VAN SYOC ET AL.: SEVEN NEW BARNACLES FROM THE PHILIPPINES 
187 
along ridge bet\^^een inferior and superior margins. Palp elongate rectangular shape, comers round¬ 
ed; dense, long, fine setae distally and along inferior surface; inferior and superior margins fairly 
straight to convex. Cimus I anterior ramus about twice as long as posterior; rami tapered; setae 
bushy, medium length. Cin'us II anterior ramus I /3 to % longer than posterior; rami thick, slightly 
tapered apically; inferior margin of segiuents more pronounced and rounded than superior margin; 
segments encircled with setae, inferior margin setae longer, superior margin setae shorter. Cirrus 
III anterior ramus slightly tapered apically, almost twice as long as posterior; inferior margin of 
segments more pronounced and rounded than superior margin; setae similar to CII; anterior rami 
with amiature along inferior margin, spines dense. Cirrus IV rami similar in length, tapered, much 
longer than Cl, CII, CIII; setae longer and more sparse than Cl, CII, CIII, setae longer on inferior 
margin, shorter on superior margin; inferior margin slightly more rounded than superior; inferior 
margin of anterior rami with armature, spines less dense than CIII, spines extend to basal segment. 
Cirms V rami longer than CIV; inferior margin setae fine, long; superior margin setae short, con¬ 
centrated at segment junctions. Cirrus VI similar to CV. Penis long, annulated; sparsely covered in 
short fine setae; large spine at base, spine apically rounded. All cirral setae simple. 
Table 3. Cirral formula for Conopea margaretae sp. nov. Segment counts from paratypes, 
CASIZ 185864Aand 185864B. 
Cin'us 
I 
II 
III 
IV 
V 
VI 
Anterior ramus 
7-9 
8-9 
9-11 
17-20 
18-20 
21-25 
Posterior ramus 
13-16 
11-14 
9-12 
22-23 
22-23 
23-26 
Etomology.— This species is named in honor of Margaret Hearst, philanthropist and bene¬ 
factor of the California Academy of Sciences and funder of the 2011 joint expedition to the Philip¬ 
pines. 
Distribution. — Known only from the type locality in the Verde Island Passage, Philippines. 
Species comparisons. — The species of Conopea that is most similar externally to C. mar¬ 
garetae is C. proripiens. Both species have extremely elongated basis and rostrum. However, the 
Carina of C. margaretae is much more elongate than that of C. proripiens. The carina of C. mar¬ 
garetae also slopes gradually from the summit to the basal margin. In C. proripiens it is nearly ver¬ 
tical from the summit to >4 down toward the basis where it sharply breaks to a much lower and 
gradual slope to the basal margin. In both the basis and rostrum are white, with vertical/longitudi¬ 
nal red stripes on the carina, carino-latera and latera. Both have visible, white, radii open from basal 
margin to summits. The basal margin of the shell wall has a sinuous appearance in both species, 
generally higher in the oldest part in the middle, sloping down gently toward the tips. The scutum 
of C margaretae lacks a lateral depressor pit, whereas it is present, though bai*ely visible in 
C. proripiens. The tergum of C. margaretae has 7-8 depressor muscle crests, there are 6 in the 
illustration of the type of C. proripiens. Both species live on hosts in the family Ellisellidae. 
Conopea margaretae is also similar to Conopea. rninyrostrum and clusters most closely with it 
in the tree derived from COl nucleotide sequence data. It differs from C. minyrostrum in the much 
more elongated rostrum, the rostimm of C. minyrostrum is more steeply sloped and less elongated 
in relation to the carina. The rostmm of C. margaretae is much more elongated than the carina. It 
slims gradually down to a fine point at the end. The rostrum of C. minyrostrum is much shorter and 
