Anaticola crassicornis
Creators: name: Naz, Saima
name: Rizvi, Syed Anser
name: Sychra, Oldrich
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Psocodea
Philopteridae
Anaticola
Anaticola crassicornis

description: Anaticola crassicornis (Scopoli, 1763)
Figs. 1–6
Pediculus crassicornis Scopoli, 1763. Pediculus anatis Fabricius, 1798. Lipeurus squalidus Nitzsch, 1818; Giebel, 1874; Piaget, 1880. Lipeurus rubromaculatus Rudow, 1870. Lipeurus constrictus Kellogg, 1896. Esthinopterum crassicorne Harrison, 1916.
Description. Body elongated, narrow, slightly convex at lateral margins (Figs. 1, 2).
Head non-circumfaciate, elongate, triangular, narrow anteriorly at preantennal region and wide at postantennal region, temples rounded and smooth, flat dorso-ventrally, prognathous and with lateral hyaline margins.
In preantennal region, anterior head margin narrow, clypeal region narrow; hyaline margin present and evident; marginal carina broken laterally, smooth; premarginal carina reduced, discontinuous, separated from postmarginal carina, furnished with 6 pairs of antero-lateral marginal setae, one pair spine like; marginal carinal nodus absent; dorsal carina absent; ventral carina complete band around oral fossa (pulvinus); transverse carina absent; preantennal nodus small, reduced; conus pointed, smaller than scape in both sexes; trabecula absent; clypeus with characteristic chaetotaxy, 2 short dorsal setae above pulvinus; dorsal anterior plate present, separated from other sclerotization of anterior head by preantennal suture; ventral anterior plate absent; dorsal preantennal suture complete and touching the ends of premarginal carina; pulvinus complete, lobe like, large, slightly depressed anteriorly, fused with ventral carina; torma present.
Antennae heteromorphic, long, filiform, exposed, extending posteriorly; scape of male elongate, slender, without lateral process, with few lateral setae; pedicel small, rectangular, not fused with flagellomeres; flagellomere I different in shape from flagellomeres II and III, with lateral extended process; female segments monomorphic, all equal and similar; flagellomere III with sensitive structures, plate sensilla on lateral to ventral side and sensilla trichoidea on distal end; antennal socket shallow.
Postantennal region with gular plate present, fused laterally and posteriorly, anterior margin smooth and rounded; temporal margin smooth and rounded, marginal temporal carina complete, thin at posterior, thick at postocular region; 5 marginal temporal setae, of which 1, 4 and 5 with microsetae, 2 spine-like, 3 longest, but not reaching end of prothorax; 1 pair of post-temporal microsetae; postocular setae thorn-like, microsetae behind lens; ocular setae thorn-like, microsetae situated on lens; postocular nodus absent; occipital carina absent, occipital nodus not developed.
Thorax divided into two visible segments (prothorax and pterothorax). Prothorax small, roughly rectangular, ventrally articulated to occipital margin of head; anterior setae not seen; postero-lateral setae 1+1, normal; rhombic sclerite cup-shaped. Pterothorax elongate, rectangular, lateral margins slightly concave, smoothly parallel; 4 pairs of posterior macrosetae (2,2+2,2) between lateral setae, macrosetae large; posterior margin straight, smooth, on ventral side weakly V-shaped; trichoid setae present, thorn-like setae present; mesothoracic spiracles pleuro-ventral in position with large atrium; proepimeron expanded, unfused, developed posteriorly towards abdomen; meso-metasternal plate present; meso-metasternal setae minute, 2 pairs as 1,1+1,1; mesofurcal pit absent.
Thoracic legs II and III pleuro-coxal in articulation, elongate, simple; coxa and trochanter small; femur and tibia gradually elongated from leg I to III; tarsus 1-segmented, bearing two strong, curved, pointed claws and three hyaline spines.
Abdomen elongate, slender, lateral margins straight in male and slightly concave in female, size large in female, tapering towards posterior; segments of equal size except segments II and XI; medio-tergal division present in segment II; submedian to median setae on segments III–VIII absent; latero-posterior setae on segments II and III absent; segments IV and V with 2 pairs, segment VIII with 3 pairs; 1 pair of sternal setae as 1+1 on segments III–VII; 6 pairs of abdominal spiracles with small atria; tergites and sternites weakly sclerotized, pleurites deeply sclerotized to form strong lateral margin; pleural abdominal ribs enlarged; lateral trichoid setae on segment VIII present.
Dorsal plate on terminal segments divided into anterior fused segments IX and X and posterior segment XI (Fig. 4), anterior plate limited to tergo-pleurites, tergite XI not fused, bearing 2 pairs of long macrosetae latero-posteriorly between junction of fused segments X and XI; female genitalia comprised of a bilobed vulval sclerite bearing a row of small setae on vulval margin (Fig. 5), situated between segments VIII and IX on ventral side; genital opening vertical, ventro-terminal in position; genital plate weakly sclerotized.
Male genitalia (Fig. 6) reaching to segment VI, simple (Figs. 4, 6); basal apodeme of medium width, moderately sclerotized, slender, elongate, straight; paramere short, tube-like, fused anteriorly with lateral mesosomal plate; penis elongated, narrow, tubular, bifid anteriorly, Y-shaped, thickly sclerotized, situated between the mesosomal sclerites; endomeral plate thin and tapering posteriorly into two pointed ends.
Measurements (in mm). Male (n = 5): total length (TL): 3.2 (3.1–3.3); head length in midline (HL): 0.72 (0.7–0.75); preantennal width (PAW): 0.34 (0.33–0.35); temporal width (TW): 0.46 (0.45–0.47 mm); pronotal length (PL): 0.19 (0.18–0.2); pronotal width (PW): 0.35 (0.3–0.4); pteronotal length (PtL): 0.485 (0.48–0.49); pteronotal width (PtW): 0.48 (0.475 –0.485); abdominal length in mid line of dorsal side (AL): 1.80 (1.75– 1.85); genitalia length (GL): 0.65 (0.63–0.67); genitalia width at parameres (GW): 0.105 (0.09–0.12); length of parameres (PML): 0.17 (0.15–0.19). Female (n = 5): TL: 3.65 (3.6–3.7); HL: 0.765 (0.76–0.77); PAW: 0.36 (0.34–0.38); TW: 0.47 (0.45–0.49); PL: 0.22 (0.21–0.23); PW: 0.37 (0.36–0.38); PtL: 0.52 (0.51–0.53); PtW: 0.58 (0.56–0.6); AL: 2.39 (2.37–2.41).
Material examined. Four males, 10 females from A. indicus; 3 males, 8 females from A. albifrons; 9 males, 12 females from A. anser, Aug. 2005 to Aug. 2007, Pakistan: Karachi, Thatta, leg. S. A. Rizvi and S. Naz.
1 According to Clay & Hopkins (1951). 2 According to Zlotorzycka (1980).
Remarks. Anaticola crassicornis closely resembles A. anseris in having an elongate body with dark brown lateral margins, and the two species have similar head chaetotaxy, a temporal margin, pterothoracic characters, and abdominal chaetotaxy. Anaticola crassicornis can easily be differentiated from A. anseris, however, by clypeal features, body size, pterothoracic lateral margins, and male genitalia (Table 2).
description: Published as part of Naz, Saima, Rizvi, Syed Anser & Sychra, Oldrich, 2010, Anaticola crassicornis (Phthiraptera: Ischnocera: Philopteridae) on wild geese from Pakistan, pp. 60-66 in Zootaxa 2659 (1) on pages 61-65, DOI: 10.11646/zootaxa.2659.1.3, http://zenodo.org/record/5302166