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THE CORAL TRIANGLE: HEARST BIODIVERSITY EXPEDITION 
15- Upper margins of carina and latera without teeth or projections.16 
15- Upper margin of carina and latera with tooth-like projections.C. dentifer (Broch, 1922) 
(Japan, East China Sea; type hosts Isiidae and ”Muricaeidae”= Plexauridae) 
16- Shell very white, not pink or reddish.17 
16- Shell pink to deep red in color.C. fragilis (Broch, 1931) 
(Indonesia, Amboina Bay; type host ’’gorgonian”) 
17- Basis with radiating grooves aligned with wall plate sutures,extemal surface of wall plates 
rough, wall plates and basis thin and easily disarticulated.C. pygmaea (Broch, 1931) 
(Indonesia, east of Pulau-Kai-besar, 5° 43’ S., 132° 55’ E; host ’’slender Gorgonian”) 
17- Basis without radiating grooves aligned with wall plate sutures, basis external surface of wall 
plates smooth.C squamosa Rosell, 1991 
(Philippines, South China Sea, Mindoro Strait; type host “white gorgonian”) 
18- Basis firmly attached to host axis, growing around the axis to form a groove or furrow at the 
point of attachment. C. (Hoek, 1913) 
(hidonesia, Flores Sea, 8° 30’ S, 119° 7.5’ E; type host Acanthogorgia timncata) 
18- Basis not attached to host axis, or attached only at center of basis, proteinaceous material of 
host axis overgrowing shell wall.Acastinae 19 
Subfamily Acastinae Kolbasov, 1993 
Genus Acasta Leach, 1817 
Acasta vipensis Van Syoc, Carrison-Stone, Madrona, and Williams, sp. nov. (B) 
Figures 25-28, Table 7 
Material examined.— Holotype: CASIZ 191930, 1 whole specimen attached to host. 
Locality: Philippines, Luzon Island, Batangas Province, Calumpan Peninsula Maricaban Strait, 
“Murals” dive site. 13.69936°N., 120.88250°E. HEP-25. Attached to Menella sp. Collector: 
Michelle Weber, 3 May 2011. Paratypes: CASIZ 187687, 3 whole 1 dissected specimens, in 95% 
EtOH. Locality: Philippines, Luzon Island, Batangas Province, Calumpan Peninsula Maricaban 
Strait, “Murals” dive site. 13.69936°N., 120.88250°E. HEP-25. Attached to Menella sp. Collector: 
Michelle Weber, 3 May 2011; CASIZ 187686, 11 whole, 2 dissected specimens, in 95% EtOH, 
SEM stub of opercular plates, microslide of ciiri and mouthparts. Locality: Philippines, Luzon 
Island, Batangas Province, Calumpan Peninsula Maricaban Strait, “Murals” dive site. 
13.69902°N., 120.88270°E. HEP-30. Attached to Menella sp. Collector: Dito dela Rosa, 3 May 
2011; CASIZ 187706, 5 whole, 2 dissected specimens in 95% EtOH. Locality: Philippines, Luzon 
Island, Batangas Province, Calumpan Peninsula Maricaban Strait, “Basketball” dive site. 
13.68594°N., 120.89172°E. HEP-47. Collector: Elliott Jessup, 11 May 2011; CASIZ 185883, 
4 dissected specuriens in 95% EtOH, SEM stub of opercular plates, microslide of cirri and mouth- 
parts. Locality: Philippines, Luzon Island, Batangas Province, Calumpan Peninsula Maricaban 
Strait, “Murals” dive site. 13.69936°N., 120.88250°E. HEP-25. Attached to Menella sp. Collector: 
Michelle Weber, 3 May 2011; CASIZ 187717, 12 whole, 3 dissected specimens in 95% EtOH. 
Locality: Philippines, Luzon Island, Batangas Province, Balayan Bay, “Ligpo” dive site. 
13.81964°N., 120.90078°E. HEP-18 Attached to Menella sp. Collector: Robert Van Syoc, 2 May 
2011; CASIZ 187767, 1 whole, 3 dissected specimens in 95% EtOH. Locality: Locality: Philip¬ 
pines, Luzon Island, Batangas Province, Calumpan Peninsula Maricaban Strait, “Murals” dive site. 
13.69936°N., 120.88250°E. HEP-25. Attached to Menella sp. Collector: Robert Van Syoc, 3 May 
