Tetraclitella karandei   Ross,  1971 (Barnacle)
Organism information awaits expert curation
Class: Maxillopoda

Size: Rostro-carinal diameter 10.1 mm; height 3.5 mm; rostro-carinal diameter of orifice 3.6 mm; height of scutum 1.5 mm; width of scutum 2.1 mm; height of tergum 1.5 mm; width of tergum 1.0 mm. The mean rostro-carinal diameter of five paratypes in 13.5 mm and the height is 3.8 mm.

Color: Shell white or grayish white

Shell patelliform, ovate in outline, covered with persistent, hirsute, chitinous cuticle; parietes ornamented with prominent growth ridges and high, primary, longitudinal ribs intercalated with lower secondary and tertiary ribs; ribs square to T-shaped in section, extending from orifice to or beyond basal edge of shell occasionally bifurcate basally; orifice diamond-shaped; radii broad, horizontally ridged from base to apex, the ridges becoming progressively higher, produced and free from the surface; articular margin and finger like projections tubiferous, the apertural margins of the tubes being crenate; on the adjoining plate a narrow, longitudinal ridge occurs on parietal surface where the radius butts against the plate; alae broad, summits horizontal and crenate; sheath less than 1/2 height of wall, basal margin not depending; basis calcareous peripherally.
Scutum wider than high; external surface deeply sulcate; where the growth ridges are crossed by longitudinal ridges prominent nodes are formed thus rendering a scabrous appearance; articular ridge straight, about 2/3 length of tergal margin; adductor ridge low, not undercut, apically fused with articular ridge, terminating basally at basi-occludent angle; adductor muscle depression ovate, shallow, borders poorly delimited; depression for lateral depressor muscle shallow, poorly defined; depression for rostral depressor muscle lacking; apical portion of plate with weak ridges.
Tergum higher than wide; external longitudinal furrow open, broad, shallow, extending to base of spur; spur evenly rounded basally, confluent with scutal margin, width about 1/2 that of basal margin; articular ridge inclined; articular furrow wide and shallow; 6-7 crests for depressor muscle, low short, inclined; apical portion of the valve ridged or roughened.
Labrum with shallow, broad, medial depression; crest thick, heavily chitinized, armed with short, fine bristles but rarely with teeth. Palps long, broad, distal end broadly rounded; superior margin straight, basal margin convex; proximal setae on superior margin short, stout, coarsely bipectinate; distal setae on margin long, slender, finely bipinnate; basal portion of lateral surface covered with ctenae.
Mandible with 5 unequally spaced teeth; teeth 2 and 3 commonly with 1-2 subsidiary cusps; tooth 4 with 3-5 subsidiary cusps; comb between tooth 5 and inferior angle containing 8-12 teeth; inferior angle commonly with 1 long, slender and 1 short, stout tooth.
Inner maxilla with 2 long, stout and 1-2 shorter spines above sub-apical notch; 2-3 short, slender spines in notch; 6-8 stout spines medially; 8-12 short, slender spines in basal cluster. Outer maxilla bilobate; setae along apical margin long; bipinnate, setae becoming progressively shorter towards the notch; setae on basal lobe coarse, bipectinate.
Posterior ramus of cirrus I about 3/5 length of anterior ramus; intermediate articles of bothe rami broader than high; segments of anterior ramus normal, but those of posterior ramus protuberant; distal articles of both rami clothed with finely bipinnate setae. Rami of cirrus II essentially equal in length, and slightly longer than posterior ramus of cirrus I; medial segments of both rami protuberant; distal two segments of both rami armed with bipectinate setae, proximal segment with bipinnate setae. Rami of cirrus III of equal length, and same length as rami of cirrus II; medial segments of both rami protuberant; distal 2 or 3 segments of anterior ramus and all segments of posterior ramus armed with bipectinate setae; Cirri IV-VI essentially equal in length with equal rami; 1-2 stout spines and 2-3 long, slender setae at each articulation a long greater curvature of intermediate segments; 1 or 2 rows of ctenae present on lateral face of intermediate segments immediately below articulation; setation ctenopod, with 3 pairs of setae on each intermediate segment, and commonly a single proximal, short seta; at base of and between each major pair of setae there is a cluster of 3-5 short, slender setae.
Intromittent organ annulated throughout its length, and sparsely covered with short, slender bristles; distal extremity with 4 clusters of 11-14 setules.

Synonym (s)
Tetraclitella karandei Ross 1971

Common Name (s)
Economic Importance and Threats

Habitat:  Rocky, Coastal


• Maharashtra, Madh Island INDIA (Record: 2006)

Literature Source(s)
  • Fernando, SA (2006) Monograph on Indian Barnacles Ocean science and technology Cell, Kochi 9-199 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2012-05-22

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