Redescription and anatomical investigation of Schroederichthys maculatus Springer, 1966 and S. saurisqualus Soto, 2001 with comments on their systematics (Chondrichthyes: Carcharhiniformes: Atelomycteridae) Author Soares, Karla D. A. Universidade de São Paulo, Departamento de Zoologia, Instituto de Biociˆencias, Rua do Matão, Trav. 14, n 101, São Paulo, SP, CEP 05508 - 900, Brazil Author Zanini, Flávia Universidade Federal do Rio de Janeiro, Departamento de Zoologia, Instituto de Biologia, Av. Carlos Chagas Filho, 373, Centro de Ciências e Saúde, Bloco A, Rio de Janeiro, RJ, CEP 21941 - 902, Brazil text Zoologischer Anzeiger 2023 2023-01-31 302 224 238 http://dx.doi.org/10.1016/j.jcz.2022.12.003 journal article 304128 10.1016/j.jcz.2022.12.003 6b151d11-143c-45e5-ab71-e2696a3161df 1873-2674 10375904

Table 3 Measurements of neurocrania in percentages of nasobasal length (%NL) for specimens of Schroederichthys maculatus and S. saurisqualus. F, number of examined females; M, number of examined males.

Measurements	S. maculatus	S. saurisqualus
	M =1	M =	F =1
		1
Nasobasal length (NL)	26.4	50.9	46.7
Rostral length	25.0	31.8	25.5
Width across lateral rostral cartilages	18.2	13.0	15.6
Width across nasal capsules	80.2	68.7	73.2
Nasal capsule width	44.7	37.7	39.6
Nasal capsule length	47.3	36.9	38.7
Distance between nasal apertures	15.5	27.7	28.3
Nasal aperture width	25.4	20.4	24.8
Distance between rostral base and posterior edge	40.9	38.1	39.2
of anterior fontanelle
Anterior fontanelle width	20.1	12.2	17.3
Width across orbital notches	42.7	31.0	34.0
Orbit length	39.4	45.4	44.7
Preorbital process length	8.8	7.3	6.0
Postorbital process length	9.3	8.0	8.1
Width across suborbital shelves	55.0	47.9	51.8
Otic capsules length	32.2	24.7	24.2
Width across otic capsules	55.9	47.7	51.6
Width across preorbital processes	67.7	54.4	54.0
Width across postorbital processes	70.3	65.2	64.7