196 
THE CORAL TRIANGLE: HEARST BIODIVERSITY EXPEDITION 
rior, and superior margin surfaces with long fine setae; apex rounded; base may be bulbous. Palp 
squat, rectangular with rounded comers; superior margin mildly convex; long sparse setae along 
superior margin, denser setae distally, medium length dense setae along inferior margin. Cirrus I 
anterior ramus Vs to 14 longer than posterior ramus, both rami tapered, anterior more so, both rami 
covered in long, dense, simple, setae, segmentation distinct. Cirms II anterior ramus % to 14 longer 
than posterior ramus, inferior segment margins bulbous, superior segment margins smoother, setae 
simple, dense, inferior setae longer, superior setae shorter. Cimis III anterior ramus Vs to 14 longer 
than posterior ramus; inferior segment margins bulbous, superior segment margins smoother; 
armature present along inferior margin of anterior ramus; setae simple, dense, shorter along supe¬ 
rior margin, longer along inferior margin. Cinus IV rami slightly unequal in length, tapered; arma¬ 
ture present along inferior margin of anterior ramus, less dense than CIII armature; segmentation 
not as distinct as Cl, CII, and CIII; setae simple, long along inferior margin, short and less dense 
along superior margin. Cirrus V rami similar in length, slightly longer than CIV, setae simple, long 
along inferior margin, short and less dense along superior margin. Cirms VI similar to CV Penis 
long, very fine short sparse setae, spine at base. All cin’al setae simple. 
Table 5. Cirral formula for Conopea basicuneata sp. nov. Segment counts from paratypes 
CASIZ 187652 and 106069. 
Cin*us 
I 
II 
III 
IV 
V 
VI 
Anterior ramus 
7-9 
5-8 
7-9 
14-17 
19 
16-20 
Posterior ramus 
13-16 
9-10 
9-13 
15-16 
21 
18-24 
Etomology. — Uniquely, this species has a wedge-shaped basis. From the Greek, basis and 
the Latin cimeatus, wedge-shaped. 
Distr[bution. — Known from reef areas around Romblon Island and the Verde Island Pas¬ 
sage, Philippines. 
Species comparisons. — The carina and rostrum morphology of C. basicuneata is similar to 
C acuta, C. investita, and C. mjobergi. All of these have elongated rostra with nearly vertical Cari¬ 
nas. However, none has a similarly low wedge-shaped basis. Instead, they all possess a cup-shaped 
basis. The basis of C. mjobergi is somewhat extended under the rostrum, but in a very limited fash¬ 
ion that cannot compare with the more pronounced elongation of the basis in C. basicuneata. The 
basis of C. exothobasis is also wedge-shaped, but it has less depth underneath the rostrum, where 
it becomes almost flat and is almost level with the host axis. The basis of C basicuneata tapers 
gradually and completely from a high wedge at the carinal end to a tapering point at the rostral end. 
The basis of C. exothobasis also extends far beyond the carinal margin, about the same distance as 
the width of the shell wall excluding the rostrum. 
Conopea exothobasis Van Syoc, Carrison-Stone, Madrona, and Williams, sp. nov. 
Figures 21-24, Table 6 
Material examined.— Holotype: CASIZ 191927, dissected, wall plates, basis, and proso¬ 
ma in 95% EtOH, opercular plates on SEM stub, cirri and mouthparts on microslide. Locality: 
Philippines, Luzon, Batangas Province, Calumpan Peninsula, “Dead Palm” dive site. 13.69569°N., 
120.88472°E. HEP-23. Attached to Ellisella sp. Depth: 30 meters. Collector: R. Van Syoc, 3 May 
2011. Paratype: CASIZ 187770, 1 specimen, dissected, in 95% EtOH. Locality: Philippines, 
Luzon, Batangas Province, Calumpan Peninsula, “Dead Palm” dive site. 13,69569°N., 
120.88472°E. HEP-23. Attached to Ellisella sp. Depth: 30 meters. Collector: R. Van Syoc, 3 May 
2011 . 
