Tab. 2 in A new species of Hoplomyzon (Siluriformes: Aspredinidae) from Maracaibo Basin, Venezuela: osteological description using high-resolution computed microtomography of a miniature species

Tab. 2. Summary of characteristics variable within Hoplomyzon species based on examined material and literature (Stewart, 1985; Taphorn, Marrero 1990).
Character/speciesHoplomyzon atrizonaHoplomyzon cardosoiHoplomyzon papillatusHoplomyzon sexpapilostomaShape of anterior margin of mesethmoidMedian furrow and undeveloped cornuaStraight and slightly developed cornuaDeep median furrow and developed cornuaDeep median furrow and developed cornuaVentral surface of premaxillaWith paired bony knobsSmoothWith paired bony knobsWith paired bony knobsPremaxillary teethNot examinedAbsentPresentPresentDentary teethPresentAbsentPresentPresentUpper lip symphyseal papillaPairedUnpairedUnpairedPairedRictal barbelWell developedWell developedShortShortDorsal-fin raysSevenFiveFiveSixAnal-fin raysSixEightSixSevenVertebrae and shape of ventral pre-anal fin processes.8-9 laterally expanded; 10-11 branched9 laterally expanded 10-11 simple8-9 laterally expanded; 10-11 branched9-10 laterally expanded; 11 branched;Number of vertebrae30-31 (n = 2)30-32 (n = 3)29-30 (n = 2)29 (n = 1)Posterior lateral lineSomewhat straight on anterior bodyZig-zag on anterior bodyZig-zag on anterior bodySomewhat straight on anterior body