Raspailiidae (Porifera: Demospongiae: Axinellida) from the Mexican Pacific Ocean with the description of seven new species Author Aguilar-Camacho, Jose Maria Author Carballo, Jose Luis text Journal of Natural History 2013 J. Nat. Hist. 2013-05-01 47 25 - 28 1663 1706 http://dx.doi.org/10.1080/00222933.2013.769642 journal article 10.1080/00222933.2013.769642 1464-5262 4607504 74DE7552-F218-48AF-89E2-2EB24465404F Eurypon diversicolor sp. nov. ( Figures 14C , 19 , 20 ) Material examined Holotype : MCNM 1.01 / 660, 10 / 06 / 2003 , Isla Redondas (Marietas, Nayarit), 12 m (20 ◦ 42 ′ 03 ′′ N, 105 ◦ 34 ′ 31 ′′ W) . Paratypes : 818-LEB-ICML-UNAM, 10 / 06 / 2003 , Isla Redondas ( Marietas , Nayarit ), 12 m (20 ◦ 42 ′ 03 ′′ N, 105 ◦ 34 ′ 31 ′′ W) . 1500- LEB-ICML- UNAM , 11 / 10 / 2006 , Cueva Marietas ( Bahia Banderas , Nayarit ), 10 m (20 ◦ 42 ′ 01 ′′ N, 105 ◦ 33 ′ 57 ′′ W). Description Encrusting sponge, size 3–6 cm length × 2–5 cm width and 2–10 mm thick. Oscules and ostia not observed. Surface hispid with spicule projections evenly distributed. Figure 19. Eurypon diversicolor sp. nov. Scanning electron microscopy images of spicules. (A) Choanosomal tylostyle head; (B) choanosomal tylostyle end; (C) acanthostyle I; (D) acanthostyle II. Scale bars: 10 µm (A, B), 50 µm (C, D). Figure 20. Drawings of Eurypon diversicolor sp. nov. (A) Choanosomal tylostyle / style; (B) acanthostyles recurved by short spines (two categories); (C) choanosomal skeleton (hymedesmoid). Scale bars: 30 µm (A–C), 80 µm (D). Consistency hard and difficult to tear. Colour in life is orange or yellow, pale in preservation ( Figure 14C ). Skeleton Straight choanosomal subtylostyles: 900–1710 × 10–30 µm ( Figures 19A, B , 20A ). Curved or straight acanthostyles with prominent recurved spines in two categories: 210–390 × 10–17.5 µm ( Figures 19C , 20B ) and 60–180 × 5–15 µm ( Figures 19D , 20B ) ( Table 10 ). The ectosomal skeleton is absent. The points of the spicules protrude externally. The choanosomal skeleton has a hymedesmoid structure. Main subtylostyles and acanthostyles are erect in a spongin layer ( 10–20 µm thick) ( Figure 20C ). Table 10. Spicule measurements of Eurypon diversicolor sp. nov. in µm.

Material	Subtylostyles	Acanthostyles
examined	(Length × Width)	(Length × Width)
MCNM	1120-(1321.5)-1690 × 10-(18.1)-30	1) 200-(302.4)-370 × 10-(15.2)-17.5
1.01 / 660	2) 70-(100.6)-175 × 2.5-(8.8)-15
LEB-818	900-(1317.4)-1710 × 10-(17.9)-30	1) 230-(314.2)-390 × 10-(13.1)-17.5
2) 80-(124.2)-180 × 5-(8.5)-15
LEB-1500	1080-(1279.2)-1580 × 10-(16.2)-25	1) 210-(280.4)-360 × 10-(13.4)-17.5
2) 60-(98.5)-180 × 2.5-(6.9)-12.5

Remarks Eurypon diversicolor sp. nov. is found in the Mexican Pacific Ocean. The only similar species in the Eastern Pacific is E. nigrum Bergquist 1967 . This is a darkblue encrusting sponge described from Oahu (Hawaii). It has straight tylostyles in two sizes: 1200–2400 × 6–12 µm and 170–800 × 6–12 µm ; and acanthostyles (70–165 × 6–9 µm ). Eurypon diversicolor sp. nov. has acanthostyles in two categories ( Table 10 ). The acanthostyles I are longer in E. diversicolor sp. nov. than in E. nigrum . Eurypon duoacanthostyla ( Hoshino, 1981 ) is an orange encrusting sponge described from Mitsusuke ( Japan ) at 15 m depth. It has straight styles (250–320 × 5–8 µm ) and acanthostyles in two categories: 250–280 × 7–9 µm and 138–180 × 6–8 µm . Eurypon diversicolor sp. nov. has longer and thicker styles than E. duoacanthostyla . The other species belonging to the genus Eurypon from the Pacific Ocean have spicules of different length than E. diversicolor sp. nov. ( Table 12 ). Etymology Named diversicolor which means different colours in Latin.