Raspailia (Raspaxilla) hymani ( Dickinson, 1945 )

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 : 1668-1672

publication ID

https://doi.org/ 10.1080/00222933.2013.769642

publication LSID

lsid:zoobank.org:pub:74DE7552-F218-48AF-89E2-2EB24465404F

persistent identifier

https://treatment.plazi.org/id/03E287BA-9E5D-5316-FEA5-FA77371B8D40

treatment provided by

Carolina

scientific name

Raspailia (Raspaxilla) hymani ( Dickinson, 1945 )
status

 

Raspailia (Raspaxilla) hymani ( Dickinson, 1945)

( Figures 1B View Figure 1 , 4 View Figure 4 , 5 View Figure 5 )

Hemectyon hymani Dickinson, 1945 ; Green and Bakus, 1994:41–42.

Aulospongus hymani Desqueyroux-Faúndez and van Soest, 1997:442 .

Raspailia (Raspaxilla) hymani Hooper et al. 1999:685–687 .

Endectyon (Endectyon) hymani Lee et al. 2007:35 .

Material examined

Holotype: L35546 D-37, 03 / 03 / 1937, Isla Partida Cabo San Lucas ( MEX) 138 m VELERO 618–37 (No data). AHF-R-213 ( Dickinson 1945) . Additional material: AHF-R-214; 26 / 02 / 1941, Isla Cedros Baja California ( MEX) 28 ◦ 5.7 ′ N, 15 ◦ 31.2 ′ W, R / V VELERO III 117–119 m.

Description

Fan-shaped sponge 8–10 cm high and 3–6 cm in diameter. Surface hispid with unevenly distributed spicule projections. Oscules and ostia not observed. Consistency hard and difficult to tear. Colour in preservation green or yellow ( Figure 1B View Figure 1 ).

Skeleton

Straight or curved choanosomal styles: 1150–1720 × 25–50 µm ( Figures 4A View Figure 4 , 5A View Figure 5 ). Microspined rhabdostyles in two categories: the first long, curved and with prominent spines: 280–560 × 25–40 µm ( Figures 4B View Figure 4 , 5B View Figure 5 ); the second curved, with a pronounced head and with short spines: 130–260 × 7.5–15 µm ( Figures 4C View Figure 4 , 5C View Figure 5 ). Straight and curved ectosomal styles: 235–425 × 1.75–2.5 µm ( Table 3) ( Figures 4D View Figure 4 , 5D View Figure 5 ). The ectosomal skeleton is a dense layer of spongin (100 µm thick). The styles are dispersed with no special organization. There is a subectosomal extra-axial compressed skeleton formed by the rhabdostyles with the points protruding externally. The choanosomal skeleton has an axial organization of primary multispicular ascendant fibres (300–600 µm thick) interconnected by secondary multispicular fibres (100–250 µm thick). The reticulum forms rectangular irregular meshes (200–300 µm). The rhabdostyles II are echinating the primary fibres ( Figure 5E View Figure 5 ).

Remarks

Raspailia (Raspaxilla) hymani ( Dickinson 1945) is a deep-sea species from the West Pacific coast of the Baja California Peninsula. The holotype was considered lost by Hooper et al. (1999), but this material was found in the Allan Hancock Collection. Dickinson (1945) reported one category of rhabdostyles; however, the material examined (including the holotype) has two categories. This species was originally described in the genus Hemectyon ( Dickinson 1945) , but Desqueyroux-Faúndez and van Soest (1997) moved this species into the genus Aulospongus . Later, Hooper et al. (1999) transferred this species to the subgenus Raspaxilla (genus Raspailia ). The morphological difference between these genera is the choanosomal skeleton: axial extra-axially compressed in Raspailia (Raspaxilla) and a reticulum of compressed primary fibre bundles in Aulospongus .

R

Departamento de Geologia, Universidad de Chile

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Poecilosclerida

Family

Raspailiidae

Genus

Raspailia

Loc

Raspailia (Raspaxilla) hymani ( Dickinson, 1945 )

Aguilar-Camacho, Jose Maria & Carballo, Jose Luis 2013
2013
Loc

Endectyon (Endectyon) hymani

Lee 2007: 35
2007
Loc

Raspailia (Raspaxilla) hymani

Hooper 1999: 685 - 687
1999
Loc

Aulospongus hymani Desqueyroux-Faúndez and van Soest, 1997:442

Desqueyroux-Faundez and van Soest 1997: 442
1997
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