Eurypon brunus, Aguilar-Camacho & Carballo, 2013

Aguilar-Camacho, Jose Maria & Carballo, Jose Luis, 2013, Raspailiidae (Porifera: Demospongiae: Axinellida) from the Mexican Pacific Ocean with the description of seven new species, Journal of Natural History (J. Nat. Hist.) 47 (25 - 28), pp. 1663-1706 : 1692-1695

publication ID	https://doi.org/ 10.1080/00222933.2013.769642
publication LSID	lsid:zoobank.org:pub:74DE7552-F218-48AF-89E2-2EB24465404F
DOI	https://doi.org/10.5281/zenodo.10527190
persistent identifier	https://treatment.plazi.org/id/03E287BA-9E45-533D-FE12-FA9A34E98C19
treatment provided by	Carolina
scientific name	Eurypon brunus
status	sp. nov.

Treatment

Eurypon brunus sp. nov.

( Figures 14D View Figure 14 , 21 View Figure 21 , 22 View Figure 22 )

Material examined

Holotype: MCNM 1.01 / 661, 31 / 10 / 2002, Isla Lobos 1 (Mazatlán, Sinaloa), 5 m (23 ◦ 13 ′ 49 ′′ N, 106 ◦ 27 ′ 43 ′′ W) . Paratypes: 653-LEB-ICML-UNAM, 29 / 10 / 2002, Isla Lobos 1 (Mazatlán, Sinaloa) 4 m (23 ◦ 13 ′ 49 ′′ N, 106 ◦ 27 ′ 43 ′′ W) . 655-LEB- ICML-UNAM, 31 / 10 / 2002, Isla Lobos 1 (Mazatlán, Sinaloa), 5 m (23 ◦ 13 ′ 49 ′′ N, 106 ◦ 27 ′ 43 ′′ W) . 1505-LEB-ICML-UNAM, 11 / 10 / 2006, Cueva Marietas ( Bahia Banderas , Nayarit), 11 m (20 ◦ 42 ′ 1 ′′ N, 105 ◦ 33 ′ 57 ′′ W).

Description

Encrusting sponge, size 3–4 cm length × 1–3 cm width and 5–7 mm thick growing over rocks. Oscules and ostia not visible. Surface hispid. Consistency fleshy and difficult to tear. Colour in life black or dark brown, pale in preservation ( Figure 14D View Figure 14 ).

Skeleton

Straight choanosomal subtylostyles in two categories: 700–1625 × 7.5–20 µm ( Figures 21A, B View Figure 21 , 22A View Figure 22 ) and 110–375 × 2.5–10 µm ( Figures 21C View Figure 21 , 22A View Figure 22 ). Acanthostyles with short recurved spines in two sizes: 200–390 × 7.5–20 µm ( Figures 21D View Figure 21 , 22B View Figure 22 ) and 60–190 × 2.5–12.5 µm ( Figures 21E View Figure 21 , 22B View Figure 22 ). Straight or curved subectosomal styles / anisoxeas: 260–520 × 1.75–5 µm ( Figures 21F View Figure 21 , 22C View Figure 22 ) ( Table 11). The ectosomal skeleton is absent. The choanosomal skeleton is hymedesmoid. Main subtylostyles and acanthostyles are embedded in a spongin layer. The styles / anisoxeas are dispersed in the subectosomal region ( Figure 22D View Figure 22 ).

Remarks

Eurypon brunus sp. nov. is a subtidal species from the Mexican Pacific Ocean. It is characterized by having subtylostyles in two categories, acanthostyles in two sizes and subectosomal styles / anisoxeas. The only species assigned to this genus which have these characteristics are Eurypon miniaceum ( Thiele 1905) and Eurypon graphidiophora ( Hentschel 1911) ( Table 12). Eurypon miniaceum ( Thiele 1905) is a red encrusting sponge described from Calbuco ( Chile) at 30 m depth. This species has choanosomal tylostyles in three categories 2000–3000 × 30 µm; 800 × 30 µm; and> 120 µm), acanthostyles (120 µm) and subectosomal styles (550 × 5 µm). Eurypon brunus sp. nov. has the acanthostyles I longer than in E. miniaceum . Eurypon graphidiophora ( Hentschel 1911) is a grey encrusting sponge described from Australia. This species has straight or curved styles (280–1500 × 7–11 µm), acanthostyles (48–88 × 5 µm) and ectosomal rhapides / styles (350–400 × 2–3 µm). The acanthostyles are longer in E. brunus sp. nov. than in E. graphidiophora .

Etymology

Named brunus , which means brown in Latin.