Table 2. Measurement data for Megalonema xanthum, M in Two new cis-Andean species of the South American catfish genus Megalonema allied to trans-Andean Megalonema xanthum, with description of a new subgenus (Siluriformes: Pimelodidae)

Table 2. Measurement data for Megalonema xanthum, M. amaxanthum, and M. orixanthum; expressed in thousandths of the standard dimensions given in parentheses. SL=standard length, CPL=caudal-peduncle length, AFB=anal-fin base, ADL=adipose-fin length, HL=head length. Megalonema xanthumMegalonema amaxanthumMegalonema orixanthumMeasurementMeanNRangeHolMeanNRangeHolMeanNRangeStandard length in mm92.12364.3-12098667040-106100.375.44038.2-115.8Predorsal length (SL)33623309-35432034369326-36233734240326-361Preanal length (SL)71023688-73069471170685-74172270940684-736Prepectoral length (SL)22623192-42419422170191-27321021840196-257Prepelvic length (SL)43523415-44643645470429-49944044340424-471Head length (SL)22923208-24621422870205-25721822640211-246Caudal peduncle length (SL)20423186-21821919570178-21819120340187-219Caudal peduncle depth (CPL)41023336-47437442370336-48738539440326-452Dorsal spine length (SL)26620243-28729729059244-37129928828254-320Dorsal fin base (SL)14023129-15115313670108-15114213640125-147Pectoral spine length (SL)21621196-23019921764191-25721721537192-235Pelvic fin length (SL)24823233-26724926870223-32725526640230-311Anal fin height (AFB)1490201311-163712521341661088-167315901475381258-1655Anal fin base (SL)1042394-1171061127093-1421001044093-117Adipose length (SL)39323361-41936635869311-41537036140327-387Adipose height (ADL)18523165-21118520768165-25718619940156-246Dorsal to adipose distance (SL)552142-7864636925-9444564038-76Body depth (SL)19122158-22119118969161-23316918540152-226Body width (SL)16122146-17114113970118-16513313639115-155Bony interorbital (HL)23323204-25426823270183-28522823140196-279Eye diameter horizontal (HL)16823154-19524426370214-32126025840209-337Eye diameter vertical (HL)1102393-13614815870112-21416915040105-194Snout length (HL)47623440-50645043270373-48741142940383-483Internarial length (HL)22823198-26019118869149-21418318440145-210Internarial anterior width (HL)15123125-16214815670131-17713714940134-174Internarial posterior width (HL)16023138-17917719969162-22822422140196-246Eye to posterior nostril (HL)19423172-22622018369140-22716418340128-220Gape width (HL)45523393-49750245770346-53842545040372-488