Altiverruca navicula ( Hoek, 1913 )

Chan, Benny K. K., Prabowo, Romanus Edy & Lee, Kwen-Shen, 2010, North West Pacific deep-sea barnacles (Cirripedia, Thoracica) collected by the TAIWAN expeditions, with descriptions of two new species, Zootaxa 2405, pp. 1-47 : 31

Altiverruca navicula ( Hoek, 1913)

Figures 2 E, 21, 22

Verruca navicula Hoek, 1913: 134 , figs 4–6. — Nilsson-Cantell, 1927: 778, figs a–f. Altiverruca navicula . — Buckeridge, 1994: 100, fig. 5.

Material examined. NMNS 005087-00077, 1 specimen, Stn. CP285 (24º16.09’N, 122º11.52’E, 16 Jun. 2005, depth 2268–2426 m), BD 11.37 mm.

Diagnosis. Rostral and carinal apices marginal; myophore absent from fixed scutum; operculum nearly vertical to base; movable scutum and movable tergum interlocking with 4 ribs, caudal appendages long.

Description. Shell white, rostral and carinal apices marginal, carina and rostrum interlocking in a single rib; movable tergum quadrangular, scutal margin with 5 ribs, apex curved; movable scutum triangular, tergal margin with 4 ribs, apex curved ( Fig. 2 E). Maxilla bilobed, with dense setae, sparse setae along superior margin ( Fig. 21 A); maxillule with strong, wide notch on cutting edge, 2 large cuspidate setae above notch, dense setae in notch, 7 setae below notch ( Fig. 21 B); mandible with 3 teeth ( Fig. 21 C), lower margin long, with> 8 small, cuspidate setae, inferior angle pectinate, with cuspidate setae at angle ( Fig. 21 E); mandibular palp elongated, dense setae along superior margin ( Fig. 21 D); labrum slightly concave, fine, bi-dentate to quadridentate teeth on cutting margin ( Fig. 21 H). Cirrus I with rami unequal, outer ramus elongated, 27- segmented, inner ramus shorter, 15-segmented ( Fig. 22 A); cirrus II with rami unequal, outer ramus 27- segmented, inner ramus 11-segmented ( Fig. 22 B); cirrus III with outer ramus 30-segmented, inner ramus 27- segmented ( Fig. 22 C); cirrus VI with outer ramus 36-segmented, inner ramus 37-segmented ( Fig. 22 D); caudal appendage long, 34-segmented ( Fig. 22 D).

Distribution. Pacific Ocean

Remarks. This is a new record for Taiwanese waters.

Figures

FIGURE 2. Taiwanese deep-sea barnacles (right side view on A – C, top view for D – I). A. Annandaleum japonicum biramosum, B. Litoscalpellum spinosus sp. nov., C. Scalpellum stearnsii, D. Altiverruca longimandible sp. nov., E. Altiverruca navicula, F. Metaverruca defayeae, G. Metaverruca recta, H. Rostratoverruca krugeri, I. Hexelasma velutinum.

FIGURE 21. Altiverruca navicula. A. Maxilla, B. Maxillule, C. Mandible, D. Mandibular palp, E. Lower margin of mandible, F. Labrum, G. First and second teeth of mandible, H. Cutting edge of mandible, showing fine teeth. Scale bars in µm.

FIGURE 22. Altiverruca navicula. A. Cirrus I, B. Cirrus II, C. Cirrus III, D. Cirrus VI, showing caudal appendage. Scale bars in mm.