Tetraclitidae Gruvel 1903

Figure 1. Tetraclita ehsani sp. n. A external parietes of the holotype and the top and basal view of the parietes of a paratype (ASIZCR 000231); note the basal view showing the parietal tubes B external view of scutum and tergum of the paratype (ASIZCR 000231) C internal view of scutum and tergum, (ASIZCR 000231); arrows indicate the diagnostic features of tergum from other Western Indian Ocean species (see table 1) D drawing of the holotype of the scutum and tergum E Scutum and tergum of Tetraclita rufotincta collected from Yemen (type locality) (after Chan et al. 2009) F scutum and tergum of Tetraclita reni collected from Madagascar (type locality) (after Chan et al. 2009).

Figure 2. Tetraclita ehsani sp. n. Light microscopy showing: A mandibular palp B labrum (two individuals) C mandibles (3 individuals) and with enlarged views of lower margin and inferior angle D maxillule (2 individuals) and E maxilla.

Figure 3. Tetraclita ehsani sp. n. SEM showing: A mandibular palp B, C serrulate type setae on mandibular palp D labrum E cutting edge of labrum showing the 4 large sharp teeth F simple type setae on inner side of labrum G mandible H simple setae on the lateral side of the mandible I second bi-dentated tooth of the mandible J third tri-dentated tooth of the mandible K, fourth and fifth tooth of the mandible L, serrulate blade shaped setae on mandible M Maxillule N, O serrulate setae on maxillule surface P maxilla Q, R, serrulate setae on maxilla S simple setae on tip of maxilla.

Figure 4. Tetraclita ehsani sp. n. Light microscopy showing: A cirrus I B cirrus II C cirrus III D bidentate serrulate type setae on rami of cirrus III E intermediate segment of anterior ramus of cirrus VI F Long serrulate setae at cirrus VI. ANT – Anterior ramus, POS – Posterior ramus.

with sponges

Figure 5. Tetraclita ehsani sp. n. SEM showing: A cirrus I B, C, D, serrulate type setae on rami of cirrus I E cirrus II F, G serrulate type setae on rami of cirrus II H cirrus III I, J, K, serrulate type setae on rami of cirrus III L serrulate type setae on protopod of cirrus III M pappose setae on protopod of cirrus III.