Identification key to Peruvian haplosclerids

1a Microscleres are sigmas and toxas.......................................... Haliclona (Gellius) concreta sp. nov.

1b Microscleres absent................................................................................... 2

2a Oxeas do not exceed 95 µm, yellow colour alive............................. Haliclona (Reniera) parvuloxea sp. nov.

2b Oxeas exceed 105 µm, other colours...................................................................... 3

3a Presence of multispicular primary tracts................................................................... 4

3b Absence of multispicular primary tracts................................................................... 5

4a Choanosomal skeleton very regular, with abundant spongin enveloping the spicule tracts...... Niphates ruthecitae sp. nov.

4b Choanosomal skeleton not very regular, with scarce spongin, never enveloping the spicule tracts................................................................................................. Pachychalina lupusapia sp. nov.

5a Ectosomal skeleton specialized, a dense, uni- to paucispicular, isotropic reticulation................................ 6

5b Ectosomal skeleton unspecialized, absent................................................................. 10

6a Pink(ish) colour alive................................................................................. 7

6b Other colours alive................................................................................... 9

7a Repent-ramose habit.............................................. Haliclona (Halichoclona) marcoriosi sp. nov.

7b Encrusting habit...................................................................................... 8

8a Oscula aligned in rows on ridges, and oxeas 108–198 μm............... Haliclona (Halichoclona) multiosculata sp. nov.

8b Oscula not aligned in rows on ridges, and oxeas 87–135 μm............ Haliclona (Halichoclona) arequipaensis sp. nov.

9a White colour alive, with translucent surface, and hastate oxeas.............. Haliclona (Halichoclona) pellucida sp. nov.

9b Beige colour alive, no translucent surface, and acerate oxeas................. Haliclona (Halichoclona) paracas sp. nov.

10a Secondary lines only one spicules long................................................................... 11

10b Secondary lines one and more than one spicules long....................................................... 13

11a Without projections, purplish blue colour alive............................ Haliclona (Rhizoniera) baslaviae sp. nov.

11b Lobate projections, other colours....................................................................... 12

12a Oscula apical, lateral or basal on the projections; olive-green to yellow colour alive................................................................................................ Haliclona (Rhizoniera) manglarensis sp. nov.

12b Oscula mostly flush with the surface; light-brown colour alive................. Haliclona (Rhizoniera) zanabriai sp. nov.

13a Branches present, short, distal, bifurcating and anastomosing, beige to pinkish beige colour alive.................................................................................................. Chalinula ramiculosa sp. nov.

13b Branches absent, beige to light yellow colour alive...................................... Chalinula chelysa sp. nov.