Integrative taxonomy of calcareous sponges (Porifera: Calcarea) from Réunion Island, Indian Ocean Author Klautau, Michelle Author Lopes, Matheus Vieira Author Tavares, Gabriela Author Pérez, Thierry text Zoological Journal of the Linnean Society 2022 2021-05-06 194 671 725 journal article 20247 10.1093/zoolinnean/zlab014 5cbb504f-e207-44fa-ac62-807a6de2f2db 0024-4082 6354284 3E370CBF-7DD1-4E73-BC37-81BF12EDFEED LEUCASCUS TENUISPINAE SP. NOV. ( FIG. 15 ; TABLE 7 ) Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. org:act: 4EB114CF-5870-4338-95FE-09BE9C398196 . Diagnosis: Subglobular Leucascus . S skeleton composed of fusiform diactines, triactines and rare tetractines with short spines. Etymology: For the microspines on the apical actine of the tetractines ( tenues = thin; spinae = spines). Type locality: Portail Caves , La Réunion , Indian Ocean . Figure 15. Leucascus tenuispinae (holotype; UFRJPOR 8927). A, specimen in vivo . B, fixed specimen. C, tangential section of the surface. D, diactine. E, triactine. F, tetractine. G, apical actine of a tetractine with short spines. Table 7. Spicule measurements of Leucascus tenuispinae . H = holotype

Specimen	Spicule	Actine	Length (µm)		Width (µm)		N
Min	Mean	SD	Max	Min	Mean	SD	Max
UFRJPOR 8927 (H)	Diactine	324.3	433.2	97.7	648.6	13.5	16.8	2.6	21.6	14
Triactine	94.5	105.0	7.3	121.5	6.8	8.2	0.7	10.8	20
Tetractine	Basal	94.5	105.2	7.1	116.1	8.1	8.1	0.0	8.1	20
Apical	51.3	72.3	11.8	97.2	2.7	2.8	0.3	4.1	17

Ty p e m a t e r i a l: H o l o t y p e – U F R J P O R 8 9 2 7 (= 171110- ESB2 - TP2 ). Photos : TP6114–6116. Portail Caves , La Réunion , Indian Ocean , coll. T . Pérez, 10 November 2017 , 25 m depth .