Verum hoeki (Gruvel, 1901)

Young, Paulo S., 2002, Revision of the Scalpellidae (Crustacea, Cirripedia) in the collection of the Muséum national d’Histoire naturelle, France, studied by Abel Gruvel, Zoosystema 24 (2), pp. 309-345 : 328-329

Verum hoeki (Gruvel, 1901)

( Fig. 16 )

Scalpellum hoeki Gruvel, 1901a: 260 ; 1902a: 132, pl. 4, fig. 23; 1902b: 290, pl. 24, figs 6, 9-16, 20; 1902c: 245; 1905: 46, fig. 49.

Verum hoeki – Zevina 1978b: 1348; 1981a: 236, fig. 172.

TYPE MATERIAL. — Syntypes: no locality, the specimens of the type series are very badly preserved. The capitular plates are detached and fouled by fungus. I could only restore two scuta, one terga and two upperlatus, mostly very eroded ( MNHN Ci 386). These plates are described below.

DIAGNOSIS. — Upper-latus triangular, with a conspicuous longitudinal ridge near scutal margin.

DISTRIBUTION. — Pacific Ocean, locality unknown, fixed on bryozoans.

DESCRIPTION

Tergum ( Fig. 16A ) with its surface area larger than scutum; with a slight and wide apicobasal ridge and fine longitudinal striae at mid-occludent basal portion. Basal margin nearly convex. Carinal margin straight. Occludent margin convex. Apex obtuse, nearly straight.

Scutum ( Fig. 16B ) separated in two surfaces by a conspicuous apico-basal ridge; with carinal portion nearly flat and occludent portion regularly convex, with some little conspicuous longitudinal striae; height about 1.5 time the greatest width. Basal and lateral margins straight. Tergal margin slightly concave. Occludent margin convex. Apex curved.

Upper-latus ( Fig. 16C ) triangular, umbo apical, not projecting, with a conspicuous longitudinal ridge near scutal margin. Scutal margin straight, others slightly convex, all about same size.

REMARKS

Verum hoeki was collected on bryozoans, from the Pacific Ocean, without any detailed locality ( Gruvel 1902b), and never recorded again. The figure of the capitulum in Gruvel’s (1902b) plate 24, fig. 6, is very schematic and most of the characters difficult to be discerned. The strong striations described by Gruvel (1902b) are not so evident in the remaining plates; only a light striation near the basal margins of the plates is discernable. But based only in the remaining plates, I suppose this species is valid due to a very characteristic upper-latus ( Fig. 16C ); it has a triangular shape with a conspicuous longitudinal ridge near the scutal border. I do not know any other species with this kind of upper-latus.

Figures

FIG. 16. — Verum hoeki (Gruvel, 1901), syntype (MNHN Ci 386); A, tergum; B, scutum; C, upper-latus. Scale bar: 1 mm.