Globuloverruca spongophila, Young, 2004

Young, Paulo S., 2004, Globuloverruca spongophila gen. nov., sp. nov. a sponge-associated verrucid (Crustacea: Cirripedia: Thoracica) from Easter Island, with discussion on the morphology of the plate tubules, Zootaxa 420 (1), pp. 1-10 : 2-6

publication ID	https://doi.org/ 10.11646/zootaxa.420.1.1
DOI	https://doi.org/10.5281/zenodo.5236753
persistent identifier	https://treatment.plazi.org/id/03EF8789-FFE2-5310-7D74-8175FD01FD67
treatment provided by	Felipe
scientific name	Globuloverruca spongophila
status	sp. nov.

Treatment

Globuloverruca spongophila sp. nov. ( Figs 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 )

Material examined: Holotype, Easter Island, coll. Louis H. DiSalvo, July/ September 1985, 50 meters on Microcionidae sponge, probably Echinoclathria sp. (E. Hadju det.) rc: 3.34mm, SIOBIC C 9426; Paratypes: same locality, several specimens – some left in the sponge, others removed, rc: 1.58–3.46mm, SIOBIC C 9426; MNRJ 19522.

Etymology: From the Greek spongia (sponge) and philos (having an affinity for).

Diagnosis: Shell globose. Rostrum and carina strongly convex, apexes curving over opercular plates. Rostrocarinal suture dentate. Scutum and fixedscutum with projecting adductor ridges. Fixedtergum with internal projecting ridge overhanging a shallow depression. Opercular plates proportionally small, parallel to base of wall. Cirri I–III strongly unequal, anterior rami onefourth to onethird length of posterior; articles of posterior rami with combs of denticles.

Description: Shell ( Fig. 1 View FIGURE 1 ) white, globose, permeated by single rows of tubules deployed between growth lines on all plates; ribs of rostrum and carina interdiar fating along rostrocarinal suture; basal margin not thickened. Rostrum and carina similar in size, strongly convex and with upper portions developed and curving over opercular plates ( Fig. 1a, b View FIGURE 1 ). Rostrum ( Fig. 1a–c View FIGURE 1 ) with surface almost smooth but some parts a little knobbly; apex obtuse; with equalsize, large and flat ribs to rostrocarinal suture forming a strong dentate suture; and with one large radiuslike projection directed to carinoscutal suture. Carina ( Fig. 1a–c View FIGURE 1 ) smooth; apex obtuse; ribs extending to rostrocarinal suture, large, flat, equalsize; and with one large radiuslike projection directed to fixedtergal suture. Fixedscutum ( Fig. 1c, f View FIGURE 1 ) with parities smooth, apex projected outward; with a large alarlike projection forming part of rostral suture; fixed scutotergal suture straight, with a small radiuslike projection; internally, with a projected rounded adductor ridge. Fixedtergum ( Fig. 1c, e View FIGURE 1 ) similar in size to fixedscutum, with parities smooth, apex projected outward; with a large alarlike projection forming part of carinal suture; fixed scutotergal suture straight, with an alarlike projection on upper part, and a small projection below; internally, largely hollowed out. Base membranous and flat.

Opercular plates parallel to base of shell, proportionally small, and partially covered by curved apices of rostrum and carina ( Fig. 1a, d View FIGURE 1 ). Tergum ( Fig. 1a View FIGURE 1 , 2a, c View FIGURE 2 ) trapezoidal, with apicobasal ridge thin and prominent, projecting below lower margin, articular margin folded into two wide ridges above separated by a conspicuous depression; carinal portion smooth. Internally smooth and flat; articular margin irregular. Scutum ( Fig. 1a View FIGURE 1 , 2b, d, e View FIGURE 2 ) smaller than tergum; with one articular ridge; central portion elongate somewhat triangular in shape with scutal border conspicuous and sloping gradually to rostral surface, thin; second ridge twice width of axial ridge paralleling scutal margin; rostral area smooth. Internally, scutum largely hollowed out; upper portion supporting a strong, projected adductor ridge; tergal margin nearly straight; apex projecting outward.

Labrum ( Fig. 3a View FIGURE 3 ) with a series of simple sharp teeth and several recurved setulae. Palp ( Fig. 3b View FIGURE 3 ) elongated, with simple setae on inner and distal margins. Mandible ( Fig. 3c, d View FIGURE 3 ) with five obtuse teeth on upper portion and three flattened and acute teeth including inferior angle below, distance between first and second twice distance between second and third, third tooth bifid. Maxilla I ( Fig. 3e View FIGURE 3 ) with lower portion slightly projected; two large stout setae at upper angle, and about 20 small to mediansize stout setae below. Maxilla II ( Fig. 3f View FIGURE 3 ) bilobed, lobes separated by shallow concavity; covered by long simple setae, except on concavity.

Cirrus I ( Fig. 4a, b View FIGURE 4 ) with unequal rami, anterior ramus onethird length of posterior, covered by numerous simple setae; anterior ramus with slightly protuberant articles; articles of posterior ramus with simple setae along lesser curvature; stout setae on posterodistal margins and combs of short, stiff setae along distal margins of articles. Cirrus II ( Fig. 4c, d View FIGURE 4 ) with unequal rami, anterior ramus onequarter length of posterior, both rami covered by numerous stout setae; anterior ramus with slightly protuberant articles; articles of posterior ramus similar to those of cirrus I. Cirrus III ( Fig. 5a–c View FIGURE 5 ) with anterior ramus about onethird length of posterior, otherwise similar to cirrus II except distal article of anterior ramus with bipectinate and simple setae and of posterior ramus more slender. Rami of cirri IV– VI ( Fig. 5d View FIGURE 5 ) equal in length, not much longer than longer rami of cirri II and III. Intermediate articles of cirrus VI ( Fig. 5e View FIGURE 5 ) with length about twice width; six pairs of simple setae on anterior margin; none to three fine simple setae on posterior angle. Caudal appendage ( Fig. 5d View FIGURE 5 ) with 11 articles, two and a half times length of protopodite of cirrus VI; long simple setae on distal margins of articles. Penis ( Fig. 5f View FIGURE 5 ) about twice length of protopodite, distal half clothed with thin setulae. Number of articles of cirri I– VI and caudal appendage is presented in table 1.