Altiverruca longimandible, Chan, Benny K. K., Prabowo, Romanus Edy & Lee, Kwen-Shen, 2010
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publication ID |
https://doi.org/ 10.5281/zenodo.194179 |
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DOI |
https://doi.org/10.5281/zenodo.6211817 |
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persistent identifier |
https://treatment.plazi.org/id/C1306911-FFDD-0F7A-C988-FE29FB9BF800 |
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treatment provided by |
Plazi |
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scientific name |
Altiverruca longimandible |
| status |
sp. nov. |
Altiverruca longimandible sp. nov.
Figures 2 View FIGURE 2 D, 19, 20
Material examined. Holotype: ASIZCR 0 0 0 224, 1 specimen, Stn. CP375 (24º16.240’N, 122º11.720’E, 27 Aug. 2006, depth: 2216–2497 m), BD 9.78 mm. Paratype: NMNS-6006-003, 2 specimens, locality same as holotype, BD 8.2–9.8 mm.
Diagnosis. Altiverruca with single interlock between rostrum and carina, movable tergum interlocking with movable scutum by 3 main ribs; lower margin of mandible long, smooth, naked; caudal appendage long, 1/2 length of cirrus VI.
Description. Shell white, some individuals covered by dark brown coating ( Figs 2 View FIGURE 2 D, 20A); apices of rostrum and carina marginal, produced, curved outwards ( Figs 2 View FIGURE 2 D, 20A); rostrum and carina interlocking by 1 major rib; rostrum without secondary ridges directed towards tergal base ( Figs 2 View FIGURE 2 D, 20A); movable tergum quadrangular, interlocking with movable scutum by 3 main ribs; movable scutum triangular ( Figs 2 View FIGURE 2 D, 20A). Maxilla bilobed, dense, shorter setae clustered on lobes, long setae along superior margin ( Fig. 19 View FIGURE 19 A); maxillule with wide notch, basal region of cutting edge expanded ( Fig. 19 View FIGURE 19 B); 2 large, robust, cuspidate setae above notch, ~ 10 fine, cuspidate setae in notch, 8 large, cuspidate setae below notch ( Fig. 19 View FIGURE 19 B); mandible elongated, with 3 teeth, equally spaced, lower margin very long, smooth, naked, inferior angle blunt, minutely pectinated ( Figs 19 View FIGURE 19 C, E); mandibular palp elongated, setae along superior margin ( Fig. 19 View FIGURE 19 D); labrum not concave, cutting edge straight, with numerous fine teeth ( Fig. 19 View FIGURE 19 F). Cirrus I with rami unequal, outer ramus antenniform, 24-segmented, inner ramus short, 10-segmented ( Fig. 20 View FIGURE 20 B); cirrus II with rami unequal, outer ramus antenniform, 21-segmented, inner ramus short, 10-segmented, with dense setae ( Fig. 20 View FIGURE 20 C); cirri III–VI similar, rami subequal, long, slender; cirrus III with outer ramus 28-segmented, inner ramus 22-segmented; cirrus IV with outer ramus 32-segmented, inner ramus 34-segmented; cirrus V with outer ramus 27- segmented, inner ramus 30-segmented; cirrus VI with outer ramus 33-segmented, inner ramus 33-segmented ( Figs 20 View FIGURE 20 D, E, F, G); caudal appendage long, 1/2 length of cirrus VI, 32-segmented ( Fig. 20 View FIGURE 20 G).
Etymology. The species is named with respect to the long, lower margin of the mandible. The name of this species is treated as a noun in apposition.
Distribution. Presently known only from the type locality.
Remarks. In the present study, Altiverruca longimandible sp. nov. was recorded in the eastern waters of Taiwan. From external shell morphology, Altiverruca longimandible sp. nov. is similar to A. navicula ( Hoek, 1913) in having the apices of the rostrum and carina produced, the rostrum and carina interlocking with 1 rib and the movable scutum and tergum interlocking by several strong ribs. The mandible of A. longimandible sp. nov., however, has a very long, smooth, fragile lower margin that is devoid of setae, terminating at the blunt inferior angle, whilst that of A. navicula has a pectinated lower margin. Buckeridge (1994, 1997) reported that variation in mandible morphology may occur in A. navicula . In the present study, dissection of three specimens of A. longimandible sp. nov. revealed similar mandible morphology, suggesting that morphological variation of the mandible is not obvious in this species.
The mandible of Altiverruca vitrea Zevina, 1988 has a relatively long lower margin compared to other species, but it bears two teeth, whereas Altiverruca longimandible sp. nov. has three. No other barnacles have been reported to have such an exceptionally long lower margin ( Zevina, 1987, 1988, 1993; Buckeridge, 1994; Young, 1998, 2002) and, therefore, this species is considered new to science.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.