described. Distinguishing features are the accentuated coronal shape of the cuticular apparatus of the bursa, a distinctive penis-glandular stylet complex with an approximate 1:1 size ratio between the distal portion of the penis stylet and the glandular stylet and a penis stylet which has an end-hook and two asymmetric thickenings at both ends of its distal portion. P. coronum, always abundant during this study, is a voracious predator feeding on a variety of prey. Eggs are deposited throughout the year and the juveniles emerge after 12-35 days.

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