VAN SYOC ET AL.: SEVEN NEW BARNACLES FROM THE PHILIPPINES 
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Figure 3. Conopea willhearsti, mouth parts of paratypes. A labrum (CASIZ 187765); B mandible (CASIZ 185241); 
C maxilla I (CASIZ 111822); D maxilla II (CASIZ 111822); E mandibular palp (CASIZ 111822). Scale bar = 200pm. 
Distribution. — Known only from the type locality in the Verde Island Passage, Philippines. 
Species comparisons. — Conopea willhearsti has morphological affinities to C. sabangensis, 
C. margaretae, and C. proripiens. The external morphology is particularly similar, with basis, ros¬ 
trum and Carina extended longitudinally along the axis of the host. In both species, the extension 
of these plates is extreme to the point of converting the typical conical shell wall shape into a spin¬ 
dle shape. However, the basis of C. willhearsti is much deeper, especially at the carinal androsfral 
ends, than that of C. sabangensis, C. margaretae and C. proripiens. The bases of C. margaretae 
and C. proripiens taper from their thickest point, just below the carinolateral sutures, to the carinal 
and rostral ends. In these two species, at the carinal and rostral ends, the basis is nearly flat, with 
no depth. Although the basis of C. sabangensis is about as deep as that of C. willhearsti for much 
of its length, the rostral and carinal ends taper down such that the rostrum and carina nearly con¬ 
tact the host axis in C sabangensis. The basis remains well above the host axis in C. willhearsti. 
The scutum of C willhearsti has a well developed lateral depressor muscle pit, this is lacking in 
C. proripiens. The mandibular tooth of C willhearsti is not massive as described for C. prorip¬ 
iens. In the specimens we examined, the basal width of the scutum of C. willhearsti is greater than 
the height at the articular margin, it is wider than high. The scutum of C. sabangensis is higher than 
