Apobaetis Day 1955
Creators: name: Cruz, Paulo Vilela
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Baetidae
Apobaetis

description: Key to the identification of the larvae of the Apobaetis species described to date
(adapted from Nieto 2006 and Cruz & De-Souza 2014)
1. Third segment of labial palp completely triangular (Figs 12, 25 and 37 in Nieto 2006), with only one apical corner; distal margin of labrum near midline without blunt setae (Figs 6B, 19 and 31 in Nieto 2006)..................................... 2
1’. Third segment of labial palp subtriangular or subquadrangular, with two lateral corners (Figs 2F, 4F and 6F); distal margin of labrum near midline with blunt setae (Figs 2A, 4A and 6A).................................................... 5
2. Segment II of labial palp with strongly rounded distomedial projection (Fig. 5 in McCafferty 2000); segment II of maxillary palp robust and thick (Fig. 4 in McCafferty 2000)........................................ A. lakota [North America]
2’. Segment II of labial palp without strongly rounded distomedial projection (Figs 2F, 4F and 6F); segment II of maxillary palp robust and thin (Figs 2E, 4E and 6E)...................................................................... 3
3. Maxillary palp long, at least 1.5× length of galea-lacinia (Fig. 35 in Nieto 2006); dorsal margin of femora with blunt setae (Fig. 38 in Nieto 2006)...................................................................... A. niger Nieto 2006
3’. Maxillary palp shorter, subequal to galea-lacinia (Fig. 23 in Nieto 2006); dorsal margin of femora without blunt setae (Fig. 26 in Nieto 2006)........................................................................................ 4
4. Labrum with pronounced medial emargination (Fig. 6a in Nieto 2006); segment II of labial palp with distomedial projection, rounded apically (Fig. 12 in Nieto 2006)................................................. A. insolitus Nieto 2006
4’. Labrum with shallow medial emargination (Fig. 19 in Nieto 2006); segment II of labial palp with distomedial projection pointed apically (Fig. 25 in Nieto 2006)................................................ A. kallawaya Nieto 2006
5. Tarsal claws longer than tarsi (Figs 10A and 22 in Cruz & De-Souza 2014).........................................6
5’. Tarsal claws shorter than tarsi (Figs 3A, 5A and 7A).......................................................... 8
6. Segment III of labial palp subquadrangular (Figs 2F, 4F and 6F); abdominal tergum V with lateral mark................ 7
6’. Segment III of labial palp subtriangular (Fig. 16 in Cruz et al. 2011); abdominal tergum V with medial mark................................................................................ A. hamadae Cruz, Boldrini & Salles 2011
7. Segment II of maxillary palp without constriction (Fig. 7 in Cruz & De-Souza 2014); segment II of labial palp with straight distomedial projection (Fig. 9 in Cruz & De-Souza 2014); paraproct with four marginal spines (Fig. 12 in Cruz & De-Souza 2014)................................................................... A. kethepiali Cruz & De-Souza 2014
7’. Segment II of maxillary palp with constriction (Fig. 19 in Cruz & De-Souza 2014); segment II of labial palp with pointed distomedial projection (Fig. 21 in Cruz & De-Souza 2014); paraproct with one pointed marginal spine (Fig. 24 in Cruz & De-Souza 2014)........................................................................................ A. pucupi
8. Segment II of maxillary palp without apical constriction (Figs 4F and 6E)........................................ 9
8’. Segment II of maxillary palp with apical constriction (Fig. 2E)............................ A. etowah [North America]
9. Labrum, distal margin with short and blunt setae near midline (Fig. 6A); maxillary palp long, 1.28× length of galea-lacinia (Fig. 6E); abdominal tergum V has a single lateral dark mark (Fig. 1C)........................................ A. signifer
9’. Labrum, distal margin with elongated and blunt setae near midline (Fig. 4A); maxillary palp long, 1.5× length of galea-lacinia (Fig. 4E); abdominal terga II, III, V, VI and IX are darker (Fig. 1A)........................................ A. fiuzai
description: Published as part of Cruz, Paulo Vilela, 2020, Redescription of three species of Apobaetis Day, 1955 (Ephemeroptera: Baetidae), pp. 317-330 in Zootaxa 4808 (2) on pages 328-329, DOI: 10.11646/zootaxa.4808.2.5, http://zenodo.org/record/3933560