Afrozavrelia Harrison

Description

Introduction

Small in straight, portable cases consisting mainly of diatom frustules and detritus.

Antenna

Antenna 5 segmented, long, 86% of head capsule length, on prominent pedestal, AR about 0.6, long basal segment with ring organ near base and seta subterminally, blade shorter that segment 2, accessory blade present, Lauterborn organs large, terminal on segment 2, sessile, style present.

Labrum

SI palmate, bases fused, SII plumose on tall pedestal, SIII and IV seta-like, labral lamella well-developed, pecten epipharyngis consisting of 3 separate, slender distally pointed scales; premandible with 2 teeth and well-formed brush.

Mandible

Mandible: dorsal tooth with 3 inner teeth, seta subdentalis long and curved, seta interna small and plumose, pecten mandibularis consisting of about 10 long lamellae.

Mentum

Median tooth rounded, six lateral teeth, second shorter then the first and third, ventromental plates fan-shaped, widely separated.

Body

Anterior and posterior parapods with simple hooks, procercus with long anal and lateral setae.

Notes

Keys

TABLE

Ecological Notes

Distributed in flowing waters in Kribi (Cameroon) and Western Cape Province, South Africa (Molenaars River, 33.43 S, 19.10E), Eerste River (33.56’ S, 19.10’E) (Harrison, 2004a), plus Great Berg River, Driefontein, Franschoek Forest Reserve, to Zimbabwe (Chimanimani National Park) (S. African Chironomidae website) plus Rondegaat Rivier (Cederbergs) (Cranston, Ekrem pers. obs.). South African specimens were found in mountain rivers with soft, unbuffered water.

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