Myrsidea waterstoni Valim, Price & Johnson, n. sp.
Creators: name: Valim, Michel P.
name: Price, Roger D.
name: Johnson, Kevin P.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Phthiraptera
Menoponidae
Myrsidea
Myrsidea waterstoni

description: Myrsidea waterstoni Valim, Price & Johnson n. sp.
(Figs. 13–14, 20, 24–25)
Type host. Anabacerthia variegaticeps (Sclater, 1857) —the Scaly-throated Foliage-gleaner (Furnariidae).
Female (n = 1). Habitus as in Fig. 24. Hypopharynx fully developed, DHS10, 0.07 long; DHS11, 0.11 long. Gula with 4 setae on each side. Metanotum with 10 setae on posterior margin. Setae of femoral brush, 11–14. Metanotum and abdomen as in Fig. 13. Tergite I enlarged with medioposterior convexity resulting in distortion of tergites II–V. Tergite III with slender posterior detached plate bearing its medial postero-tergal pair of setae, and compressing tergites IV-V medially. Tergites VI–VIII unmodified and of similar size. With conspicuous median gap in each tergal setal row. Tergal setae: I, 14; II, 15; III, 12; IV, 13; V, 14; VI, 11; VII–VIII, 8. Postspiracular setae shortest (0.11–0.21) on III, V and VI, and extremely long (0.34–0.44) on I, II, IV, VII and VIII. Sternal setae: II, each aster of 5 setae, posterior margin with 14 and anteriorly with 10; III, 27; IV, 35; V, 28; VI, 24; VII, 16; VIII– IX with 6 marginal and 6 anterior setae. Each pleurite III–VII with about 5–6 short marginal setae. Anus with 34 ventral fringe setae, 31 dorsal. Dimensions: TW, 0.49; HL, 0.35; PW, 0.29; PSPL, 0.11; MW, 0.46; MSPL, 0.14; AWIV, 0.58; ANW, 0.22; TL, 1.51.
Male (n = 1). Habitus as in Fig. 25. Gula with 3 setae on each side. Metanotum with 10 setae on posterior margin, metasternal plate with 5 setae, as in Fig. 5. Setae of femoral brush, 13. Metanotum and abdomen as in Fig. 14. Tergal setae: I, 13; II, 14; III, 16; IV–V, 15; VI, 13; VII–VIII, 8. Conspicuous median gap in each tergal setal row. Postspiracular setae as for female. Sternal setae: II, each aster of 5 setae, posterior margin with 15 and anteriorly with 10; III, 21; IV–V, 31; VI, 24; VII, 14; VIII, 4. Genital sac sclerite similar to that of M. ochrolaemi, much as in Fig. 12. Dimensions: TW, 0.47; HL, 0.33; PW, 0.31; PSPL, 0.11; MW, 0.41; MSPL, 0.14; AWIV, 0.52; GL, 0.44; GSL, 0.07; TL, 1.41.
Type material. Female holotype (DNA voucher Mysp.Anvar.5.1.2006.4), ex Anabacerthia variegaticeps, JMD 780 FMNH # 410612, Panama: Fortuna, 25 February 2006, K.P. Johnson coll. Paratype: 1 male, same data as holotype.
Remarks. The female of M. waterstoni n. sp. can be easily distinguished from other species of Myrsidea found on furnariids (e.g. M. strobilisternata, M. calvi Sychra, 2007, and M. ochrolaemi) by the presence of a detached plate on tergite III. In the male, the most distinctive morphological character is the chaetotaxy of tergites VII–VIII (see Figs. 15–17).
Etymology. This species is named after James Waterston (1879–1930), in honor of his description of the genus Myrsidea.
description: Published as part of Valim, Michel P., Price, Roger D. & Johnson, Kevin P., 2011, New host records and descriptions of five new species of Myrsidea Waterston, 1915 (Phthiraptera: Menoponidae) from passerine birds (Aves: Passeriformes), pp. 1-19 in Zootaxa 3097 on pages 7-8, DOI: 10.5281/zenodo.202624