Myrsidea victoriae Soto Madrid & Sychra, 2020

Ramon, Madrid, Soto, Old, Sychra, rich, Benedick, Suzan, Edwards, David P., Efeykin, Boris D., Fandrem, Marte, Haugaasen, Torbjørn, Teterina, Anastasia, Tomassi, Suzanne & Tolstenkov, Oleg, 2020, Diversity and host associations of Myrsidea chewing lice (Phthiraptera: Menoponidae) in the tropical rainforest of Malaysian Borneo, International Journal for Parasitology: Parasites and Wildlife 13, pp. 231-247 : 240-242

3.1.11. Myrsidea victoriae Soto Madrid & Sychra , new species

( Fig. 5A–D , 7C–D ).

Type host. Turdinus sepiarius ( Horsfield, 1821) – Horsfield’ s Babbler ( Pellorneidae ).

Type locality. YSFMA in Sabah, MALAYSIA (4 ◦ 58 ′ N, 117 ◦ 4 ′ E) .

Type material. Holotype, ♀, MALAYSIA: YSFMA in Sabah (4 ◦ 58 ′ N, 117 ◦ 4 ′ E), ex Turdinus sepiarius , 15.viii.2014 (Marte Fandrem) ( MMBC) . Paratypes, 1♀, 16 with the same data as holotype .

Diagnosis. According to the male genital sclerite, the male of Myrsidea victoriae sp.n. is close to M. monilegeri Tandan (1972) that was described on the base of single male from Garrulax monileger fuscatus Baker (1918) ( Leiothrichidae ) from Thailand. Both males can be easily distihguished by (1) the form of hypopharynx (fully developed in M. victoriae sp.n. and considerably reduced in M. monilegeri ), (2) smaller number of tergal setae on segments I–III (4, 6, 8 on M. victoriae sp.n. and 7, 11, 13 on M. monilegeri ), and (3) absence of anterior setae on pleurites (these setae are present on M. monilegeri ). Except for the male genital sac

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sclerite Myrsidea victoriae sp.n. is morphologically very close to M. duplicata Tandan (1972) from Pomatorhinus schisticeps Hodgson (1836) ( Timaliidae ) from Thailand. Both sexes are well separated from those of M. duplicata by 1) smaller number of tergal setae on segments II–VIII (total number of setae, 63–65 vs. 87–90 in female; and 55 vs. 65–76 in male); 2) presence median gap in each row of tergal setae; and 3) smaller dimensions, especially TW (0.45–0.46 vs. 0.47–0.49 in female; and 0.40 vs. 0.45–0.46 in male).

Female (n = 2). As in Figs. 5A and 7C . Hypopharyngeal sclerites fully developed. Shape of head as in Fig. 5B . Length of DHS 10, 0.04–0.05; DHS 11, 0.10; ratio DHS 10/11, 0.42–0.48. Ls5, 0.06 long, latero-ventral fringe with 9 setae. Gula with 3 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. Prosternal plate with rounded anterior margin ( Fig. 5A ). First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Mesonotum divided. Metanotum not enlarged, with 8–10 marginal setae; metasternal plate with 6 setae; metapleurites with 2 short strong spiniform setae. Femur III with 14–16 setae in ventral setal brush. Tergites modified as follows: I enlarged with widely rounded posterior margin, II–VIII not enlarged and all with straight posterior margin ( Fig. 5A ). Abdominal segments with small median gap in each row of tergal setae. Tergal setae (postspiracular setae and on tergites II–VIII also short associated setae are not included): I, 4; II, 7–9; III, 7–10; IV, 11–13; V, 13–14; VI, 11; VII, 11; VIII, 7. Postspiracular setae very long on II, IV, VII and VIII (0.30–0.41); long on I and VI (0.24–0.28); and short on III and V (0.13–0.15). Inner posterior seta of last tergum longer than anal fringe

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setae with length 0.08; length of short lateral marginal seta of last segment, 0.04. Pleural setae: I, 4–5; II, 6–8; III, 6–8; IV, 7–8; V, 7–8; VI, 7–8; VII, 5–6; VIII, 3–4. Pleurites with only short spine-like setae. Pleurite VIII with inner setae (0.05–0.08) as long as outer (0.04–0.05). Anterior margin of sternal plate II without a medial notch. Sternal setae: I, 0; II, 4 in each aster, aster setae length: s1, 0.05–0.07; s2, 0.04; s3, 0.03; s4, 0.02–0.03; with 7 marginal setae between asters, 7 medioanterior; III, 14; IV, 26–28; V, 32–34; VI, 26–27; VII, 14–17; VIII–IX, 7–9; and 5–6 setae separated by large median gap into two groups of 2–3 setae on deeply serrated vulval margin with slight medioposterior concavity; sternites III–VII without medioanterior setae. Anal fringe formed by 30–31 dosral and 30–32 ventral setae.

Dimensions: TW, 0.45–0.46; POW, 0.32; HL, 0.28–0.29; PW, 0.28; MW, 0.43; AW, 0.56–0.57; ANW, 0.21; TL, 1.37–1.41.

Male (n = 1). As in Fig. 7D . Similar as female except as follows. Length of DHS 10, 0.05; DHS 11, 0.10; ratio DHS 10/11, 0.50. Ls5, 0.05 long, latero-ventral fringe with 10 setae. Metanotum not enlarged with 5 marginal setae (the most posterolateral setae are not counted); metasternal plate with 6 setae; metapleurites with 2 short spiniform strong setae. Femur III with 14 setae in ventral setal brush. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae (postspiracular setae and on tergites II–VIII also short associated setae are not included): I, 4; II, 6; III, 8; IV, 11; V, 10; VI, 10; VII, 10; VIII, 6. Postspiracular setae very long on II, IV, VII and VIII (0.30–0.40); long on I and VI (0.21–0.23); and short on III and V (0.11); Length of inner posterior seta of last tergum, 0.07; short lateral marginal seta of last segment, 0.02. Pleural setae: I, 4; II, 6–7; III, 6–7; IV, 7; V, 6; VI, 6; VII, 5; VIII, 3. Pleurites with only short spine-like setae. Pleurite VIII with inner setae (0.06–0.08) as long as outer (0.04–0.05). Anterior margin of sternal plate II without a medial notch ( Fig. 5C ). Sternal setae: I, 0; II, 4 in each aster, aster setae length: s1, 0.04–0.05; s2, 0.03–0.04; s3, 0.03; s4, 0.02–0.03; with 7 marginal setae between asters, 7 medioanterior; III, 8; IV, 22; V, 26; VI, 23; VII, 13; VIII, 3; remainder of plate, 12; and with 5 setae posteriorly; sternites III–VII without medioanterior setae. With 8 internal anal setae. Genital sac scleriteas in Fig. 5D .

Dimensions: TW, 0.40; POW, 0.29; HL, 0.27; PW, 0.25; MW, 0.34; AW, 0.45; GW, 0.11; GL, 0.42; ParL, 0.07; GSL, 0.06; TL, 1.16.

Etymology. This species epithet is name in honor of Victoria Soto Madrid, sister of the first author.

Figures

Fig. 5. Myrsidea victoriae sp.n. A–D, dorso-ventral view of female thorax and abdomen (A), head shape (B), male metasternal plate and sternites I–II (C), male genital sac sclerite (D); Myrsidea macronoi E, male genital sac sclerite.

Fig. 7. Habitus. Myrsidea ramoni sp.n. A-B, holotype female (A), paratype male (B). Myrsidea victoriae sp.n. C-D, holotype female (C), paratype male (D).